I've redeployed the original server, and re-tested this with Jammy. I
left the script running for a couple of days, and actually managed to
fill up the ZFS storage without running into the object number issues.
ubuntu@wringer-wooster:~$ zfs version
zfs-2.1.5-1ubuntu6~22.04.6
zfs-kmod-2.1.5-1ubuntu6~22.04.6
ubuntu@wringer-wooster:~$ apt policy zfs-dkms
zfs-dkms:
Installed: 2.1.5-1ubuntu6~22.04.6
Candidate: 2.1.5-1ubuntu6~22.04.6
Version table:
*** 2.1.5-1ubuntu6~22.04.6 500
500 http://archive.ubuntu.com/ubuntu jammy-proposed/universe amd64
Packages
100 /var/lib/dpkg/status
2.1.5-1ubuntu6~22.04.5 500
500 http://archive.ubuntu.com/ubuntu jammy-updates/universe amd64
Packages
2.1.5-1ubuntu6~22.04.4 500
500 http://archive.ubuntu.com/ubuntu jammy-security/universe amd64
Packages
2.1.2-1ubuntu3 500
500 http://archive.ubuntu.com/ubuntu jammy/universe amd64 Packages
ubuntu@wringer-wooster:~$ zpool iostat
capacity operations bandwidth
pool alloc free read write read write
---------- ----- ----- ----- ----- ----- -----
pooltest 6.86T 128G 0 0 8.70K 4.39K
ubuntu@wringer-wooster:~$ zfs list
NAME USED AVAIL REFER MOUNTPOINT
pooltest 6.86T 474K 24K /pooltest
pooltest/data 6.86T 474K 6.86T /pooltest/data
** Tags removed: verification-needed verification-needed-jammy
** Tags added: verification-done verification-done-jammy
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https://bugs.launchpad.net/bugs/2115683
Title:
ZFS hangs when writing to pools with high object count
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