Dne 22.4.2016 v 23:00 Nicholas D Steeves napsal(a): > On 21 April 2016 at 18:44, Chris Murphy <lists@xxxxxxxxxxxxxxxxx> wrote: >> On Thu, Apr 21, 2016 at 6:53 AM, Martin Svec <martin.svec@xxxxxxxx> wrote: >>> Hello, >>> >>> we use btrfs subvolumes for rsync-based backups. During backups btrfs often fails with "No space >>> left" error and goes to readonly mode (dmesg output is below) while there's still plenty of >>> unallocated space: >> Are you snapshotting near the time of enospc? If so it's a known >> problem that's been around for a while. There are some suggestions in >> the archives but I think the main thing is to back off on the workload >> momentarily, take the snapshot, and then resume the workload. I don't >> think it has to come to a complete stop but it's a lot more >> reproducible with heavy writes. > Is this known problem specific to heavy writes + take a snapshot + -o > compress (either zlib or lzo), or does this enospc also affect the > more simple heavy writes + take a snapshot case? Is there a greater > likelyhood of running into it if using compression? In our case, I saw no difference when the compression was disabled. Martin Svec -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
