Re: workload balance

[huang jun <hjwsm1989@gmail.com>]

thanks，Josh
By default，we set two replicas for each PG,so if we use ceph
as back-end storage of a website, you know, some files will be frequently read,
if then of thousands clients do this, some osd's workload will be very high.
so in this circumstance, how to balance the whole  cluster's workload?

在 2011年6月28日 上午5:06，Josh Durgin <josh.durgin@dreamhost.com> 写道：
> On 06/27/2011 02:34 AM, huang jun wrote:
>> hi，all
>> Here is a problem confused me a lot. Some OSD's workload will be very high
>> when the client read a file continuously. So i think the cluster must
>> have a strategy to balance workload
>> there are two classes "MovingAverager and  IATAverager ",but i can not
>> figure out what the class IATAverager mean here?
>> and futhermore, can we bring tiered storage theory in ceph?
>>
>> thanks!
>
> Those classes were attempts to use some statistics to discard some
> reads, but they did not work so they've been removed from master.
> Our current strategy is simply striping files across objects.
>
> Josh
>
--
To unsubscribe from this list: send the line "unsubscribe ceph-devel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html