Re: btrfs snapshots
Am 20.03.23 um 07:38 schrieb Kees Meijs | Nefos:
Hi there,
On 19-03-2023 18:37, Stefan G. Weichinger wrote:
Do / did you run fileservers on btrfs?
Yes. There's a back up server (runnning something other then AMANDA)
with a 40-something TB volume with btrfs. Quite often (like every other
month) we notice btrfs driver issues. Mostly this is a kernel oops, then
a reboot (watchdog) and then minutes and minutes of remounting after the
machine was rebooted. Then a timeout since the mount took to long, and
then manual intervention.
What OS / distribution is that? What type of btrfs pool ("raid level")?
Insofar I can tell no loss yet in terms of data at rest, but obviously
all state and running back-ups are effected.
The oops'es seen mostly are in the context of cache or CoW related. Just
disabling free block cache and such, or other btrfs features, didn't
really help. It's noteworthy there are snapshots involved; 75 ~ 90 of them.
In general, we decided to move away from btrfs. Some systems are
migrated to ext4 (sometimes with LVM), some to ZFS.
Hm, I see. I am currently considering using btrfs for a new file server,
so that is interesting to me. That box will be smaller, maybe 8 TB or
so, running Debian 11.x (whatever is stable in a few months).
btrfs gets quite some development lately, but that is with latest
kernels: debian stable won't come with 6.2 or something.
thanks for that information
Re: btrfs snapshots
Am 17.03.23 um 09:20 schrieb Kees Meijs | Nefos: Hi Stefan, I'd recommend against btrfs and go for ZFS instead (also on Linux). Although I was a (really) great fan of btrfs; it just seemed to have too much bugs, sometimes even resulting in loss of data. My experience is different, my btrfs-pools didn't lose any data for years. Do / did you run fileservers on btrfs?
btrfs snapshots
Does anyone successfully use btrfs snapshots with amanda? Like in doing LVM snapshots pre-amdump etc ?
Re: Backup of Btrfs snapshots
On 18/01/17 05:43 AM, Jonas Hagen wrote: Hi We have an amanda server / client setup. Now one client has the root directory on a btrfs filesytem and we would like to back it up with the following procedure: 1) make a btrfs snapshot 2) mount this snapshot 3) make a backup of the snapshot using amanda Since the snapshot and mount command needs to be executed before amanda runs on this client, where can I place these commands? It should be an amanda script, something similar to amzfs-snapshot which do exacly that for ZFS. The script output the directory where the snapshot is mounted and amgtar backup that directory. See the amzfs-snapshot script and the man page. Jean-Louis Disclaimer The information contained in this communication from the sender is confidential. It is intended solely for use by the recipient and others authorized to receive it. If you are not the recipient, you are hereby notified that any disclosure, copying, distribution or taking action in relation of the contents of this information is strictly prohibited and may be unlawful. This email has been scanned for viruses and malware, and may have been automatically archived by Mimecast Ltd, an innovator in Software as a Service (SaaS) for business. Providing a safer and more useful place for your human generated data. Specializing in; Security, archiving and compliance. To find out more visit the Mimecast website.
Backup of Btrfs snapshots
Hi We have an amanda server / client setup. Now one client has the root directory on a btrfs filesytem and we would like to back it up with the following procedure: 1) make a btrfs snapshot 2) mount this snapshot 3) make a backup of the snapshot using amanda Since the snapshot and mount command needs to be executed before amanda runs on this client, where can I place these commands? Best regards Jonas
