Hi all, I was wondering if anyone might be able to speak about using IBM's GPFS filesystem as a means of storing virtual guests in a clustered environment with CentOS as the nodes and KVM as the hypervisor? I'm looking at using IBM's TSM software for archiving data from disk to tape. This requires buying a license for GPFS which is used in conjunction with TSM but can also be used as a clustered filesystem as well. As I understand it, GPFS can work with CentOS so long as you're using the right kernel. Is anyone out there using CentOS+GPFS for their virtualization environment? many thanks in advance, ...adam -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.centos.org/pipermail/centos-virt/attachments/20101110/21392edd/attachment-0003.html>
I like and use ZFS, but for some reason, a vm guest?s file (raw, qcow2, etc) stored on ZFS won?t run. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.centos.org/pipermail/centos-virt/attachments/20101110/4b875402/attachment-0003.html>
Adam Wead <amsterdamos at ...> writes:> > Hi all,I was wondering if anyone might be able to speak about using IBM's GPFSfilesystem as a means of storing virtual guests in a clustered environment with CentOS as the nodes and KVM as the hypervisor?> I'm looking at using IBM's TSM software for archiving data from disk to tape.?This requires buying a license for GPFS which is used in conjunction with TSM but can also be used as a clustered filesystem as well.? As I understand it, GPFS can work with CentOS so long as you're using the right kernel.Is anyone out there using CentOS+GPFS for their virtualization environment?many thanks in advance,...adam> > _______________________________________________ > CentOS-virt mailing list > CentOS-virt at ... > http://lists.centos.org/mailman/listinfo/centos-virt >Hi Adam, I use GPFS as my filesystem for my Centos-Xenvirtual environment. The Virtual servers are converted Compute nodes, running Centos 5.4 with Xen 3.4.2 and have Infiniband connectivity to the NSD servers. The VM's all live on the GPFS filesystem. This has worked pretty well, the disk performance of the VM's has been good when using the GPL paravirt drivers (my VM's are windows server 2003). I'm currently in the process of trying to re-setup the infrastructure using stateless Centos+KVM Virtual servers instead, but its too early to tell if its working or not. Good luck, Evan.
Adam Wead wrote:> Hi all, > > I was wondering if anyone might be able to speak about using IBM's GPFS > filesystem as a means of storing virtual guests in a clustered > environment with CentOS as the nodes and KVM as the hypervisor?Why would so much people use a clusterfs for Virtualization ? Just use lvm and a logical volumes for your guests. No filesystem overhead and better performances. -- -- Fabian Arrotin
Hi Adam, GPFS nodes can be licensed in two different ways. As a node with storage locally attached (called NSDs), or as a client node that connects to NSD servers. My Virtual servers are client nodes, and thus have an appropriate client license (these are cheap). They connect via GPFS's RDMA over Infiniband to my GPFS NSD servers which are a much more expensive license. The purpose of me doing it this way was to let me use storage already allocated to GPFS for my cluster without having to dedicate any luns to Virtual servers. Cheers, Evan.>Hi Evan, > >Thanks for the response. Just out of curiosity, do you have to pay the >extra licensing costs for each CentOS node? > >best, > >...adamThis message and any attachments contain information that may be RMS Inc. confidential and/or privileged. If you are not the intended recipient (or authorized to receive for the intended recipient), and have received this message in error, any use, disclosure or distribution is strictly prohibited. If you have received this message in error, please notify the sender immediately by replying to the e-mail and permanently deleting the message from your computer and/or storage system.