IOzone lets you benchmark your filesystem performance, seeing how well record IO occurs for files of various sizes. With IOzone you can see more detailed information than the read, write, and rewrite figures that Bonnie reports. IOzone is great at detecting areas where file IO might not be performing as well as expected.
We run a big share of Xen virtual servers spanned over multiple servers and if you want to use the full or best capability of Xen, I would suggest LVM (Logical Volume Manager), it makes life a lot easier, especially for those who do not run a RAID setup (We run RAID10 on all VM nodes) as you can split the partition over multiple hard drives. I’m not going to cover setting up the LVM as there are loads of tutorials on how to do that but I will rather cover the best way to migrate a LVM volume.
Is it a bug or a feature that the solaris iscsi initiator isn't able to connect to an iscsi target on the same machine, using either the 127.0.0.1 localhost address or the machine's own ip address?
n the event that something happens to a Xen virtual machine (VM) that prevents you from starting it, it's a good practice to have the virtual machine storage back end mounted in the Linux file system of the Xen-based server. By doing so, you'll be able to repair the VM quickly and painlessly. In this tip, I'll cover how to do this for physical devices that are used as storage back ends.
Red Hat Cluster Suite is a collection of technologies working together to provide data integrity and the ability to maintain application availability in the event of a failure. Administrators can deploy enterprise cluster solutions using a combination of hardware redundancy along with the failover and load-balancing technologies in Red Hat Cluster Suite.