Slow zfs destroy

[Eugene Grosbein]

28.11.2019 16:38, Pete French wrote:

> On 28/Nov/2019 07:03, Eugene Grosbein wrote:
>> 28.11.2019 13:46, Eugene Grosbein wrote:
>>
>>> Hi!
>>>
>>> Is it normal that "zfs destroy" for one ZVOL with attribute "used" equal to 2112939808 bytes (~2GB)
>>> takes over two minutes waiting on "tx_sync_done_cv"? The pool is RAID1 over five SSDs encrypted with GELI
>>
>> The pool is *RAIDZ1*
> 
> Not normal, no. Having said that I have seen zfs destory take a very lng time on occasion,
> but for a 2GB volume then thats surprisng. Is there actual disc activity during this time ?

Yes, a lot. Several rsync instances writing to another ZFS (mounted file systems) in parallel:
copying data over ssh from remote hosts (backups).