search for: pvmove

Are there any ways to improve/manage the speed of pvmove? Man doesn't show any documented switches for priority scheduling. Iostat shows the system way underutilized even though the lv whose pe's are being migrated is continuously being written (slowly) to. Thanks! jlc

Hi All. Looking for some guidance/experience with LVM and pvmove. I have a LUN/PV being presented from a iscsi SAN. The LUN/PV is presented to 5 servers as a shared VG they all have LV's they use for data, they are all connected via iSCSI. As the SAN I am using is being replaced I need to move onto a new unit. My migration strategy at this time is to 1....

Dear All, I plan to replace an error disk that is part of an LV. from LVM how-to it could be done with using pvmove to move all PE from old disk to new disk.But the howto also said that pvmove is slow. Anyone has experience using pvmove on 2TB disk? Is it possible to make all PE on the old disk empty so I don't have to do pvmove (assuming that I can make a free space >= 2TB). Thank you in advance Regards...

----- "Ben M." <centos at rivint.com> wrote: > Does this appear to be a sound procedure? I have one inline question. I read your version of the procedure and it looks like you want to skip the pvmove. That's fine, but it means more downtime (an unreliable estimate is one minuted per GB). In that case, you don't even need the snapshot. You won't need a point in time copy if you are copying from a stable source. > 1. Shutdown domU source (source lvname = win2k8-source) which is ne...

Dear all, I have a 4,1TB Logical volume consist of four disks with size of 2TB, 1TB, 1TB, and 500GB. The LV currently full. I plan to change the 1Tb disks and 500Gb disks. I plan to remove one 1TB disk or the 500GB so that I can replace it with 2TB disk. most LVM tutorial ask to use pvmove to move phisical extent to the new disk. The problem is that I have no SATA port left so that I can't move PE to the new disk. How to migrate the data safely so that I can replace the disk? Thank you in advance regards, -- ----- Muhammad Panji

...gt; instance and a web server instance, in anticipation of an "encrypted at > rest" directive coming down from management. How about: Add temporary storage, encrypted, set as a PV, add to VG. Rebuild initramfs, and reboot, confirming that it properly unlocks the storage as expected. pvmove, delete internal PV and replace with encrypted PV, pvmove back? You'd hope that'd be quite tolerant of being interrupted in the middle. If you're happy that works, the same recipe should work without a reboot. jh

...t to do a snapshot of an existing LV. Only way I've seen is to mount the to LV and: mount /dev/vg00/lv00 /mnt/orig mount /dev/vg00/lv01 /mnt/copy cd /mnt/orig tar cf - ./ |(cd /mnt/copy; tar xf - ) Is there a LV tool to do this? Or an option used with lvcreate, such as --autobackup? Or maybe pvmove, but that seems more for moving To LV from PV or vesa versa? Thanks in advance, Jesse Waters

...have quite a bit of experience with doing unspeakable things with LVM volumes. You really need to do that resizing in the context of moving everything to another disk. If it's a server that you don't want to take down for the time it takes for that procedure, you can do amazing things with pvmove while your system continues to run, but you still need another disk to hold those volumes temporarily. -- Bob Nichols "NOSPAM" is really part of my email address. Do NOT delete it.

...? If / and /home are on xfs you can't shrink anyway.? I'm not sure if ext4 can be shrunk while mounted (I seem to remember that it can't). > > If it's a server that you don't want to take down for the time it > takes for that procedure, you can do amazing things with pvmove while > your system continues to run, but you still need another disk to hold > those volumes temporarily. > As long as there is enough slack space in the volume group you can do this.? If there is no slack space you have real problems, especially with XFS (one reason I still use ext4...

