On Fri, Jul 20, 2012 at 1:15 PM, Tommi Virtanen <[email protected] (mailto:[email protected])> wrote: > On Fri, Jul 20, 2012 at 8:31 AM, Sławomir Skowron <[email protected] > (mailto:[email protected])> wrote: > > I know that this feature is disabled, are you planning to enable this > > in near future ?? > > > > > PG splitting/joining is the next major project for the OSD. It won't > be backported to argonaut, but it will be in the next stable release, > and will probably appear in our regular development release in 2-3 > months. > > > I have many of drives, and my S3 instalation use only few of them in > > one time, and i need to improve that. > > > > When i use it as rbd it use all of them. > > Radosgw normally stores most of the data for a single S3-level object > in a single RADOS object, where as RBD stripes disk images across > objects by default in 4MB chunks. If you have only a few S3 objects, > you will see an uneven distribution. It will get more balanced as you > upload more images. Also, if you use multi-part uploads, each part > goes into a separate RADOS object, so that'll spread the load more > evenly. >
RGW only does this for small objects — I believe its default chunk size is also 4MB. But I'm pretty sure this is his problem: > Now, if your problem comes from the rgw pools having too few PGs to > begin with, the distribution will be.. lumpy.. even with more objects. > Here's another mailing list thread that talks about what you can do > about that: http://article.gmane.org/gmane.comp.file-systems.ceph.devel/8069 > -Greg -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
