Re: mon disk access pattern

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]



On 06/15/2012 04:51 AM, Wido den Hollander wrote:
Hi,

On 15-06-12 07:52, Stefan Priebe - Profihost AG wrote:
Hello list,

i read somewhere that the mon has "special" disk access patterns - even
though it does not write much data.

"special"? Where did you read that? The monitor has about 1 ~ 2GB of
storage.

So if your monitor has something like 4GB ~ 8GB of RAM, your kernel
should cache almost all your monitor data.


I think at some point someone mentioned to me that the mon can cause a lot of syncs, so running them on the OSDs without syncfs might be detrimental. For the majority of our internal performance testing I've kept them off the OSDs just to be sure.

--
To unsubscribe from this list: send the line "unsubscribe ceph-devel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html


[CEPH Users]     [Information on CEPH]     [Linux USB Devel]     [Video for Linux]     [Linux Audio Users]     [Photo]     [Yosemite News]    [Yosemite Photos]    [Free Online Dating]     [Linux Kernel]     [Linux SCSI]     [XFree86]

Add to Google Powered by Linux