[ovirt-users] Re: ovirt-imagio-proxy upload speed slow
On Fri, Sep 13, 2019 at 3:54 PM Mikael Öhman <micketeer(a)gmail.com> wrote:
Perhaps it will help future sysadmins will learn from my mistake.
I also saw very poor upload speeds (~30MB/s) no matter what I tried. I
went through the whole route with unix-sockets and whatnot.
But, in the end, it just turned out that the glusterfs itself was the
bottleneck; abysmal performance for small block sizes.
What do you mean by "small block sizes"?
I found the list of suggested performance tweaks that RHEL suggests. In
particular, it was the "network.remote-dio=on" setting that
made all the
difference. Almost 10x faster.
Note that network.remote-dio is not the recommended configuration
for ovirt, in particular if on hyperconverge setup when it can be harmful
by delaying sanlock I/O.
https://github.com/oVirt/ovirt-site/blob/4a9b28aac48870343c5ea4d1e83a63c1...
(Patch in discussion)
Nir
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