Hello Colin, I set a couple of ZFS options a day or two ago, and have bee playing videos to see if we still have the problem. The options I set were:
o zfs set xattr=sa storage o zfs set xattr=sa storage/vault o zfs set ralatime=on storage o zfs set ralatime=on storage/vault We've played about four hours of video, and we have not seen the hang. Do you still want to pursue this? I could set the options back and do the trace or leave the options and do the trace, or should we just consider this fixed? My only concern about the latter option is that the installation was a default install with Ubuntu 17.10 and it seems these options should be the default on any linux distro. Let me know what you want to do? Best regards, Colin. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to zfs-linux in Ubuntu. https://bugs.launchpad.net/bugs/1725859 Title: zfs frequently hangs (up to 30 secs) during sequential read Status in zfs-linux package in Ubuntu: Incomplete Bug description: Updated to artful (17.10) yesterday. Trying to read (play video) from mirrored ZFS disks from an external USB 3 enclosure. Zpool is defined as: root@hetty:/home/crlb# zpool status pool: storage state: ONLINE scan: resilvered 20K in 0h0m with 0 errors on Fri Oct 20 18:38:49 2017 config: NAME STATE READ WRITE CKSUM storage ONLINE 0 0 0 mirror-0 ONLINE 0 0 0 sdb ONLINE 0 0 0 sdc ONLINE 0 0 0 errors: No known data errors root@hetty:/home/crlb# Found that I could re-create the problem with: rsync -av --progress <zfs_file> <internal_ext4_path> Also found that: dd if=/dev/sdX of=/dev/null status=progress bs=1024 count=10000000 Where "X" is either "b" or "c" does not hang. Installed: root@hetty:/home/crlb# apt list --installed | grep -i zfs libzfs2linux/artful,now 0.6.5.11-1ubuntu3 amd64 [installed,automatic] zfs-zed/artful,now 0.6.5.11-1ubuntu3 amd64 [installed,automatic] zfsutils-linux/artful,now 0.6.5.11-1ubuntu3 amd64 [installed] root@hetty:/home/crlb# Help please. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/zfs-linux/+bug/1725859/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
