If when your attempt to create device meta-data fails this is drbd preventing you from corrupting a file system present on the target partition.
$ drbdadm create-md drbd0
v08 Magic number not found
md_offset 30005817344
al_offset 30005784576
bm_offset 30004867072
Found ext2 filesystem which uses 190804004 kB
current configuration leaves usable 29301628 kB
Device size would be truncated, which
would corrupt data and result in
'access beyond end of device' errors.
You need to either
* use external meta data (recommended)
* shrink that filesystem first
* zero out the device (destroy the filesystem)
Operation refused.
Command 'drbdmeta /dev/drbd0 v08 /dev/sda4 internal create-md' terminated with exit code 40
drbdadm aborting
Once you have confirmed that the file system present on the target partition is no longer required at the prompt type the following:
Replace /dev/sdaX with the block device you are targeting.
dd if=/dev/zero of=/dev/sdaX bs=1M count=128
Once this has completed the drbdadm create-md drbd0 command will complete with a "success."
$ drbdadm create-md drbd0
v08 Magic number not found
v07 Magic number not found
v07 Magic number not found
v08 Magic number not found
Writing meta data...
initialising activity log
NOT initialized bitmap
New drbd meta data block successfully created.
success
$
The goal of the SCPlugin project is to integrate Subversion into the Mac OS X Finder.
- Support for Subversion.
- Access to commonly used source control operations via contextual menu [screenshot]
- Dynamic icon badging for files under version control. Shows the status of your files visually. [ screenshot ]
Occasionally as a Linux administrator you will be in the situation where working on a remote server and you are left with no option but to force a reboot the system. This may be for a number of reasons, but where I have found it most frequent is when working on Linux clusters in a remote location.
When the "reboot" or "shutdown" commands are executed daemons are gracefully stopped and storage volumes unmounted.
This is usually accomplished via scripts in the /etc/init.d directory which will wait for each daemon to shut down gracefully before proceeding on to the next one. This is where a situation can develop where your Linux server fails to shutdown cleanly leaving you unable to administer the system until it is inspected locally. This is obviously not ideal so the answer is to force a reboot on the system where you can guarantee that the system will power cycle and come back up. The method will not unmount file systems nor sync delayed disk writes, so use this at your own discretion.
To force the kernel to reboot the system we will be making use of the magic SysRq key.
The magic_SysRq_key provides a means to send low level instructions directly to the kernel via the /proc virtual file system.
To enable the use of the magic SysRq option type the following at the command prompt:
echo 1 > /proc/sys/kernel/sysrq
Then to reboot the machine simply enter the following:
echo b > /proc/sysrq-trigger
Voilà! Your system will instantly reboot.
{linkr:related;keywords:linux;limit:5;title:Related Articles}
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In this article Barry Mavin, CEO and Chief Software Architect for Recital provides details on how the Recital Database Server can be used to provide a solution for Universal Data Integration.
Overview
The Recital Database Server handles universal cross-platform data access to a wide range of data sources. The database server natively handles full remote SQL data access to Recital, Visual FoxPro, FoxPro, FoxBASE, Clipper and older dBase data. Using Bridges, it handles full remote SQL data access to C-ISAM and OpenVMS RMS. Using gateway connections, it handles full remote SQL data access to Oracle, MySQL, PostgreSQL, SQL Server, server-side ODBC, server-side JDBC and server-side OLE DB data sources. With its ability to access data using server-side ODBC, JDBC and OLE DB drivers from clients on all supported operating systems (Windows, Linux, Unix, OpenVMS), the Recital Database Server is an ideal Data Integration Solution for applications of all sizes and complexity.
Universal Data Integration Solutions
There are several ways in which data may be accessed by the Database Server.
Table 1:
Client Universal Data Access solutions for accessing local or remote data.
| Client | Solution |
|---|---|
| Recital | Use remote gateway connections |
| Visual FoxPro | Use the Universal ODBC Driver |
| Java (all platforms) | Use the Universal JDBC Driver |
| .NET Framework | Use the Universal .NET Data Provider |
| Microsoft Office | Use the Universal ODBC Driver |
| Windows Mobile | Use the Universal Compact Framework .NET Data Provider |
| PHP on Linux | Use the Universal ODBC Driver for Linux |
| Mono on Linux | Use the Universal .NET Data Provider |
| Others | If the data source you want to access is not in the list above, then you can use a remote ODBC, JDBC or OLE DB gateway. You can find examples of connection strings for most ODBC and OLE DB data sources by clicking here. |
Table 2:
Windows Server Universal Data Access solutions accessible from any remote client running on Windows, Linux, Unix or OpenVMS:
| Data Source | Solution |
|---|---|
| Recital | Native support (See table 1) |
| Visual FoxPro | Native support (See table 1) |
| FoxPro | Native support (See table 1) |
| FoxBASE | Native support (See table 1) |
| Clipper | Native support (See table 1) |
| dBase | Native support (See table 1) |
| C-ISAM | Use a bridge (See table 1) |
| Access | Use a gateway connection gateway="oledb:Provider=Microsoft.Jet.OLEDB.4.0;Data Source=\somepath\mydb.mdb;User Id=admin;Password=;" |
| Exchange | Use a gateway connection gateway="oledb:Provider=ExOLEDB.DataSource;Data Source=http://servername/publicstore" |
| Excel | Use a gateway connection gateway="oledb:Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\MyExcel.xls;" |
| Oracle | Use a gateway connection gateway="oledb:Provider=msdaora;Data Source=TheOracleDB;User Id=xxxxx;Password=xxxxx;" |
| SQL Server | Use a gateway connection gateway="oledb:Provider=sqloledb;Data Source=Aron1;Initial Catalog=pubs;User Id=sa;Password=asdasd;" |
| MySQL | Use a gateway connection gateway="oledb:Provider=MySQLProv;Data Source=mydb;User Id=xxxxx;Password=xxxxx;" |
| IBM DB2 | Use a gateway connection gateway="oledb:Provider=DB2OLEDB;Network Transport Library=TCPIP;Network Address=XXX.XXX.XXX.XXX;Initial Catalog=MyCtlg;Package Collection=MyPkgCol;Default Schema=Schema;User ID=MyUser;Password=MyPW" |
| Sybase ASA | Use a gateway connection gateway="oledb:Provider=ASAProv;Data source=myASA" |
