I'm curious to hear what other comments arise, as we're analyzing a production setup shortly.
On Sun, Jun 1, 2014 at 10:11 PM, <combus...@archlinux.us> wrote: > I need to scratch gluster off because setup is based on CentOS 6.5, so > essential prerequisites like qemu 1.3 and libvirt 1.0.1 are not met. Gluster would still work with EL6, afaik it just won't use libgfapi and instead use just a standard mount. > > Any info regarding FC storage domain would be appreciated though. > > Thanks > > Ivan > > On Sunday, 1. June 2014. 11.44.33 combus...@archlinux.us wrote: >> Hi, >> >> I have a 4 node cluster setup and my storage options right now are a FC >> based storage, one partition per node on a local drive (~200GB each) and a >> NFS based NAS device. I want to setup export and ISO domain on the NAS and >> there are no issues or questions regarding those two. I wasn't aware of any >> other options at the time for utilizing a local storage (since this is a >> shared based datacenter) so I exported a directory from each partition via >> NFS and it works. But I am little in the dark with the following: >> >> 1. Are there any advantages for switching from NFS based local storage to a >> Gluster based domain with blocks for each partition. I guess it can be only >> performance wise but maybe I'm wrong. If there are advantages, are there any >> tips regarding xfs mount options etc ? >> >> 2. I've created a volume on the FC based storage and exported it to all of >> the nodes in the cluster on the storage itself. I've configured >> multipathing correctly and added an alias for the wwid of the LUN so I can >> distinct this one and any other future volumes more easily. At first I >> created a partition on it but since oVirt saw only the whole LUN as raw >> device I erased it before adding it as the FC master storage domain. I've >> imported a few VM's and point them to the FC storage domain. This setup >> works, but: >> >> - All of the nodes see a device with the alias for the wwid of the volume, >> but only the node wich is currently the SPM for the cluster can see logical >> volumes inside. Also when I setup the high availability for VM's residing >> on the FC storage and select to start on any node on the cluster, they >> always start on the SPM. Can multiple nodes run different VM's on the same >> FC storage at the same time (logical thing would be that they can, but I >> wanted to be sure first). I am not familiar with the logic oVirt utilizes >> that locks the vm's logical volume to prevent corruption. >> >> - Fdisk shows that logical volumes on the LUN of the FC volume are >> missaligned (partition doesn't end on cylindar boundary), so I wonder if >> this is becuase I imported the VM's with disks that were created on local >> storage before and that any _new_ VM's with disks on the fc storage would >> be propperly aligned. >> >> This is a new setup with oVirt 3.4 (did an export of all the VM's on 3.3 and >> after a fresh installation of the 3.4 imported them back again). I have >> room to experiment a little with 2 of the 4 nodes because currently they >> are free from running any VM's, but I have limited room for anything else >> that would cause an unplanned downtime for four virtual machines running on >> the other two nodes on the cluster (currently highly available and their >> drives are on the FC storage domain). All in all I have 12 VM's running and >> I'm asking on the list for advice and guidance before I make any changes. >> >> Just trying to find as much info regarding all of this as possible before >> acting upon. >> >> Thank you in advance, >> >> Ivan > > _______________________________________________ > Users mailing list > Users@ovirt.org > http://lists.ovirt.org/mailman/listinfo/users _______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
