Retrieve ZFS related data

[crpb]

Get a bunch of zfs infos.
The -list's are kinda unreadable with the option '-o all' in a terminal but i guess it's better to have everything than selecting only bits and pieces.

Don't know about the filenames but that way it is at least clear what's inside. ¯_(ツ)_/¯

@akorn Maybe you have some notes on what should be thrown out or maybe added aswell.

[akorn]

I'm not sure how much sense running the zdb bit unconditionally makes; even on a small, flash-backed pool it will take several minutes to run. On a bigger one it may take hours or days.

In any case, it probably makes sense to run all these commands in parallel, like this:

  zfs_command_1 >out 2>err_out &
  zfs_command_2 >out 2>err_out &
...
  wait

Because they'll largely read the same stuff from the disk and I imagine this may help improve cache efficiency.

[mika]

Yeah I agree, the zdb command isn't an option for grml-hwinfo as-is.

I'm wondering whether we should also collect the ZFS information within a zfs sub directory? Opinions?

[akorn]

I'm wondering whether we should also collect the ZFS information within a zfs sub directory? Opinions?

I have no opinion (I don't think I've ever used grml-hwinfo).

[crpb]

Tried it on my local (True)NAS (FreeBSD) which isn't the fastest but w/o the zdb call it's fast enough as we don't look for snapshots which can take quite some time especially on slow backup targets.

root@nas ..l-hwinfo-2024-08-05--17-17-36-CEST/zfs (git)-[master] # ls -T -l
total 89
-rw-r--r--  1 root  wheel   16943 Aug  5 17:17:38 2024 arc_summary
-rw-r--r--  1 root  wheel       0 Aug  5 17:17:38 2024 arc_summary.error
-rw-r--r--  1 root  wheel   15491 Aug  5 17:17:38 2024 zfs-list.boot-pool
-rw-r--r--  1 root  wheel       0 Aug  5 17:17:38 2024 zfs-list.boot-pool.error
-rw-r--r--  1 root  wheel  227060 Aug  5 17:17:41 2024 zfs-list.p0
-rw-r--r--  1 root  wheel       0 Aug  5 17:17:38 2024 zfs-list.p0.error
-rw-r--r--  1 root  wheel    1901 Aug  5 17:17:38 2024 zpool-iostat.boot-pool
-rw-r--r--  1 root  wheel       0 Aug  5 17:17:38 2024 zpool-iostat.boot-pool.error
-rw-r--r--  1 root  wheel    1901 Aug  5 17:17:38 2024 zpool-iostat.p0
-rw-r--r--  1 root  wheel       0 Aug  5 17:17:38 2024 zpool-iostat.p0.error
-rw-r--r--  1 root  wheel    2304 Aug  5 17:17:38 2024 zpool-list.boot-pool
-rw-r--r--  1 root  wheel       0 Aug  5 17:17:38 2024 zpool-list.boot-pool.error
-rw-r--r--  1 root  wheel    3211 Aug  5 17:17:38 2024 zpool-list.p0
-rw-r--r--  1 root  wheel       0 Aug  5 17:17:38 2024 zpool-list.p0.error
-rw-r--r--  1 root  wheel     353 Aug  5 17:17:38 2024 zpool-status.boot-pool
-rw-r--r--  1 root  wheel       0 Aug  5 17:17:38 2024 zpool-status.boot-pool.error
-rw-r--r--  1 root  wheel     978 Aug  5 17:17:38 2024 zpool-status.p0
-rw-r--r--  1 root  wheel       0 Aug  5 17:17:38 2024 zpool-status.p0.error