Hi, Is it possible to use EVMS instead of LVM as volume manager? Regards, Matthijs ter Woord _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
"Matthijs ter Woord" <matthijsterwoord@gmail.com> wrote on 04/24/2006 10:48:24 AM:> Hi, > > Is it possible to use EVMS instead of LVM as volume manager? > > Regards, > > Matthijs ter WoordOthers have experimented with EVMS under Xen and to my knowledge have it working. A few have hit issues along the way. See the evms-devel archives: http://sourceforge.net/mailarchive/forum.php?forum_id=2003 Search for "Xen". Make sure you are using EVMS version 2.5.5. There were some fixes to the way EVMS finds disks. Certain ioclts to disks are not supported in a paravirtualized guest, which caused versions of EVMS prior to 2.5.5 to not find disks. Steve D. _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
On Monday 24 April 2006 12:37 pm, Steve Dobbelstein wrote:> Others have experimented with EVMS under Xen and to my knowledge have iti guess original question was about using EVMS in dom0 to create the ''partitions'' holding the domU''s block devices; not using EVMS under Xen. haven''t tried it, but i think there''s nothing in Xen that assumes LVM, just uses the block devices provided by the mapper module. in that case, it should just work, since EVMS uses the very same kernel module. another issue would be on a shared storage: there''s CLVM to make the LVM admin tools work peacefully between several hosts; but i don''t know if there''s something similar for EVMS -- Javier _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Javier Guerra <javier@guerrag.com> wrote on 04/24/2006 02:37:22 PM:> On Monday 24 April 2006 12:37 pm, Steve Dobbelstein wrote: > > Others have experimented with EVMS under Xen and to my knowledge haveit> > i guess original question was about using EVMS in dom0 to create the > ''partitions'' holding the domU''s block devices; not using EVMS under Xen. > > haven''t tried it, but i think there''s nothing in Xen that assumes LVM,just> uses the block devices provided by the mapper module. in that case, it > should just work, since EVMS uses the very same kernel module.You are correct.> another issue would be on a shared storage: there''s CLVM to make theLVMadmin> tools work peacefully between several hosts; but i don''t know if there''s > something similar for EVMSEVMS has support for working in a clustered environment, e.g., on Linux-HA, such that it coordinates any changes to shared storage so that they are seen on all nodes in the cluster. EVMS will also assist you in installing a clustered file system, such as OCFS, on a shared volume. Steve D. _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
> Is it possible to use EVMS instead of LVM as volume manager?Should be. You can use any block device dom0 can access for storing domU filesystems, including EVMS, LVM, network block devices, ramdisks, and anything else you can think of. Cheers, Mark -- Dave: Just a question. What use is a unicyle with no seat? And no pedals! Mark: To answer a question with a question: What use is a skateboard? Dave: Skateboards have wheels. Mark: My wheel has a wheel! _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Am Montag 24 April 2006 17:48 schrieb Matthijs ter Woord:> Is it possible to use EVMS instead of LVM as volume manager?Yes. Working beautifully for us. Others have noted that you need EVMS 2.5.5 (which is the latest version ATM), but I''ve had Xen 3 DomUs on EVMS storage from 2.5.2 (thereabouts) onwards, and only snapshots were flaky sometimes (but the problem lay elsewhere, gcc produces broken code with some optimization settings, specifically -Os; the base system is a Gentoo system, so this matters...). --- Heiko. _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users