Today I have completed my first ever Citrix certification .
Ultimately I want to achieve “ Citrix Certified Enterprise Engineer (CCEE) for Virtualization ”
Now to reach here I have to finish followings
Saturday, July 31, 2010
Friday, July 30, 2010
Adjusting Dom0 Memory Settings on XenServer5.5
• The “dom0_mem=2940M” change gives more memory to dom0 which means that it can better handle large numbers of VMs. After changing this setting and rebooting, you then need to instruct dom0 to consume all of the memory allocated to it.
• On XenServer 5.5, including updates 1 and 2, the following sequence of commands can be used to achieve this:
. /etc/xensource-inventory
staticmax=`xe vm-param-get uuid=$CONTROL_DOMAIN_UUID param-name=memory-static-max`
echo staticmax=$staticmax
xe vm-param-set uuid=$CONTROL_DOMAIN_UUID memory-dynamic-max=$staticmax
xe vm-memory-target-set uuid=$CONTROL_DOMAIN_UUID target=$staticmax
You can confirm it worked by examining the contents of /proc/xen/balloon. The sum of 'Current allocation', 'Low-mem balloon' and 'High-mem balloon' should be equal to (or be pretty close to) the value you specified in /boot/extlinux.conf. (Usually the latter two of these parameters are zero.)
You only need to execute those commands once. The values you set for the dom0 memory target are saved in the xapi database which persists across reboots.
• There are some (rare) circumstances in which XenServer adjusts the memory target automatically (adds more memory to the host), but these should not affect you because you have set the target as high as static-max.
This means that if you want to go back to the old behavior, with a standard-sized dom0, you must reverse your changes – rebooting does not revert your configuration. If you undo the edits to /boot/extlinux.conf and reboot, executing the same commands should have the effect of causing dom0 to revert to 752 MiB.
Caution! The default value for the “dom0_mem” parameter is 752 MB. There is a historic reason for this value. It may be that on some machines going above this value causes poor performance.
Source :CTX124259
• On XenServer 5.5, including updates 1 and 2, the following sequence of commands can be used to achieve this:
. /etc/xensource-inventory
staticmax=`xe vm-param-get uuid=$CONTROL_DOMAIN_UUID param-name=memory-static-max`
echo staticmax=$staticmax
xe vm-param-set uuid=$CONTROL_DOMAIN_UUID memory-dynamic-max=$staticmax
xe vm-memory-target-set uuid=$CONTROL_DOMAIN_UUID target=$staticmax
You can confirm it worked by examining the contents of /proc/xen/balloon. The sum of 'Current allocation', 'Low-mem balloon' and 'High-mem balloon' should be equal to (or be pretty close to) the value you specified in /boot/extlinux.conf. (Usually the latter two of these parameters are zero.)
You only need to execute those commands once. The values you set for the dom0 memory target are saved in the xapi database which persists across reboots.
• There are some (rare) circumstances in which XenServer adjusts the memory target automatically (adds more memory to the host), but these should not affect you because you have set the target as high as static-max.
This means that if you want to go back to the old behavior, with a standard-sized dom0, you must reverse your changes – rebooting does not revert your configuration. If you undo the edits to /boot/extlinux.conf and reboot, executing the same commands should have the effect of causing dom0 to revert to 752 MiB.
Caution! The default value for the “dom0_mem” parameter is 752 MB. There is a historic reason for this value. It may be that on some machines going above this value causes poor performance.
Source :CTX124259
Step by Step guide for configuring EMC CLARiiON CX4 on XenServer
Today Citrix has released white paper which describe every possible way of configuring EMC Clariion on XenServer.
Thursday, July 29, 2010
How to install Xen tool on Linux VM
After installing linux vm follow these steps to install Xen tool
Increase a VM memory though supported memory on Xen host is different
I want to configure VM for 48 GB though it support 32GB on a Xen Server host. Can I do it?
Yeah you can but it is unsupported feature. In order to do it
run following command on host
Xe vm-param-set memory-static-max=48GiB uuid=
Yeah you can but it is unsupported feature. In order to do it
run following command on host
Xe vm-param-set memory-static-max=48GiB uuid=
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