| Sybase ASE | Use a gateway connection gateway="oledb:Provider=Sybase.ASEOLEDBProvider;Srvr=myASEserver,5000;Catalog=myDBname;User Id=username;Password=password" |
| IBM Informix | Use a gateway connection gateway="oledb:Provider=Ifxoledbc.2;password=myPw;User ID=myUser;Data Source=dbName@serverName;Persist Security Info=true" |
| Ingres | Use a gateway connection gateway="odbc:dsn=data_source_name" |
| Firebird | Use a gateway connection gateway="odbc:dsn=data_source_name" |
| IBM AS400 iSeries | Use a gateway connection gateway="oledb:PROVIDER=IBMDA400; DATA SOURCE=MY_SYSTEM_NAME;USER ID=myUserName;PASSWORD=myPwd" |
| Interbase | Use a gateway connection gateway="oledb:provider=sibprovider;location=localhost:;data source=c:\databases\gdbs\mygdb.gdb;user id=xxxxx;password=xxxxx" |
| Others |
If the data source you want to access is not in the list above, then you can use server-side ODBC, JDBC or OLE DB. |
Table 3:
Linux and Unix Server Universal Data Access solutions accessible from any remote client running on Windows, Linux, Unix or OpenVMS:
| Data Source | Solution |
|---|---|
| Recital | Native support (See table 1) |
| Visual FoxPro | Native support (See table 1) |
| FoxPro | Native support (See table 1) |
| FoxBASE | Native support (See table 1) |
| Clipper | Native support (See table 1) |
| dBase | Native support (See table 1) |
| C-ISAM | Use a bridge (See table 1) |
| Oracle | Use a gateway connection gateway="oracle:Connection_String" |
| MySQL | Use a gateway connection gateway="mysql:Connection_String" |
| IBM DB2 | Use a gateway connection gateway="db2:Connection_String" |
| PostgreSQL | Use a gateway connection gateway="postgres:Connection_String" |
| Others |
If the data source you want to access is not in the list above, then you can use a server-side JDBC driver. |
Table 4:
OpenVMS Server Universal Data Access solutions accessible from any remote client running on Windows, Linux, Unix or OpenVMS:
| Data Source | Solution |
|---|---|
| Recital | Native support (See table 1) |
| Visual FoxPro | Native support (See table 1) |
| FoxPro | Native support (See table 1) |
| FoxBASE | Native support (See table 1) |
| Clipper | Native support (See table 1) |
| dBase | Native support (See table 1) |
| RMS | Use a bridge (See table 1) |
| Others |
If the data source you want to access is not in the list above, then you can use a server-side JDBC driver. |
Supported Data Sources
Native Data Access
The Recital Database Server has native built-in support for the following data sources:
- Recital
- Visual FoxPro
- FoxPro
- FoxBASE
- Clipper
- dBase
You can setup tables to work with using the Database Administration Tool in Recital Enterprise Studio.
Bridges
Using Bridges, you can access the following data sources as if they were standard Recital/FoxPro tables:
- CISAM
- OpenVMS RMS
You can setup bridges using the Database Administration Tool in Recital Enterprise Studio.
Gateways/Connections
Using Gateways, you can transparently access the following local or remote data sources:
- Recital
- Oracle
- ODBC (Server-side ODBC data sources)
- JDBC (Server-side JDBC data sources)
- OLEDB Use this to connect to SQL Server and other Windows OLE DB data sources)
- MySQL
- PostgreSQL
Remote Data Object functions
Recital 10 includes a complete and robust set of data source independent functions for accession MySQL, Oracle, DB2 and Postgres. This article explains how to use them.
Client Data Access drivers
Included with the Recital Database Server are three Client drivers. These Client drivers can access any data sources supported by the Recital Database Server. They are not restricted to accessing only Recital data. They can be used to access server-side ODBC, JDBC and OLE DB data sources also.
Recital Universal .NET Data Provider
Use this client driver when building .NET applications with Visual Studio .NET. A data provider in the .NET Framework serves as a bridge between an application and a data source. A data provider is used to retrieve data from a data source and to reconcile changes to that data back to the data source.
Key features of the Recital Universal .NET Data Provider:
- Fully Internet enabled
The Recital Universal .NET Data Provider works across the internet providing access to a wide range of data sources located on remote servers running Windows, Linux, Unix and OpenVMS. - SQL Server compatible
The Recital Universal .NET Data Provider is plug compatible with the .NET Framework SQL Server Data Provider. - Cross-platform Data Integration
Using the Recital Universal .NET Data Provider, you can connect to remote Windows, Linux, Unix or OpenVMS servers and access any data source supported by the Recital Database Server. - Managed code
The Recital Universal .NET Data Adaptor written in C# is 100% .NET Framework managed code. - Runs on Windows Mobile
The Recital Universal .NET Data Adaptor runs under the .NET Compact Framework on Windows Mobile.
Recital Universal JDBC Driver
The JDBC API is the industry standard for database-independent connectivity between the Java programming language and a wide range of databases. The JDBC API provides a call-level API for SQL-based database access. JDBC technology allows you to use the Java programming language to exploit "Write Once, Run Anywhere" capabilities for applications that require access to enterprise data.
Key features of the Recital Universal JDBC Driver:
- Fully Internet enabled
The Recital Universal JDBC driver works across the internet providing access to a wide range of data sources located on remote servers running Windows, Linux, Unix and OpenVMS. - JDBC 3.0 API
The Recital Universal JDBC driver supports the JDBC 3.0 API. - Pure Java Type 3 Driver
The Recital Universal JDBC driver is a 100% pure Java Type 3 driver. - Full Access to Metadata
The JDBC API provides metadata access that enables the development of sophisticated applications that need to understand the underlying facilities and capabilities of a specific database connection. - Cross-platform Data Integration
Using the Recital Universal JDBC driver, you can connect to remote Windows, Linux, Unix or OpenVMS servers and access any data source supported by the Recital Database Server. - No Installation
A pure JDBC technology-based driver does not require special installation; it is automatically downloaded as part of the applet that makes the JDBC calls. The Recital Universal JDBC Driver is 100% java.
Recital Universal ODBC Driver
Connect to remote data from Microsoft Office or other applications that support ODBC data access. The Recital Universal ODBC Driver is also available for Linux and Unix.
