[lustre-discuss] ZFS w/Lustre problem

Steve Thompson smt at vgersoft.com
Thu Nov 19 11:17:36 PST 2020

On Wed, 18 Nov 2020, Faaland, Olaf P. wrote:

> You mentioned you may have a fix for zfs_send.c in ZFS.  Although Lustre 
> tickles the bug, it's not likely that is the only way to tickle it.
> Is there already a bug report for your issue at 
> https://github.com/openzfs/zfs/issues?  If not, can you create one, even 
> if your patch isn't successful?  That's the place to get your patch 
> landed, and/or get help with the issue.

The issue is already reported as #8067. The patch mentioned in this 
article is still valid, but for a different file; the txg_wait_synced()
call is at line 2215 of dmu_send.c on ZFS 0.7.13. This patch does not fix 
that very slow performance of 'zfs recv', but it does fix the 'dataset 
does not exist' problem.

Steve Thompson                 E-mail:      smt AT vgersoft DOT com
Voyager Software LLC           Web:         http://www DOT vgersoft DOT com
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