Hi guys, I need to move an lvm based domU from one dom0 to another dom0. How do you guys do ths? xm save/restore doesnt have the option to specify lvm target as the storage. Thanks Chris _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users

Hello: I have set up a DAV file system on my apache server using these directives in ssl.conf: Alias /files /var/www/files <Directory /var/www/files> Dav On AuthType Basic AuthName "Filesystem access" AuthUserFile /var/www/files.passwd require valid-user Options Indexes </Directory> On my client machine (Windows XP SP3), I am able to add the https location

...riginal drive is a backup, until we confirm that the new drive is behaving well. Are these steps correct (and they should be without LVM) or is there something much easier and obvious that I'm missing? I could, I suppose, add the new parition into the original volume group, and do the 'pvmove' dance to get things over (as explained briefly in the LVM-HOWTO on Red Hat's site) but it wouldn't leave a bootable system on the original drive. Any suggestions would be greatly appreciated! TIA, Barry

https://bugzilla.samba.org/show_bug.cgi?id=10678 Summary: performance problem with lots of hard links? Product: rsync Version: 3.0.6 Platform: All OS/Version: All Status: NEW Severity: normal Priority: P5 Component: core AssignedTo: wayned at samba.org ReportedBy: Dave at Yost.com

...d PV (/dev/sdc1) cannot be accessed anymore. I would like to recover whatever left in the other 3 PVs (/dev/sda1, /dev/sdb1, and /dev/sdd1). I have tried with the following: 1. Removing the broken PV: # vgreduce --force vg_hosting /dev/sdc1 Physical volume "/dev/sdc1" still in use # pvmove /dev/sdc1 No extents available for allocation 2. Replacing the broken PV: I was able to create a new PV and restore the VG Config/meta data: # pvcreate --restorefile ... --uuid ... /dev/sdc1 # vgcfgrestore --file ... vg_hosting However, vgchange would give this error: # vgchange -a y devi...

I have existing systems with un-encrypted disks. I have tried unsuccessfully to encrypt them using LUKS. Has anyone out there been able to encrypt an existing system (after the fact, so to speak)? TIA -- Roger Wells, P.E. leidos 221 Third St Newport, RI 02840 401-847-4210 (voice) 401-849-1585 (fax) roger.k.wells at leidos.com

Do most people today have /boot on a separate partition, or do they (you) have it on the / partition ? -- Timothy Murphy gayleard /at/ eircom.net School of Mathematics, Trinity College, Dublin

Hi. I''m using Xen on RHEL cluster, and I have strange problems. I gave raw volumes from storage to Xen virtual machines. With windows, I have a problem that nodes don''t see the volume as same one.... for example: clusternode1# clusvcadm -d vm:winxp clusternode1# dd if=/dev/mapper/winxp of=/node1winxp clusternode2# dd if=/dev/mapper/winxp of=/node2winxp clusternode3# dd

I've replaced disks in a hardware RAID 1 with larger disks and enlarged the array. Now I have to find a way to tell LVM about the extra space. It seems there are two ways: 1. delete partition with fdisk and recreate a larger one. This is obviously a bit tricky if you do not want to lose data, I haven't investigated further yet. 2. create another partition on the disk, pvcreate another

...r whatever > | left in the other 3 PVs (/dev/sda1, /dev/sdb1, and /dev/sdd1). > | > | I have tried with the following: > | > | 1. Removing the broken PV: > | > | # vgreduce --force vg_hosting /dev/sdc1 > | Physical volume "/dev/sdc1" still in use > | > | # pvmove /dev/sdc1 > | No extents available for allocation > > > This would indicate that you don't have sufficient extents to move the > data off of this disk. If you have another disk then you could try > adding it to the VG and then moving the extents. > > | 2. Replacing th...

...9;re giving have to do with VMs. > Do you have some for straight-on-the-server, non-VM cases? I've used LVM on servers with hot-swap drives to migrate to new storage without downtime a number of times. Add new drives to the system, configure RAID (software or hardware), pvcreate, vgextend, pvmove, vgreduce, and pvremove (and maybe a lvextend and resize2fs/xfs_growfs). Never unmounted a filesystem, just some extra disk I/O. Even in cases where I had to shutdown or reboot a server to get drives added, moving data could take a long downtime, but with LVM I can live-migrate from place to place...