Key features of the Recital Universal ODBC Driver:
- Fully Internet enabled
The Recital Universal ODBC driver works across the internet providing access to a wide range of data sources located on remote servers running Windows, Linux, Unix and OpenVMS. - Works with Crystal Reports
The Recital Universal ODBC driver supports the SQL syntax generated by Crystal Reports. - Works with Microsoft Office
The Recital Universal ODBC driver works with Microsoft Office products. - Works with PHP on Linux
The Recital Universal ODBC driver is available for Linux and works with PHP.
http://kbala.com/ie-9-supports-corner-radius/
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This website uses cookies. A cookie is a small amount of text data, sent from our webserver to your browser, and stored on your device. The cookie is sent back to the webserver each time the browser connects to this site. We use cookies to personalize the site and to streamline your interaction with the site.
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- accept personal information from them
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Updates to this Privacy Policy
We may update this policy. We will contact you if we make any substantial changes in how we use your personal information.
This privacy policy was last updated on July 1, 2010.
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If you have any questions about this privacy policy itself, or on how we use personal information on recitalsoftware.com, please contact us at This email address is being protected from spambots. You need JavaScript enabled to view it..
- Warnings
- Headers
- Icon set 1
- Icon set 2
- Icon set 3
- Tooltips
- Highlights
- Code
- Unordered lists
- Ordered lists
- Abbrs and acronyms
- Definition lists
- Legends
- Dropcaps
- Floated blocks
- Other span blocks
- Blockquotes
- Tables
Warnings
This is a sample info message. Use <p class="gkInfo1">Your info message goes here!</p>.
This is a sample tips message. Use <p class="gkTips1">Your tips goes here!</p>.
This is a sample warning message. Use <p class="gkWarning1">Your warning message goes here!</p>.
This is a sample info message. Use <p class="gkInfo2">Your info message goes here!</p>.
This is a sample tips message. Use <p class="gkTips2">Your tips goes here!</p>.
This is a sample warning message. Use <p class="gkWarning2">Your warning message goes here!</p>.
This is a sample info message. Use <p class="gkInfo3">Your info message goes here!</p>.
This is a sample tips message. Use <p class="gkTips3">Your tips goes here!</p>.
This is a sample warning message. Use <p class="gkWarning3">Your warning message goes here!</p>.
This is a sample info message. Use <p class="gkInfo4">Your info message goes here!</p>.
This is a sample tips message. Use <p class="gkTips4">Your tips goes here!</p>.
This is a sample warning message. Use <p class="gkWarning4">Your warning message goes here!</p>.
This is a sample info message. Use <p class="gkInfo5">Your info message goes here!</p>.
This is a sample tips message. Use <p class="gkTips5">Your tips goes here!</p>.
This is a sample warning message. Use <p class="gkWarning5">Your warning message goes here!</p>.
Headers
This is heading 1
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Integer semper egestas nunc in volutpat. Fusce adipiscing velit ac eros tempor iaculis. Phasellus venenatis mollis augue, non posuere odio placerat in. Etiam volutpat ultrices lectus. Fusce eu felis erat. Donec congue interdum elit, sed ornare magna convallis lacinia. In hac habitasse platea dictumst. Mauris volutpat consectetur accumsan.
This is heading 2
Cras diam justo, sodales quis lobortis sed, lobortis vel mauris. Sed a mollis nunc. Quisque semper condimentum lectus, eget laoreet ipsum auctor et. Quisque sagittis luctus augue, id fringilla enim euismod quis. Nullam blandit, elit at euismod rutrum, tortor nibh posuere mauris, in volutpat diam ante ac dui. Sed velit massa, imperdiet placerat tristique et, consectetur a lorem. Praesent aliquet turpis in quam tempor eu pulvinar nibh luctus.
This is heading 3
Vivamus rhoncus arcu sit amet est tristique convallis nec vel eros. Vestibulum euismod luctus velit quis porta. Aliquam varius placerat mauris sed vehicula. Integer porta facilisis sapien, in tempus lorem mattis molestie. Suspendisse potenti. Praesent quis diam non dolor convallis mattis eu id nulla.
This is heading 4
Proin urna erat, egestas vel consectetur at, accumsan at purus. Donec est risus, facilisis dignissim placerat nec, euismod lacinia nisi. Nam ac sem sed quam sollicitudin condimentum et eu neque. Nunc enim urna, ultricies ac mollis pretium, imperdiet hendrerit massa. Sed eleifend felis sed tellus cursus lacinia. Aenean venenatis aliquet euismod. Nam quis turpis tellus, vitae malesuada neque.
This is a headline.
This is a subheadline.
Use <p class="gkHeadling">for headline</p>.Use <p class="gkSubHeadline">for subheadline</p>.Proin urna erat, egestas vel consectetur at, accumsan at purus. Donec est risus, facilisis dignissim placerat nec, euismod lacinia nisi. Nam ac sem sed quam sollicitudin condimentum et eu neque. Nunc enim urna, ultricies ac mollis pretium, imperdiet hendrerit massa. Sed eleifend felis sed tellus cursus lacinia. Aenean venenatis aliquet euismod. Nam quis turpis tellus, vitae malesuada neque.
This is a small headline
This is a large headline
Use <p class="gkHeadling">for headline</p>.Use <p class="gkSubHeadline">for subheadline</p>.Proin urna erat, egestas vel consectetur at, accumsan at purus. Donec est risus, facilisis dignissim placerat nec, euismod lacinia nisi. Nam ac sem sed quam sollicitudin condimentum et eu neque. Nunc enim urna, ultricies ac mollis pretium, imperdiet hendrerit massa. Sed eleifend felis sed tellus cursus lacinia. Aenean venenatis aliquet euismod. Nam quis turpis tellus, vitae malesuada neque.
Icon set 1
This is a sample audio message. Use <p class="gkAudio">Your audio message goes here!</p>.
This is a sample webcam message. Use <p class="gkWebcam">Your webcam goes here!</p>.
This is a sample email message. Use <p class="gkEmail">Your email message goes here!</p>.
This is a sample creditcard message. Use <p class="gkCreditcard">Your creditcart message goes here!</p>.
This is a sample feed message. Use <p class="gkFeed">Your feed goes here!</p>.
This is a sample help message. Use <p class="gkHelp">Your help message goes here!</p>.
