-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 https://github.com/ceph/ceph/pull/7024 - ---------------- Robert LeBlanc PGP Fingerprint 79A2 9CA4 6CC4 45DD A904 C70E E654 3BB2 FA62 B9F1 On Mon, Jan 11, 2016 at 1:47 PM, Robert LeBlanc wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA256 > > Currently set as DNM. :( I guess the author has not updated the PR as > requested. If needed, I can probably submit a new PR as we would > really like to see this in the next Hammer release. I just need to > know if I need to get involved. I don't want to take credit for Nick's > work, so I've been waiting. > > Thanks > - ---------------- > Robert LeBlanc > PGP Fingerprint 79A2 9CA4 6CC4 45DD A904 C70E E654 3BB2 FA62 B9F1 > > > On Mon, Jan 11, 2016 at 4:29 AM, Nick Fisk wrote: >> Looks like it has been done >> >> https://github.com/zhouyuan/ceph/commit/f352b8b908e8788d053cbe15fa3632b226a6758d >> >> >>> -----Original Message----- >>> From: Robert LeBlanc [mailto:robert@xxxxxxxxxxxxx] >>> Sent: 08 January 2016 18:23 >>> To: Nick Fisk >>> Cc: Wade Holler ; hnuzhoulin >>> ; Ceph-User >>> Subject: Re: using cache-tier with writeback mode, raods bench >>> result degrade >>> >>> -----BEGIN PGP SIGNED MESSAGE----- >>> Hash: SHA256 >>> >>> Are you backporting that to hammer? We'd love it. >>> - ---------------- >>> Robert LeBlanc >>> PGP Fingerprint 79A2 9CA4 6CC4 45DD A904 C70E E654 3BB2 FA62 B9F1 >>> >>> >>> On Fri, Jan 8, 2016 at 9:28 AM, Nick Fisk wrote: >>> > There was/is a bug in Infernalis and older, where objects will always get >>> promoted on the 2nd read/write regardless of what you set the >>> min_recency_promote settings to. This can have a dramatic effect on >>> performance. I wonder if this is what you are experiencing? >>> > >>> > This has been fixed in Jewel https://github.com/ceph/ceph/pull/6702 . >>> > >>> > You can compile the changes above to see if it helps or I have a .deb for >>> Infernalis where this is fixed if it's easier. >>> > >>> > Nick >>> > >>> >> -----Original Message----- >>> >> From: ceph-users [mailto:ceph-users-bounces@xxxxxxxxxxxxxx] On Behalf >>> >> Of Wade Holler >>> >> Sent: 08 January 2016 16:14 >>> >> To: hnuzhoulin ; ceph-devel@xxxxxxxxxxxxxxx >>> >> Cc: ceph-users@xxxxxxxx >>> >> Subject: Re: using cache-tier with writeback mode, raods >>> >> bench result degrade >>> >> >>> >> My experience is performance degrades dramatically when dirty objects >>> >> are flushed. >>> >> >>> >> Best Regards, >>> >> Wade >>> >> >>> >> >>> >> On Fri, Jan 8, 2016 at 11:08 AM hnuzhoulin wrote: >>> >> Hi,guyes >>> >> Recentlly,I am testing cache-tier using writeback mode.but I found a >>> >> strange things. >>> >> the performance using rados bench degrade.Is it correct? >>> >> If so,how to explain.following some info about my test: >>> >> >>> >> storage node:4 machine,two INTEL SSDSC2BB120G4(one for systaem,the >>> >> other one used as OSD),four sata as OSD. >>> >> >>> >> before using cache-tier: >>> >> root@ceph1:~# rados bench -p coldstorage 300 write --no-cleanup >>> >> ---------------------------------------------------------------- >>> >> Total time run: 301.236355 >>> >> Total writes made: 6041 >>> >> Write size: 4194304 >>> >> Bandwidth (MB/sec): 80.216 >>> >> >>> >> Stddev Bandwidth: 10.5358 >>> >> Max bandwidth (MB/sec): 104 >>> >> Min bandwidth (MB/sec): 0 >>> >> Average Latency: 0.797838 >>> >> Stddev Latency: 0.619098 >>> >> Max latency: 4.89823 >>> >> Min latency: 0.158543 >>> >> >>> >> root@ceph1:/root/cluster# rados bench -p coldstorage 300 seq >>> >> Total time run: 133.563980 >>> >> Total reads made: 6041 >>> >> Read size: 4194304 >>> >> Bandwidth (MB/sec): 180.917 >>> >> >>> >> Average Latency: 0.353559 >>> >> Max latency: 1.83356 >>> >> Min latency: 0.027878 >>> >> >>> >> after configure cache-tier: >>> >> root@ubuntu:~/benchmarkcollect/Monitor# ceph osd tier add >>> coldstorage >>> >> hotstorage pool 'hotstorage' is now (or already was) a tier of >>> >> 'coldstorage' >>> >> >>> >> root@ubuntu:~/benchmarkcollect/Monitor# ceph osd tier cache-mode >>> >> hotstorage writeback set cache-mode for pool 'hotstorage' to >>> >> writeback >>> >> >>> >> root@ubuntu:~/benchmarkcollect/Monitor# ceph osd tier set-overlay >>> >> coldstorage hotstorage overlay for 'coldstorage' is now (or already >>> >> was) 'hotstorage' >>> >> >>> >> oot@ubuntu:~# ceph osd dump|grep storage pool 6 'coldstorage' >>> >> replicated size 3 min_size 1 crush_ruleset 0 object_hash rjenkins >>> >> pg_num 512 pgp_num 512 last_change 216 lfor 216 flags hashpspool >>> >> tiers 7 read_tier 7 write_tier 7 stripe_width 0 pool 7 'hotstorage' >>> >> replicated size 3 min_size 1 crush_ruleset 1 object_hash rjenkins >>> >> pg_num 128 pgp_num 128 last_change 228 flags >>> >> hashpspool,incomplete_clones tier_of 6 cache_mode writeback >>> >> target_bytes >>> >> 100000000000 hit_set bloom{false_positive_probability: 0.05, target_size: >>> >> 0, seed: 0} 3600s x6 stripe_width 0 >>> >> ------------------------------------------------------------- >>> >> rados bench -p coldstorage 300 write --no-cleanup Total time run: >>> >> 302.207573 Total writes made: 4315 Write size: 4194304 Bandwidth >>> >> (MB/sec): 57.113 >>> >> >>> >> Stddev Bandwidth: 23.9375 >>> >> Max bandwidth (MB/sec): 104 >>> >> Min bandwidth (MB/sec): 0 >>> >> Average Latency: 1.1204 >>> >> Stddev Latency: 0.717092 >>> >> Max latency: 6.97288 >>> >> Min latency: 0.158371 >>> >> >>> >> root@ubuntu:/# rados bench -p coldstorage 300 seq Total time run: >>> >> 153.869741 Total reads made: 4315 Read size: 4194304 Bandwidth >>> >> (MB/sec): 112.173 >>> >> >>> >> Average Latency: 0.570487 >>> >> Max latency: 1.75137 >>> >> Min latency: 0.039635 >>> >> >>> >> >>> >> ceph.conf: >>> >> -------------------------------------------- >>> >> [global] >>> >> fsid = 4ec1eb64-226c-4d90-8c5c-b6b6644be831 >>> >> mon_initial_members = ceph2, ceph3, ceph4 mon_host = >>> >> 10.**.**.241,10.**.**.242,10.**.**.243 >>> >> auth_cluster_required = cephx >>> >> auth_service_required = cephx >>> >> auth_client_required = cephx >>> >> filestore_xattr_use_omap = true >>> >> osd_pool_default_size = 3 >>> >> osd_pool_default_min_size = 1 >>> >> auth_supported = cephx >>> >> osd_journal_size = 10240 >>> >> osd_mkfs_type = xfs >>> >> osd crush update on start = false >>> >> >>> >> [client] >>> >> rbd_cache = true >>> >> rbd_cache_writethrough_until_flush = false rbd_cache_size = 33554432 >>> >> rbd_cache_max_dirty = 25165824 rbd_cache_target_dirty = 16777216 >>> >> rbd_cache_max_dirty_age = 1 rbd_cache_block_writes_upfront = false >>> >> [osd] filestore_omap_header_cache_size = 40000 >>> >> filestore_fd_cache_size = 40000 filestore_fiemap = true >>> >> client_readahead_min = 2097152 client_readahead_max_bytes = 0 >>> >> client_readahead_max_periods = 4 filestore_journal_writeahead = false >>> >> filestore_max_sync_interval = 10 filestore_queue_max_ops = 500 >>> >> filestore_queue_max_bytes = 1048576000 >>> >> filestore_queue_committing_max_ops = 5000 >>> >> filestore_queue_committing_max_bytes = 1048576000 >>> >> keyvaluestore_queue_max_ops = 500 keyvaluestore_queue_max_bytes >>> = >>> >> 1048576000 journal_queue_max_ops = 30000 journal_queue_max_bytes >>> = >>> >> 3355443200 osd_op_threads = 20 osd_disk_threads = 8 >>> >> filestore_op_threads = 4 osd_mount_options_xfs = >>> >> rw,noatime,nobarrier,inode64,logbsize=256k,delaylog >>> >> >>> >> [mon] >>> >> mon_osd_allow_primary_affinity=true >>> >> >>> >> -- >>> >> 使用Opera的电子邮件客户端：http://www.opera.com/mail/ >>> >> _______________________________________________ >>> >> ceph-users mailing list >>> >> ceph-users@xxxxxxxxxxxxxx >>> >> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com 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