Hi Cephers, While looking at disk utilization on OSD, I noticed the disk was constantly busy with large number of small writes, further investigation showed that, as radosgw uses xattrs to store metadata (e.g. etag, content-type, etc.), which made the xattrs get from local to extents, which incurred extra I/O.
I would like to check if anybody has experience with offloading the metadata to omap: 1> Offload everything to omap? If this is the case, should we make the inode size as 512 (instead of 2k)? 2> Partial offload the metadata to omap, e.g. only offloading the rgw specified metadata to omap. Any sharing is deeply appreciated. Thanks! Thanks, Guang -- 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