This is a sample images message. Use <p class="gkImages">Your images message goes here!</p>.
This is a sample lock message. Use <p class="gkLock">Your webcam goes here!</p>.
This is a sample printer message. Use <p class="gkPrinter">Your printer message goes here!</p>.
This is a sample report message. Use <p class="gkReport">Your report message goes here!</p>.
This is a sample script message. Use <p class="gkScript">Your script goes here!</p>.
This is a sample time message. Use <p class="gkTime">Your time message goes here!</p>.
This is a sample user message. Use <p class="gkUser">Your user message goes here!</p>.
This is a sample world message. Use <p class="gkWorld">Your world goes here!</p>.
This is a sample cart message. Use <p class="gkCart">Your cart message goes here!</p>.
This is a sample cd message. Use <p class="gkCd">Your cd message goes here!</p>.
This is a sample chart_bar message. Use <p class="gkChartBar">Your chart_bar goes here!</p>.
This is a sample chart_line message. Use <p class="gkChartLine">Your chart_line message goes here!</p>.
This is a sample chart_pie message. Use <p class="gkChartPie">Your chart_pie message goes here!</p>.
This is a sample clock message. Use <p class="gkClock">Your clock goes here!</p>.
This is a sample cog message. Use <p class="gkCog">Your cog message goes here!</p>.
This is a sample coins message. Use <p class="gkCoins">Your coins message goes here!</p>.
This is a sample compress message. Use <p class="gkCompress">Your compress goes here!</p>.
This is a sample computer message. Use <p class="gkComputer">Your computer message goes here!</p>.
This is a sample cross message. Use <p class="gkCross">Your cross message goes here!</p>.
This is a sample disk message. Use <p class="gkDisk">Your disk goes here!</p>.
This is a sample error message. Use <p class="gkError">Your error message goes here!</p>.
This is a sample exclamation message. Use <p class="gkExclamation">Your exclamation message goes here!</p>.
This is a sample film message. Use <p class="gkFilm">Your film goes here!</p>.
This is a sample folder message. Use <p class="gkFolder">Your folder message goes here!</p>.
This is a sample group message. Use <p class="gkGroup">Your group message goes here!</p>.
This is a sample heart message. Use <p class="gkHeart">Your heart goes here!</p>.
This is a sample house message. Use <p class="gkHouse">Your house message goes here!</p>.
This is a sample image message. Use <p class="gkImage">Your image message goes here!</p>.
This is a sample information message. Use <p class="gkInformation">Your information message goes here!</p>.
This is a sample magnifier message. Use <p class="gkMagnifier">Your magnifier message goes here!</p>.
This is a sample money message. Use <p class="gkMoney">Your money goes here!</p>.
This is a sample new message. Use <p class="gkNew">Your new message goes here!</p>.
This is a sample note message. Use <p class="gkNote">Your note message goes here!</p>.
This is a sample page message. Use <p class="gkPage">Your page goes here!</p>.
This is a sample page_white message. Use <p class="gkPage_white">Your page_white message goes here!</p>.
This is a sample plugin message. Use <p class="gkPlugin">Your plugin message goes here!</p>.
This is a sample accept message. Use <p class="gkAccept">Your accept goes here!</p>.
This is a sample add message. Use <p class="gkAdd">Your add message goes here!</p>.
This is a sample camera message. Use <p class="gkCamera">Your camera message goes here!</p>.
This is a sample brick message. Use <p class="gkBrick">Your brick goes here!</p>.
This is a sample box message. Use <p class="gkBox">Your box message goes here!</p>.
This is a sample calendar message. Use <p class="gkCalendar">Your calendar message goes here!</p>.
Icon set 2
This is a sample audio message. Use <p class="gkAudioIs2">Your audio message goes here!</p>.
This is a sample email message. Use <p class="gkEmailIs2">Your email message goes here!</p>.
This is a sample feed message. Use <p class="gkFeedIs2">Your feed message goes here!</p>.
This is a sample images message. Use <p class="gkImagesIs2">Your images message goes here!</p>.
This is a sample lock message. Use <p class="gkLockIs2">Your lock message goes here!</p>.
This is a sample printer message. Use <p class="gkPrinterIs2">Your printer message goes here!</p>.
This is a sample time message. Use <p class="gkTimeIs2">Your time message goes here!</p>.
This is a sample user message. Use <p class="gkUserIs2">Your calendar message goes here!</p>.
This is a sample world message. Use <p class="gkWorldIs2">Your world message goes here!</p>.
YThis is a sample cart message. Use <p class="gkCartIs2">Your cart message goes here!</p>.
This is a sample cd message. Use <p class="gkCdIs2">Your cd message goes here!</p>.
This is a sample chart line message. Use <p class="gkChartLineIs2">Your chart line message goes here!</p>.
This is a sample chart pie message. Use <p class="gkChartPieIs2">Your calendar message goes here!</p>.
This is a sample clock message. Use <p class="gkClockIs2">Your clock message goes here!</p>.
This is a sample config message. Use <p class="gkCogIs2">Your config message goes here!</p>.
This is a sample computer message. Use <p class="gkComputerIs2">Your computer message goes here!</p>.
This is a sample error message. Use <p class="gkErrorIs2">Your error message goes here!</p>.
This is a sample exclamation message. Use <p class="gkExclamationIs2">Your exclamation message goes here!</p>.
This is a sample movie message. Use <p class="gkFilmIs2">Your movie message goes here!</p>.
This is a sample folder message. Use <p class="gkFolderIs2">Your folder message goes here!</p>.
This is a group calendar message. Use <p class="gkGroupIs2">Your group message goes here!</p>.
This is a sample house message. Use <p class="gkHouseIs2">Your house message goes here!</p>.
This is a sample image message. Use <p class="gkImageIs2">Your image message goes here!</p>.
This is a sample information message. Use <p class="gkInfromationIs2">Your information message goes here!</p>.
This is a sample magnifier message. Use <p class="gkMagnifierIs2">Your magnifier message goes here!</p>.
This is a sample money message. Use <p class="gkMoneyIs2">Your money message goes here!</p>.
This is a sample page message. Use <p class="gkPageIs2">Your page message goes here!</p>.
This is a sample camera message. Use <p class="gkCameraIs2">Your camera message goes here!</p>.
