To just increase compaction and flusher threads, I think we can also configure rocksdb with below settings as well? bluestore_rocksdb_options = "...compaction_threads=, flusher_threads=, max_background_compactions=, max_background_flushes=..." Regards, Jianjian > -----Original Message----- > From: ceph-devel-owner@xxxxxxxxxxxxxxx [mailto:ceph-devel-owner@xxxxxxxxxxxxxxx] On Behalf Of Allen Samuels > Sent: Wednesday, June 08, 2016 4:53 PM > To: Manavalan Krishnan; Mark Nelson; Ceph Development > Subject: RE: RocksDB tuning > > Let's make a patch that creates actual Ceph parameters for these things so that we don't have to edit the source code in the future. > > > Allen Samuels > SanDisk |a Western Digital brand > 2880 Junction Avenue, San Jose, CA 95134 > T: +1 408 801 7030| M: +1 408 780 6416 > allen.samuels@xxxxxxxxxxx > > > -----Original Message----- > From: ceph-devel-owner@xxxxxxxxxxxxxxx [mailto:ceph-devel- > owner@xxxxxxxxxxxxxxx] On Behalf Of Manavalan Krishnan > Sent: Wednesday, June 08, 2016 3:10 PM > To: Mark Nelson <mnelson@xxxxxxxxxx>; Ceph Development <ceph- > devel@xxxxxxxxxxxxxxx> > Subject: RocksDB tuning > > Hi Mark > > Here are the tunings that we used to avoid the IOPs choppiness caused > by rocksdb compaction. > > We need to add the following options in src/kv/RocksDBStore.cc before > rocksdb::DB::Open in RocksDBStore::do_open opt.IncreaseParallelism(16); > opt.OptimizeLevelStyleCompaction(512 * 1024 * 1024); > > > > Thanks > Mana > > > > > > PLEASE NOTE: The information contained in this electronic mail message > is intended only for the use of the designated recipient(s) named > above. If the reader of this message is not the intended recipient, > you are hereby notified that you have received this message in error > and that any review, dissemination, distribution, or copying of this > message is strictly prohibited. If you have received this > communication in error, please notify the sender by telephone or > e-mail (as shown above) immediately and destroy any and all copies of > this message in your possession (whether hard copies or electronically stored copies). > -- > 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 -- 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
