Hi,
I seem to be getting significantly slower performance out of Riak CS
than I expect to see, and I wondered if I could get some advice about
where I might be going wrong.
I have a cluster of six nodes, with fairly good sequential-write disk
performance, for eg:
# dd if=/dev/zero of=test bs=1M count=500 conv=fsync
524288000 bytes (524 MB) copied, 1.27205 s, 412 MB/s
The riak partition is formatted as ext4, with data=writeback and
barriers disabled.
So given n_val=3, and six nodes with ~400MB/s transfer rates, you'd
expect to see some pretty fast transfers, right?
However the actual performance I'm getting is reliably a mere 9MB/s for
a single client writing to the cluster. (On a 500M transfer)
Is this kind of performance normal for this hardware?
If not, could you give me some pointers about what to check?
Thanks,
Toby
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