This is a calendar feed message. Use <p class="gkCalendarIs2">Your calendar message goes here!</p>.
This is a sample contact message. Use <p class="gkContactIs2">Your contact message goes here!</p>.
This is a sample facebook message. Use <p class="gkFacebookIs2">Your facebook message goes here!</p>.
This is a sample like it message. Use <p class="gkLikeItIs2">Your like it message goes here!</p>.
This is a sample twitter message. Use <p class="gkTwitterIs2">Your twitter message goes here!</p>.
This is a sample video message. Use <p class="gkVideoIs2">Your video message goes here!</p>.
This is a sample youtube message. Use <p class="gkYoutubeIs2">Your youtube message goes here!</p>.
Icon set 3
This is a sample audio message. Use <p class="gkAudioIs3">Your audio message goes here!</p>.
This is a sample camera message. Use <p class="gkCameraIs3">Your camera message goes here!</p>.
This is a sample lock message. Use <p class="gkLockIs3">Your lock message goes here!</p>.
This is a sample user message. Use <p class="gkUserIs3">Your user message goes here!</p>.
This is a sample cart message. Use <p class="gkCartIs3">Your cart message goes here!</p>.
This is a sample chart bar message. Use <p class="gkChartBarIs3">Your chart bar message goes here!</p>.
This is a sample config message. Use <p class="gkConfigIs3">Your config message goes here!</p>.
This is a sample configuration message. Use <p class="gkConfig2Is3">Your configuration message goes here!</p>.
This is a sample computer message. Use <p class="gkComputerIs3">Your computer message goes here!</p>.
This is a sample coffe message. Use <p class="gkCoffeIs3">Your coffe message goes here!</p>.
This is a sample cross message. Use <p class="gkCrossIs3">Your cross message goes here!</p>.
This is a sample error message. Use <p class="gkErrorIs3">Your error message goes here!</p>.
This is a sample house message. Use <p class="gkHouseIs3">Your house message goes here!</p>.
This is a sample information message. Use <p class="gkInformationIs3">Your inforation message goes here!</p>.
This is a sample magnifier message. Use <p class="gkMagnifierIs3">Your magnifier message goes here!</p>.
This is a sample page message. Use <p class="gkPageIs3">Your page message goes here!</p>.
This is a sample lock message. Use <p class="gkLockIs3">Your lock message goes here!</p>.
This is a sample camera message. Use <p class="gkCameraIs3">Your camera message goes here!</p>.
This is a sample star message. Use <p class="gkStarIs3">Your star message goes here!</p>.
This is a sample telephone message. Use <p class="gkTelephoneIs3">Your telephone message goes here!</p>.
Tooltips
Here are some examples of a ClassicThis is just an example of what you can do using a CSS tooltip, feel free to get creative and produce your own!, CriticalCriticalThis is just an example of what you can do using a CSS tooltip, feel free to get creative and produce your own!, HelpHelpThis is just an example of what you can do using a CSS tooltip, feel free to get creative and produce your own!, InformationInformationThis is just an example of what you can do using a CSS tooltip, feel free to get creative and produce your own! and WarningWarningThis is just an example of what you can do using a CSS tooltip, feel free to get creative and produce your own! CSS powered tooltip. This is just an example of what you can do so feel free to get creative and produce your own!
Highlights
This is a highlight phrase. Use <span class="gkHighlight1">Your highlight phrase goes here!</span>.
This is a highlight phrase. Use <span class="gkHighlight2">Your highlight phrase goes here!</span>.
This is a highlight phrase. Use <span class="gkHighlight3">Your highlight phrase goes here!</span>.
This is a highlight phrase. Use <span class="gkHighlight4">Your highlight phrase goes here!</span>.
Code
Below is a sample of <pre> or <div class="gkCode1">
#wrapper {
position: relative;
float: left;
display: block;
}
Below is a sample of <div class="gkCode2">
position: relative;
float: left;
display: block;
}
Below is a sample of <div class="gkCode3"><h4>Name of your file</h4>Here goes your code</div>
File
#wrapper {position: relative;
float: left;
display: block;
}
Unordered lists
Types of unordered lists
|
<ul class="gkBullet1">
|
<ul class="gkBullet2">
|
<ul class="gkBullet3">
|
|
<ul class="gkBullet4">
|
<ul class="gkCircle1">
|
<ul class="gkCircle2">
|
|
<ul class="gkSquare1">
|
<ul class="gkSquare2">
|
<ul class="gkSquare3">
|
Ordered lists
Types of ordered list:
|
<ol class="gkRoman">
|
<ol class="gkDec">
|
<ol class="gkAlpha">
|
<ol class="gkDecimalLeadingZero">
|
<div class="gkNumber1"><p><span>here goes a number</span>and here text of element</p>
01 Element
02 Element
<div class="gkNumber2"><p><span>here goes a number</span>and here text of element</p>
01 Element
02 Element
Abbrs and acronyms
This is a sample of an abbreviation Dr. Use <abbr title="Here goes full word or phrase">here goes an abbreviation</abbr>
This is a sample of an acronym NATO. Use <acronym title="Here goes full phrase">here goes an acronym</abbr>
Definition lists
Below are samples of definition lists
<dl class="gkDef1"><dt>Here goes the word you're about to define</dt><dd>Here goes definition</dd></dl>
- Butter
- it is a dairy product made by churning fresh or fermented cream or milk. It is generally used as a spread and a condiment, as well as in cooking applications such as baking, sauce making, and frying. Butter consists of butterfat, water and milk proteins.
- Dairy milk
- is an opaque white liquid produced by the mammary glands of mammals (including monotremes). It provides the primary source of nutrition for newborn mammals before they are able to digest other types of food.
<dl class="gkDef2"><dt>Here goes the word you're about to define</dt><dd>Here goes definition</dd></dl>
- Butter
- it is a dairy product made by churning fresh or fermented cream or milk. It is generally used as a spread and a condiment, as well as in cooking applications such as baking, sauce making, and frying. Butter consists of butterfat, water and milk proteins.
- Dairy milk
- is an opaque white liquid produced by the mammary glands of mammals (including monotremes). It provides the primary source of nutrition for newborn mammals before they are able to digest other types of food.
