[ovs-discuss] OVN Database sizes - Auto compact feature

Daniel Alvarez Sanchez dalvarez at redhat.com
Wed Mar 7 18:18:41 UTC 2018


No worries, I just triggered the test now running OVS compiled out of
2.8 branch (2.8.3). I'll post the results and investigate too.

I have just sent a patch to fix the timing issue we can see in the traces I
posted. I applied it and it works, I believe it's good to fix as it gives us
an idea of how frequent the compact is, and also to backport if you
agree with it.

Thanks!

On Wed, Mar 7, 2018 at 7:13 PM, Ben Pfaff <blp at ovn.org> wrote:

> OK, thanks.
>
> If this is a lot of trouble, let me know and I'll investigate directly
> instead of on the basis of a suspected regression.
>
> On Wed, Mar 07, 2018 at 07:06:50PM +0100, Daniel Alvarez Sanchez wrote:
> > All right, I'll repeat it with code in branch-2.8.
> > Will post the results once the test finishes.
> > Daniel
> >
> > On Wed, Mar 7, 2018 at 7:03 PM, Ben Pfaff <blp at ovn.org> wrote:
> >
> > > On Wed, Mar 07, 2018 at 05:53:15PM +0100, Daniel Alvarez Sanchez wrote:
> > > > Repeated the test with 1000 ports this time. See attached image.
> > > > For some reason, the sizes grow while deleting the ports (the
> > > > deletion task starts at around x=2500). The weird thing is why
> > > > they keep growing and the online compact doesn't work as when
> > > > I do it through ovs-appctl tool.
> > > >
> > > > I suspect this is a bug and eventually it will grow and grow unless
> > > > we manually compact the db.
> > >
> > > Would you mind trying out an older ovsdb-server, for example the one
> > > from OVS 2.8?  Some of the logic in ovsdb-server around compaction
> > > changed in OVS 2.9, so it would be nice to know whether this was a
> > > regression or an existing bug.
> > >
>
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