----- Original Message -----
> From: "Humble Devassy Chirammal" <[email protected]>
> To: "Atin Mukherjee" <[email protected]>
> Cc: "Ben Turner" <[email protected]>, "gluster-users"
> <[email protected]>
> Sent: Tuesday, October 13, 2015 6:14:46 AM
> Subject: Re: [Gluster-users] Speed up heal performance
>
> >Good news is we already have a WIP patch review.glusterd.org/10851 to
> introduce multi threaded shd. Credits to Richard/Shreyas from facebook for
> this. IIRC, we also have a BZ for the same
> >
> Isnt it the same bugzilla (
> https://bugzilla.redhat.com/show_bug.cgi?id=1221737) mentioned in the
> commit log?
@Lindsay - No need for a BZ, the above BZ should suffice.
@Anyone - In the commit I see:
{ .key = "cluster.shd-max-threads",
.voltype = "cluster/replicate",
.option = "shd-max-threads",
.op_version = 1,
.flags = OPT_FLAG_CLIENT_OPT
},
{ .key = "cluster.shd-thread-batch-size",
.voltype = "cluster/replicate",
.option = "shd-thread-batch-size",
.op_version = 1,
.flags = OPT_FLAG_CLIENT_OPT
},
So we can tune max threads and thread batch size? I understand max threads,
but what is batch size? In my testing on 10G NICs with a backend that will
service 10G throughput I see about 1.5 GB per minute of SH throughput. To
Lindsay's other point, will this patch improve SH throughput? My systems can
write at 1.5 GB / Sec and NICs can to 1.2 GB / sec but I only see ~1.5 GB per
_minute_ of SH throughput. If we can not only make SH multi threaded, but
improve the performance of a single thread that would be awesome. Super bonus
points if we can have some sort of tunible that can limit the bandwidth each
thread can consume. It would be great to be able to crank things up when the
systems aren't busy and slow things down when load increases.
-b
>
> --Humble
>
>
> On Tue, Oct 13, 2015 at 7:26 AM, Atin Mukherjee <[email protected]>
> wrote:
>
> > -Atin
> > Sent from one plus one
> > On Oct 13, 2015 3:16 AM, "Ben Turner" <[email protected]> wrote:
> > >
> > > ----- Original Message -----
> > > > From: "Lindsay Mathieson" <[email protected]>
> > > > To: "gluster-users" <[email protected]>
> > > > Sent: Friday, October 9, 2015 9:18:11 AM
> > > > Subject: [Gluster-users] Speed up heal performance
> > > >
> > > > Is there any way to max out heal performance? My cluster is unused
> > overnight,
> > > > and lightly used at lunchtimes, it would be handy to speed up a heal.
> > > >
> > > > The only tuneable I found was cluster.self-heal-window-size, which
> > doesn't
> > > > seem to make much difference.
> > >
> > > I don't know of any way to speed this up, maybe someone else could chime
> > in here that knows the heal daemon better than me. Maybe you could open an
> > RFE on this? In my testing I only see 2 files getting healed at a time per
> > replica pair. I would like to see this be multi threaded(if its not
> > already) with the ability to tune it to control resource usage(similar to
> > what we did in the rebalance refactoring done recently). If you let me
> > know the BZ # I'll add my data + suggestions, I have been testing this
> > pretty extensively in recent weeks and good data + some ideas on how to
> > speed things up.
> > Good news is we already have a WIP patch review.glusterd.org/10851 to
> > introduce multi threaded shd. Credits to Richard/Shreyas from facebook for
> > this. IIRC, we also have a BZ for the same but the patch is in rfc as of
> > now. AFAIK, this is a candidate to land in 3.8 as well, Vijay can correct
> > me otherwise.
> > >
> > > -b
> > >
> > > > thanks,
> > > > --
> > > > Lindsay
> > > >
> > > > _______________________________________________
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>
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