<dl class="gkDef3"><dt>Here goes the word you're about to define</dt><dd>Here goes definition</dd></dl>
- Butter
- it is a dairy product made by churning fresh or fermented cream or milk. It is generally used as a spread and a condiment, as well as in cooking applications such as baking, sauce making, and frying. Butter consists of butterfat, water and milk proteins.
- Dairy milk
- is an opaque white liquid produced by the mammary glands of mammals (including monotremes). It provides the primary source of nutrition for newborn mammals before they are able to digest other types of food.
Legends
Legend
This is a sample legend note. Use <div class="gkLegend1"> <h4> Title </h4> <p>Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Integer urna. Aenean tristique. Fusce a neque. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus.</p> </div>.
Legend
This is a sample legend note. Use <div class="gkLegend2"> <h4> Title </h4> <p>Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Integer urna. Aenean tristique. Fusce a neque. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus.</p> </div>.
Legend
This is a sample legend note. Use <div class="gkLegend3"> <h4> Title </h4> <p>Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Integer urna. Aenean tristique. Fusce a neque. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus.</p> </div>.
Legend
This is a sample legend note. Use <div class="gkLegend4"> <h4> Title </h4> <p>Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Integer urna. Aenean tristique. Fusce a neque. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus.</p> </div>.
Legend
This is a sample legend note. Use <div class="gkLegend5"> <h4> Title </h4> <p>Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Integer urna. Aenean tristique. Fusce a neque. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus.</p> </div>.
Legend
This is a sample legend note. Use <div class="gkLegend6"> <h4> Title </h4> <p>Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Integer urna. Aenean tristique. Fusce a neque. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus.</p> </div>.
Legend
This is a sample legend note. Use <div class="gkLegend7"> <h4> Title </h4> <p>Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Integer urna. Aenean tristique. Fusce a neque. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus.</p> </div>.
Dropcaps
This is a sample text with Dropcap. Use <p> <span class="gkDropcap1">t</span> to make the first letter larger. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Vestibulum condimentum pulvinar justo, sed faucibus ligula feugiat ac. Morbi quis enim nulla, vel congue augue. Duis quis quam sed purus porta eleifend. Vivamus ullamcorper est id libero aliquam ullamcorper. Donec eget dignissim augue. Donec ante felis, aliquam ut consequat eget, lobortis dapibus risus. Aliquam laoreet enim et lectus ornare hendrerit. Aliquam rhoncus enim libero. Morbi aliquam, nibh mattis feugiat dapibus, nisi massa adipiscing justo, sit amet condimentum urna ipsum et lacus. Nam fermentum, eros quis ullamcorper convallis, libero mauris lacinia eros, sed tempus leo lorem vitae purus. Nunc a malesuada felis. Cras ultrices sapien eu nisi elementum non blandit urna sodales. Duis accumsan cursus massa, eu facilisis diam porta ut..</p>.
This is a sample text with Dropcap. Use <p> <span class="gkDropcap2">t</span> to make the first letter larger. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Vestibulum condimentum pulvinar justo, sed faucibus ligula feugiat ac. Morbi quis enim nulla, vel congue augue. Duis quis quam sed purus porta eleifend. Vivamus ullamcorper est id libero aliquam ullamcorper. Donec eget dignissim augue. Donec ante felis, aliquam ut consequat eget, lobortis dapibus risus. Aliquam laoreet enim et lectus ornare hendrerit. Aliquam rhoncus enim libero. Morbi aliquam, nibh mattis feugiat dapibus, nisi massa adipiscing justo, sit amet condimentum urna ipsum et lacus. Nam fermentum, eros quis ullamcorper convallis, libero mauris lacinia eros, sed tempus leo lorem vitae purus. Nunc a malesuada felis. Cras ultrices sapien eu nisi elementum non blandit urna sodales. Duis accumsan cursus massa, eu facilisis diam porta ut..</p>.
This is a sample text with Dropcap. Use <p class="gkDropcap3"> <span class="gkDropcap3">t</span> to make the first letter larger. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Vestibulum condimentum pulvinar justo, sed faucibus ligula feugiat ac. Morbi quis enim nulla, vel congue augue. Duis quis quam sed purus porta eleifend. Vivamus ullamcorper est id libero aliquam ullamcorper. Donec eget dignissim augue. Donec ante felis, aliquam ut consequat eget, lobortis dapibus risus. Aliquam laoreet enim et lectus ornare hendrerit. Aliquam rhoncus enim libero. Morbi aliquam, nibh mattis feugiat dapibus, nisi massa adipiscing justo, sit amet condimentum urna ipsum et lacus. Nam fermentum, eros quis ullamcorper convallis, libero mauris lacinia eros, sed tempus leo lorem vitae purus. Nunc a malesuada felis. Cras ultrices sapien eu nisi elementum non blandit urna sodales. Duis accumsan cursus massa, eu facilisis diam porta ut..</p>.
Floated blocks
Below are samples of text in which part of it is displayed in a separate block
<p> Here goes main part of the text <span class="gkBlockTextLeft">Block of text</span>rest of the text</p>
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Vestibulum condimentum pulvinar justo, sed faucibus ligula feugiat ac. Morbi quis enim nulla, vel congue augue. Duis quis quam sed purus porta eleifend.Lorem ipsum dolor sit amet, consectetur adipiscing elit. Vestibulum condimentum pulvinar justo, sed faucibus ligula feugiat ac. Morbi quis enim nulla, vel congue augue.Donec eget dignissim augue. Donec ante felis, aliquam ut consequat eget, lobortis dapibus risus. Aliquam laoreet enim et lectus ornare hendrerit. Aliquam rhoncus enim libero. Morbi aliquam, nibh mattis feugiat dapibus, nisi massa adipiscing justo, sit amet condimentum urna ipsum et lacus. Nam fermentum, eros quis ullamcorper convallis, libero mauris lacinia eros, sed tempus leo lorem vitae purus. Nunc a malesuada felis. Cras ultrices sapien eu nisi elementum non blandit urna sodales. Duis accumsan cursus massa, eu facilisis diam porta ut. Morbi cursus est vel velit hendrerit dictum.
