On Wed, Aug 24, 2016 at 2:13 AM, Sage Weil <sweil@xxxxxxxxxx> wrote: > This is huge. It takes the pg_info_t str from 306 bytes to 847 bytes, and > this _info omap key is rewritten on *every* IO. > > We could shrink this down significant with varint and/or delta encoding > since a huge portion of it is just a bunch of uint64_t counters. This > will probably cost some CPU time, but OTOH it'll also shrink our metadata > down a fair bit too which will pay off later. > > Anybody want to tackle this? what about separating "object_stat_collection_t stats" from pg_stat_t? pg info should be unchanged for most of times, we could only update object related stats. This may help to reduce half bytes. > sage > -- > 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 -- 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
