[Openstack] [Swift] Partition count

Shrinand Javadekar shrinand at maginatics.com
Mon Aug 10 21:01:54 UTC 2015

Good point. There should be at least 1 partition per disk and if I
have fewer partitions I'm limited to how many disks I can use and
won't be able to increase my cluster.

I'm currently hard-pressed for performance and the capacity (upper
limit rather) is known. In my case, I'm inclined to take the
performance benefit even if that means I can't grow my cluster.

Thanks for the reply Remo.

On Mon, Aug 10, 2015 at 1:29 PM, Remo Mattei <Remo at italy1.com> wrote:
> Cannot expand your cluster since this will limit you on what your partitions are. You may want to read up and maybe you can try more than 100 partitions and see if that is still an issue. Without looking at your ring options etc. It is hard to make a call.
> Inviato da iPhone
>> Il giorno 10/ago/2015, alle ore 12:49, Shrinand Javadekar <shrinand at maginatics.com> ha scritto:
>> Hi,
>> I have a Swift setup with 8 disks of 3TB each. I went by the suggested
>> config of having over 100 partitions per disk. However, with this I'm
>> see that performance to be really slow.
>> I reduced the number of partitions to about 8 per disk and the
>> performance has gone up by almost 5x.
>> I realize that lesser partitions would mean larger replication time
>> if/when it is needed. Are there any other side effects of reducing the
>> # of partitions?
>> Thanks in advance.
>> -Shri
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