<p> Here goes main part of the text <span class="gkBlockTextRight">Block of text</span>rest of the text</p>
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Vestibulum condimentum pulvinar justo, sed faucibus ligula feugiat ac. Morbi quis enim nulla, vel congue augue. Duis quis quam sed purus porta eleifend.Lorem ipsum dolor sit amet, consectetur adipiscing elit. Vestibulum condimentum pulvinar justo, sed faucibus ligula feugiat ac. Morbi quis enim nulla, vel congue augue.Donec eget dignissim augue. Donec ante felis, aliquam ut consequat eget, lobortis dapibus risus. Aliquam laoreet enim et lectus ornare hendrerit. Aliquam rhoncus enim libero. Morbi aliquam, nibh mattis feugiat dapibus, nisi massa adipiscing justo, sit amet condimentum urna ipsum et lacus. Nam fermentum, eros quis ullamcorper convallis, libero mauris lacinia eros, sed tempus leo lorem vitae purus. Nunc a malesuada felis. Cras ultrices sapien eu nisi elementum non blandit urna sodales. Duis accumsan cursus massa, eu facilisis diam porta ut. Morbi cursus est vel velit hendrerit dictum.
<p> Here goes main part of the text <span class="gkBlockTextCenter">Block of text</span>rest of the text</p>
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Vestibulum condimentum pulvinar justo, sed faucibus ligula feugiat ac. Morbi quis enim nulla, vel congue augue. Duis quis quam sed purus porta eleifend.Lorem ipsum dolor sit amet, consectetur adipiscing elit. Vestibulum condimentum pulvinar justo, sed faucibus ligula feugiat ac. Morbi quis enim nulla, vel congue augue.Donec eget dignissim augue. Donec ante felis, aliquam ut consequat eget, lobortis dapibus risus. Aliquam laoreet enim et lectus ornare hendrerit. Aliquam rhoncus enim libero. Morbi aliquam, nibh mattis feugiat dapibus, nisi massa adipiscing justo, sit amet condimentum urna ipsum et lacus. Nam fermentum, eros quis ullamcorper convallis, libero mauris lacinia eros, sed tempus leo lorem vitae purus. Nunc a malesuada felis. Cras ultrices sapien eu nisi elementum non blandit urna sodales. Duis accumsan cursus massa, eu facilisis diam porta ut. Morbi cursus est vel velit hendrerit dictum.
Other span blocks
This is a sample pin note. Use <span class="gkClear">Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Integer urna. Aenean tristique. Fusce a neque. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. </span>
This is a sample pin note. Use <span class="gkClear-1">Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Integer urna. Aenean tristique. Fusce a neque. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. </span>
This is a sample pin note. Use <span class="gkClear-2">Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Integer urna. Aenean tristique. Fusce a neque. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. </span>
This is a sample pin note. Use <span class="gkColor">Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Integer urna. Aenean tristique. Fusce a neque. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. </span>
This is a sample pin note. Use <span class="gkColor-1">Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Integer urna. Aenean tristique. Fusce a neque. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. </span>
This is a sample pin note. Use <span class="gkColor-2">Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Integer urna. Aenean tristique. Fusce a neque. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. </span>
This is a sample pin note. Use <span class="gkColor-3">Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Integer urna. Aenean tristique. Fusce a neque. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. </span>
This is a sample pin note. Use <span class="gkColor-4">Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Integer urna. Aenean tristique. Fusce a neque. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. </span>
This is a sample pin note. Use <span class="gkColor-5">Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Integer urna. Aenean tristique. Fusce a neque. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. </span>
This is a sample pin note. Use <span class="gkColor-6">Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Integer urna. Aenean tristique. Fusce a neque. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. </span>
This is a sample pin note. Use <span class="gkColor-7">Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Integer urna. Aenean tristique. Fusce a neque. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. </span>
Blockquotes
This is a sample quote text. Use < blockquote > Your quoted text goes here!< /blockquote >
This is a sample quote text. Use< blockquote><div class="gkBlockquote1"><div> Your quoted text goes here!< /div>< /div>< /blockquote >
This is a sample quote text. Use< blockquote><div class="gkBlockquote2"><div> Your quoted text goes here!< /div>< /div>< /blockquote >
This is a sample quote text. Use< blockquote><div class="gkBlockquote3"><div> Your quoted text goes here!< /div>< /div>< /blockquote >
This is a sample quote text. Use< blockquote><div class="gkBlockquote4"><div> Your quoted text goes here!< /div>< /div>< /blockquote >Tables
Table Header (thead) Table Footer (tfoot) Column 1 Column 2 Cell 3 - part of tbody Cell 4 - part of tbody Cell 5 - part of tbody Cell 6 - part of tbody Cell 7 - part of tbody Cell 8 - part of tbody
Table Header (thead) Table Footer (tfoot) Column 1 Column 2 Cell 1 - part of tbody Cell 2 - part of tbody Cell 3 - part of tbody Cell 4 - part of tbody Cell 5 - part of tbody Cell 6 - part of tbody
Template additional styles
In order to get the video you have to use code like this:
<a class="gk_video_frame" href="http://www.vimeo.com/16274294" rel="mediabox[720 410]">
<img src="/images/stories/demo/demo_video_1.png" border="0" alt="Video 1" />
<span class="gk_vframe">Frame</span>
<span class="gk_voverlay">Overlay</span>
Watch the video
</a>
As a href attribute you set the video address. In the rel attribute you can specify the video size. Image element is the thumbnail in the frame.
You can also create a blocks with icons. The structure is always similar - you have to change only second class near gk_block:
<div class="gk_block tablet">
<h3><a href="#">Mobile Ready</a></h3>
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Cras quis erat elit. Donec pretium condimentum</p>
</div>
Available blocks styles with classes:
android
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Cras quis erat elit. Donec pretium condimentum
blackberry
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Cras quis erat elit. Donec pretium condimentum
calendar
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Cras quis erat elit. Donec pretium condimentum
chat
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Cras quis erat elit. Donec pretium condimentum
clock
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Cras quis erat elit. Donec pretium condimentum
cog
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Cras quis erat elit. Donec pretium condimentum
firefox
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Cras quis erat elit. Donec pretium condimentum
info
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Cras quis erat elit. Donec pretium condimentum
mac
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Cras quis erat elit. Donec pretium condimentum
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Cras quis erat elit. Donec pretium condimentum
mobilephone
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Cras quis erat elit. Donec pretium condimentum
phone
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Cras quis erat elit. Donec pretium condimentum
recycledbag
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Cras quis erat elit. Donec pretium condimentum
shoppingcart
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Cras quis erat elit. Donec pretium condimentum
tablet
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Cras quis erat elit. Donec pretium condimentum
user
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Cras quis erat elit. Donec pretium condimentum
In Adobe's own words:"Adobe® AIR® is a cross-operating system runtime that lets developers combine HTML, Ajax, Adobe Flash®, and Adobe Flex® technologies to deploy rich Internet applications (RIAs) on the desktop."
