[Gluster-users] performance due to network?

Eliezer Croitoru eliezer at ngtech.co.il
Fri Jun 13 16:17:04 UTC 2014

Just wondering if you had the chance of testing the network speed with 
iperf from host to host yet?
This is like the first thing to do while doing a full debug upside-down.
No matter what disks you have but note that each and one of them has a 
maximum IOps limit which sometimes you can hit in a way.
as already suggested by others in the past you can use a binary search 
dividing the issue one part at a time network.. disk.. controller.. 
driver.. software(since the software is proven to work).


On 06/12/2014 11:40 PM, Aronesty, Erik wrote:
> I suspect I'm having performance issues because of network speeds.
> /Supposedly/ I have 10gbit connections on all my NAS devices, however,
> it seems to me that the fastest I can write is 1Gbit.   When I'm copying
> very large files, etc, I see 'D' as the cp waits to I/O, but when I go
> the gluster servers, I don't see glusterfsd waiting (D) to write to the
> bricks themselves.  I have 4 nodes, each with  10Gbit connection, each
> has 2 Areca RAID controllers with 12 disk raid5, and the 2 controllers
> stripped into 1 large volume.   Pretty sure there's plenty of i/o left
> on the bricks themselves.
> Is it possible that "one big file" isn't the right test… should I try 20
> big files, and see how saturated my network can get?
> Erik Aronesty
> Senior Bioinformatics Architect
> *EA | Quintiles
> **/Genomic Services/**//*
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