This website runs in a virtual machine under vmware server. It is clustered between two servers using heartbeat and DRBD.
When VMware server starts up a virtual machine it generates a uuid (unique id) based on the machine it is running on and stores this in the .vmx file.
When heartbeat switches from slave to master, it will start VMware server (which is setup as a resource in the haresources file).
Virtual machines that you want started automatically when you start VMware server will not start because the uuid changes between the master and backup systems. To get around this problem always do the following:
- edit the .vmx file and add the following line
uuid.action = "keep"
If this is not done then everytime you try to run the virtual machine on the backup system in your cluster, VMware server will complain that the virtual machine has been copied or moved and it will not start it.
- set the virtual machine to power off when vmware is stopped. Do not set this to "suspend" or it will not restart on the backup machine.
This will allow the virtual machine to start properly on the backup machine.
After an extended period of intense software development, we are pleased to announce the release of Recital 10 which is a milestone in our development efforts.
Recital 10 is comprised of major new versions of all of our products (which are all now Cluster Ready) as well as some new products, and a collection of open source technologies fully supported by ourselves to our customer base.
The Recital 10 release notes can be found here.
The Recital 10 release notes can be found here.
- Recital
A powerful scripting language with an embedded database used for developing desktop database applications on Linux and Unix.
- Recital Server
A cross-platform SQL database and application server.
- Recital Web
A server-side scripting language with an embedded SQL database for creating web 2.0 web applications.
In Recital 10, you can declare anonymous classes and call anonymous methods in these classes.
// declare some simple procedures
proc display(cArg)
echo "display=" + cArg
endproc
proc show(cArg)
echo "show=" + cArg
endproc
// create an object based on an anonymous class
myobj = new object()
// add some properties
myobj["name"] = "barry"
myobj["company"] = "recital"
// now declare an anonymous method
myobj["mymethod"] = display
// call the method
myobj.mymethod("hello world") // displays "display=hello world"
// redeclare the method
myobj["mymethod"] = show
// call the method
myobj.mymethod("hello world") // displays "show=hello world"
Where this becomes particularly useful is when you have a procedure that calls anonymous methods in order to process data. This technique can be used to call anonymous procedures in your code.
proc processdata(oArg)
oArg.mymethod(oArg.name)
endproc
proc show(cArg)
echo "show=" + cArg
endproc
myobj = new object()
myobj["name"] = "barry"
myobj["mymethod"] = show
processdata(myobj) // displays "show=barry"
Recital 10 enhances the APPEND FROM command. The enhancement added the following syntax ;
APPEND FROM TYPE CSV <file-name.csv>The TYPE keyword has now been enhanced to support a comma separated values (CSV) format
TIP
The Compatibility Dialog settings are written to the compat.db file in <path>/conf - please ensure that the user setting the compatibility settings has write access to this file and directory. Once these settings are written, the dialog will not be displayed unless SET COMPATIBLE is issued.
The Compatibility Dialog settings are written to the compat.db file in <path>/conf - please ensure that the user setting the compatibility settings has write access to this file and directory. Once these settings are written, the dialog will not be displayed unless SET COMPATIBLE is issued.
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When stress testing our loadbalancer, i was unable to get more than 20 reliable ssh connections. The following error would be reported.
ssh_exchange_identification: Connection closed by remote host
The resolution for this is quite simple.
Edit the /etc/ssh/sshd_config file and increase the MaxStartups. On my server i set this to 200.
Edit /etc/sysctrl.conf and add the following line:
net.core.netdev_max_backlog = 3000
Then apply this change:
# sysctl -p
Platforms supported
- Intel® / AMD™ 32 bit Linux
- Intel® / AMD™ 64 bit Linux
- HP PA-RISC HP-UX® 10.20 and above
- Sun® SPARC Solaris™ 8 and above
- HP Alpha OpenVMS 7.2-1 and above
- SCO® OpenServer 5.0.5 and above
- Sun® Intel® Solaris™ 10 and above
- IBM AIX® 4.3 and above
- HP Integrity OpenVMS 8.2-1 and above
- HP Intel® Itanium® HP-UX® 11.23 and above
- Mac OS X leopard 10.5 and above
Large File Support is available for Windows, Itanium HP-UX and Linux.
When the node is clicked set editable to false. Set editable to true in the double-click event handler.
// the click event handler
private function onclick_sourcetree(e:Event):void {
yourTree.editable = false;
}
// the doubleclick event handler
private function ondoubleclick_sourcetree(e:Event):void {
yourTree.editable = true;
yourTree.editedItemPosition = {columnIndex:0, rowIndex:sourceTree.selectedIndex};
}