The outcome of this combination of technologies is that developers can design and render quite beautiful user interfaces cross platform. For us desktop Linux users it is nice to have
an additional avenue for obtaining and running attractive desktop applications.Examples of great Adobe air applications are Adobe.com for My Desktop, TweetDeck and the Times Reader. You can download these applications and many more at the Adobe Marketplace.
The easiest way to install Adobe Air on Fedora 12 is to download the latest build from Adobe, click here.
Once you have downloaded the .bin file do the following at the shell:
su - chmod +x AdobeAIRInstaller.bin ./AdobeAIRInstaller.binOnce you have Air installed, there is a slight tweak you will have to do to get it running on Fedora 12, it is related to the security certificates. This can be remedied in one simple line at the shell prompt as root.
su - for c in /etc/opt/Adobe/certificates/crypt/*.0; do aucm -n $(basename $c) -t true; doneWhat this line is doing is using the aucm which is the Adobe Unix certificate manager to set the certificates installed as trusted.
You will now be able to go to the Adobe Marketplace and download and run Air applications without any issues.
Enjoy!
DRBD:
DRBD (Distributed Replicated Block Device) forms the storage redundancy portition of a HA cluster setup. Explained in basic terms DRBD provides a means of achieving RAID 1 behavoir over a network, where whole block devices are mirrored accross the network.
To start off you will need 2 indentically sized raw drives or partitions. Many how-to's on the internet assume the use of whole drives, of course this will be better performance, but if you are simply getting familar with the technology you can repartition existing drives to allow for two eqaully sized raw partitions, one on each of the systems you will be using.
There are 3 DRBD replication modes:
• Protocol A: Write I/O is reported as completed as soon as it reached local disk and local TCP send buffer
• Protocol B: Write I/O is reported as completed as soon as it reached local disk and remote TCP buffer cache
• Protocol C: Write I/O is reported as completed as soon as it reached both local and remote disks.
If we were installing the HA cluster on a slow LAN or if the geogrphical seperation of the systems involved was great, then I recommend you opt for asyncronous mirroring (Protocol A) where the notifcation of a completed write operation occurs as soon as the local disk write is performed. This will greatly improve performance.
As we are setting up our HA cluster connected via a fast LAN, we will be using DRBD in fully syncronous mode, protocol C.
Protocol C involves the file system on the active node only being notified that the write operation was finished when the block is written to both disks of the cluster. Protocol C is the most commonly used mode of DRBD.
/etc/drbd.conf
global { usage-count yes; }
common { syncer { rate 10M; } }
resource r0 {
protocol C;
net {
max-buffers 2048;
ko-count 4;
}
on bailey {
device /dev/drbd0;
disk /dev/sda4;
address 192.168.1.125:7789;
meta-disk internal;
}
on giskard {
device /dev/drbd0;
disk /dev/sda3;
address 192.168.1.127:7789;
meta-disk internal;
}
}
drbd.conf explained:
Global section, usage-count. The DRBD project keeps statistics about the usage of DRBD versions. They do this by contacting a HTTP server each time a new DRBD version is installed on a system. This can be disabled by setting usage-count no;.
The common seciton contains configurations inhereted by all resources defined.
Setting the syncronisation rate, this is accoimplished by going to the syncer section and then assigning a value to the rate setting. The syncronisation rate refers to rate in which the data is being mirrored in the background. The best setting for the syncronsation rate is related to the speed of the network with which the DRBD systems are communicating on. 100Mbps ethernet supports around 12MBps, Giggabit ethernet somewhere around 125MBps.
in the configuration above, we have a resource defined as r0, the nodes are configured in the "on" host subsections.
"Device" configures the path of the logical block device that will be created by DRBD
"Disk" configures the block device that will be used to store the data.
"Address" configures the IP address and port number of the host that will hold this DRBD device.
"Meta-disk" configures the location where the metadata about the DRBD device will be stored.
You can set this to internal and DRBD will use the physical block device to store the information, by recording the metadata within the last sections of the disk.
Once you have created your configuration file, you must conduct the following steps on both the nodes.
Create device metadata.
$ drbdadm create-md r0
v08 Magic number not found
Writing meta data...
initialising activity log
NOT initialized bitmap
New drbd meta data block sucessfully created.
success
Attach the backing device.
$ drbdadm attach r0
Set the syncronisation parameters.
$ drbdadm syncer r0
Connect it to the peer.
$ drbdadm connect r0
Run the service.
$ service drbd start
Heartbeat:
Heartbeat provides the IP redundancy and the service HA functionailty.
On the failure of the primary node the VIP is assigned to the secondary node and the services configured to be HA are started on the secondary node.
Heartbeat configuration:
/etc/ha/ha.conf
## /etc/ha.d/ha.cf on node1
## This configuration is to be the same on both machines
## This example is made for version 2, comment out crm if using version 1
// replace the node variables with the names of your nodes.
crm no
keepalive 1
deadtime 5
warntime 3
initdead 20
bcast eth0
auto_failback yes
node bailey
node giskard
/etc/ha.d/authkeys
// The configuration below set authentication off, and encryption off for the authentication of nodes and their packets.
//Note make sure the authkeys file has the correct permisisions chmod 600
## /etc/ha.d/authkeys
auth 1
1 crc
/etc/ha.d/haresources
//192.168.1.40 is the VIP (Virtual IP) assigned to the cluster.
//the "smb" in the configuration line represents the service we wish to make HA
// /devdrbd0 represents the resource name you configured in the drbd.conf
## /etc/ha.d/haresources
## This configuration is to be the same on both nodes
bailey 192.168.1.40 drbddisk Filesystem::/dev/drbd0::/drbdData::ext3 smb
auth sufficient pam_krb5.so try_first_pass
auth sufficient pam_unix.so shadow nullok try_first_pass
account required pam_unix.so broken_shadow
account [default=bad success=ok user_unknown=ignore] pam_krb5.so