similar to: LVM thinpool snapshots broken in 6.5?

Hi, I'm trying to create a kickstart file that uses a thinly provisioned lvm volume as root but I've run into trouble. I installed a System manually using this option and this is the anaconda file produced: part /boot --fstype="xfs" --ondisk=vda --size=500 part pv.10 --fstype="lvmpv" --ondisk=vda --size=7691 volgroup centos_centos7 --pesize=4096 pv.10 logvol

Hello, as usual, I'm few years behind trends so I have learned about LVM thin volumes recently and I especially like that your volumes can be "sparse" - that you can have 1TB thin volume on 250GB VG/thin pool. Is it somehow possible to use that with libvirt? I have found this post from 2014: https://www.redhat.com/archives/libvirt-users/2014-August/msg00010.html which says

Hi, I have a question, let''s say I have a zvol named vol1 which is a clone of a snapshot of another zvol (its origin property is tank/myvol at mysnap). If I send this zvol to a different zpool through a zfs send does it send the origin too that is, does an automatic promotion happen or do I end up whith a broken zvol? Best regards. Maurilio. -- This message posted from

Hi, Is it possible to create a storage pool based on an LVM thin pool? I read a recent bugzilla but the problem there was that the storage-pool became unusable AFTER creating a thinpool which is a different case. Thanks, Jorge

Hi, I've noticed huge write amplification problem with thinly provisioned logical volumes and I wondered if anyone can explain why it happens and if and how can be fixed. The behavior is the same on Centos 6.8 and Centos 7.2. I have a NVME card (Intel DC P3600 -2 TB) on which I create a thinly provisioned logical volume: pvcreate /dev/nvme0n1 vgcreate vgg /dev/nvme0n1 lvcreate

On Fri, Jun 26, 2015 at 10:51 AM, Gordon Messmer <gordon.messmer at gmail.com> wrote: >> , or alternatively making the LVs >> redundant after install is a single command (each) and you can choose >> whether it should be mere mirroring or some MD manged RAID level (modulo >> the LVM RAID MD monitoring issue). > > > I hadn't realized that. That's an

Hello, this is my first time posting on this mailing list. I wanted to suggest a addition to the qemu hook. I will explain it through my own use case. I use a shared LVM storage as a volume pool between my nodes. I use lvmlockd in sanlock mode to protect both LVM metadata corruption and concurrent volume mounting. When I run a VM on a node, I activate the desired LV with exclusive lock

If there were a ?zfs send? datastream saved someplace, is there a way to verify the integrity of that datastream without doing a ?zfs receive? and occupying all that disk space? I am aware that ?zfs send? is not a backup solution, due to vulnerability of even a single bit error, and lack of granularity, and other reasons. However ... There is an attraction to ?zfs send? as an augmentation to the

Hi... I have had a problem when I am going to detach one specific LVM partitions of Xen, so I have been trying xm destroy <domain>, lvchange -an <lvm_partition>, lvremove -f.... So I haven''t had sucess. I restarted the server with init 1 yet and nothing... I have seem two specific process started xenwatch and xenbus, but I am not sure if this processes have some action over

Hello guys Does anyone use lvm2 backends for domU storages ? I do and I wanted to use lvm''s snapshot feature to make backups of domUs in background but I got the following problem. When I create a snapshot LV and copy data from it to backup storage it works perfect. Then I do umount and then lvremove. lvremove asks me if I really want to remove the volume and then just hangs forever.

Hello, I would really appreciate some help/guidance with this problem. First of all sorry for the long message. I would file a bug, but do not know if it is my fault, dm-cache, qemu or (probably) a combination of both. And i can imagine some of you have this setup up and running without problems (or maybe you think it works, just like i did, but it does not): PROBLEM LVM cache writeback

Hi, I want to rename some volume groups and logical volumes. I was not surprised when it would not let me rename active volumes. So I booted up the system using the CentOS 5.5 LiveCD, but the LiveCD makes the logical volumes browsable using Nautilus, so they are still active and I can't rename them. Tried: /usr/sbin/lvchange -a n VolGroup00/LogVol00 but it still says: LV

I could launch `lvchange -asy` on the source host manually, but the aim of hooks is to automatically execute such commands and avoid human errors. Le 22 janvier 2020 09:18:54 GMT+01:00, Michal Privoznik <mprivozn@redhat.com> a écrit : >On 1/21/20 9:10 AM, Guy Godfroy wrote: >> Hello, this is my first time posting on this mailing list. >> >> I wanted to suggest a

Let''s suppose you rename a file or directory. /tank/widgets/a/rel2049_773.13-4/somefile.txt Becomes /tank/widgets/b/foogoo_release_1.9/README Let''s suppose you are now working on widget B, and you want to look at the past zfs snapshot of README, but you don''t remember where it came from. That is, you don''t know the previous name or location where that

On 06.07.2017 15:35, Robert Nichols wrote: > On 07/06/2017 04:43 AM, Volker wrote: >> Hi all, >> >> one of my lv has become completely unaccessible. Every read access >> results in a buffer io error: >> >> Buffer I/O error on dev dm-13, logical block 0, async page read >> >> this goes for every block in the lv. A ddrescue failed on every single

Dear all, I'm rather new to glusterfs but have some experience running lager lustre and beegfs installations. These filesystems provide active/active failover. Now, I discovered that I can also do this in glusterfs, although I didn't find detailed documentation about it. (I'm using glusterfs 3.10.8) So my question is: can I really use glusterfs to do failover in the way described

I converted a system disk from a virtualbox VM and added to the config on a qemu VM. All seems well until I try to mount it. The virtual machine shows data for the disk image using commands like: pvs lvs lvdisplay xena-1 but there is no /dev/xena-1/root to be mounted. I also cannot seem to figure out whether the lvm related modules are available for the virtual machine kernel. Has anyone

Hello All, on a Centos5 system installed with software raid I'm getting: raid1: raid set md127 active with 2 out of 2 mirrors md:.... autorun DONE md: Autodetecting RAID arrays md: autorun..... md : autorun DONE trying to resume form /dev/md1 creating root device mounting root device mounting root filesystem ext3-fs : unable to read superblock mount :

Hey, Can anyone tell me why option 1 works and option 2 fails ? I know I need swap and such, however in trouble shooting this issue I trimmed down my config. It fails on trying to format my logical volume, because the mount point does not exist (/dev/volgroup/logvol) It seems that with option 2, the partitions are created and LVM is setup correctly. However the volgroup / logvolume was not

Hi Stefan, I think what you propose will work, though you should test it thoroughly. I think more generally, "the GlusterFS way" would be to use 2-way replication instead of a distributed volume; then you can lose one of your servers without outage. And re-synchronize when it comes back up. Chances are if you weren't using the SAN volumes; you could have purchased two servers