Re: Adding new OSDs, need to increase PGs?

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> On 3 dec. 2013, at 10:49, "Indra Pramana" <indra@xxxxxxxx> wrote:
> 
> Hi Brian and Robert,
> 
> Thanks for your replies! Appreciate.
> 
> Can I safely say that there will be no downtime to the cluster when I increase the pg_num and pgp_num values?

There is no actual downtime.
What I did see is that IOs will crawl to a halt during pg creation ( 1000 took a few minutes).
Also expect reduced performance during the rebalance of the data. 
The OSDs will be quite busy during that time.

I would certainly pick a time with low traffic to do this.


Cheers,
Robert van Leeuwen



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