ZFS deadlock in 14: with ZIL :-)

From: Graham Perrin <grahamperrin_at_gmail.com>
Date: Sat, 19 Aug 2023 11:55:46 UTC 
On 19/08/2023 11:31, Dimitry Andric wrote:

> On 19 Aug 2023, at 09:36, Graham Perrin <grahamperrin@gmail.com> wrote:
>> …
>>
>> <https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=271945#c0> no ZIL; I never used the feature.
> The ZIL always exists, but it can be stored on a separate device for
> performance reasons. See zpoolconcepts(7), the Intent Log section:
>
>       By default, the intent log is allocated from blocks within the main pool.
>       However, it might be possible to get better performance using separate
>       intent log devices such as NVRAM or a dedicated disk.  For example:
>             # zpool create pool sda sdb log sdc
>
> -Dimitry
Thanks!

I looked at the page umpteen times, that part never sunk in. Now I know.

<https://openzfs.github.io/openzfs-docs/man/master/7/zpoolconcepts.7.html#Intent_Log>