[Sheepdog] speed test

Valerio Pachera sirio81 at gmail.com
Thu Sep 1 09:38:05 CEST 2011

Hi, I made simple write speed test.

I have 3 nodes:

node1 node2 have 1000Mbps network card.
node3 has a fast ethernet (100Mbps).

On my vm I run
dd if=/dev/zero of=deleteme bs=1M count=512

speed avarage is 7,1MB/s.

I removed node3 from the cluster, because I think it slows down everything.
I waited till the cluster finished to copy the missing chinks, then I
run the same test.

The speed was 9,1MB/s, so still like a fast ethernet.

I was also looking atop during the test on node1 and node2: the disk
was never busy more than 70%.

What do you think about it?
Shouldn't it be faster?

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