[Gluster-devel] Infiniband slow throughput

[Anand Avati]

>
> [root at cluster0 ~]# sync ; time (dd if=/dev/zero of=/share/foo.bar bs=4k
> count=512K ; sync )
> 524288+0 records in
> 524288+0 records out
> 2147483648 bytes (2.1 GB) copied, 158.164 seconds, 13.6 MB/s
>
> real    2m39.045s
> user    0m0.108s
> sys     0m1.420s
>

write speeds without write-behind will be low for such small block sizes
because of the high context switch overhead incurred by fuse. A bigger block
size would help too. Please let us know the results with write-behind.

avati