Hi,
I have an 2 nodes with 20 bricks in total (10+10).
First test:
2 Nodes with Distributed – Striped – Replicated (2 x 2)
10GbE Speed between nodes
“dd” performance: 400mb/s and higher
Downloading a large file from internet and directly to the gluster: 250-300mb/s
Now same test without Stripe but with sharding. This results are same when I set shard size 4MB or 32MB. (Again 2x Replica here)
Dd performance: 70mb/s
Download directly to the gluster performance : 60mb/s
Now, If we do this test twice at the same time (two dd or two doewnload at the same time) it goes below 25/mb each or slower.
I thought sharding is at least equal or a little slower (maybe?) but these results are terribly slow.
I tried tuning (cache, window-size etc..). Nothing helps.
GlusterFS 3.11 and Debian 9 used. Kernel also tuned. Disks are “xfs” and 4TB each.
Is there any tweak/tuning out there to make it fast?
Or is this an expected behavior? If its, It is unacceptable. So slow. I cannot use this on production as it is terribly slow.
The reason behind I use shard instead of stripe is i would like to eleminate files that bigger than brick size.
Thanks,
Gencer.
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