On Tue, Aug 14, 2018 at 4:08 AM Glen Baars <g...@onsitecomputers.com.au> wrote:
> Hello Jason, > > > > I can confirm that your tests work on our cluster with a newly created > image. > > > > We still can’t get the current images to use a different object pool. Do > you think that maybe another feature is incompatible with this feature? > Below is a log of the issue. > I wouldn't think so. I used master branch for my testing but I'll try 12.2.7 just in case it's an issue that's only in the luminous release. > :~# rbd info RBD_HDD/2ef34a96-27e0-4ae7-9888-fd33c38f657a > > rbd image '2ef34a96-27e0-4ae7-9888-fd33c38f657a': > > size 51200 MB in 12800 objects > > order 22 (4096 kB objects) > > block_name_prefix: rbd_data.37c8974b0dc51 > > format: 2 > > features: layering, exclusive-lock, object-map, fast-diff, > deep-flatten > > flags: > > create_timestamp: Sat May 5 11:39:07 2018 > > > > :~# rbd journal info --pool RBD_HDD --image > 2ef34a96-27e0-4ae7-9888-fd33c38f657a > > rbd: journaling is not enabled for image > 2ef34a96-27e0-4ae7-9888-fd33c38f657a > > > > :~# rbd feature enable RBD_HDD/2ef34a96-27e0-4ae7-9888-fd33c38f657a > journaling --journal-pool RBD_SSD > > > > :~# rbd journal info --pool RBD_HDD --image > 2ef34a96-27e0-4ae7-9888-fd33c38f657a > > rbd journal '37c8974b0dc51': > > header_oid: journal.37c8974b0dc51 > > object_oid_prefix: journal_data.1.37c8974b0dc51. > > order: 24 (16384 kB objects) > > splay_width: 4 > > ***************<NOTE NO object_pool> **************** > > > > :~# rbd info RBD_HDD/2ef34a96-27e0-4ae7-9888-fd33c38f657a > > rbd image '2ef34a96-27e0-4ae7-9888-fd33c38f657a': > > size 51200 MB in 12800 objects > > order 22 (4096 kB objects) > > block_name_prefix: rbd_data.37c8974b0dc51 > > format: 2 > > features: layering, exclusive-lock, object-map, fast-diff, > deep-flatten, journaling > > flags: > > create_timestamp: Sat May 5 11:39:07 2018 > > journal: 37c8974b0dc51 > > mirroring state: disabled > > > > Kind regards, > > *Glen Baars* > > *From:* Jason Dillaman <jdill...@redhat.com> > *Sent:* Tuesday, 14 August 2018 12:04 AM > *To:* Glen Baars <g...@onsitecomputers.com.au> > *Cc:* dillaman <dilla...@redhat.com>; ceph-users < > ceph-users@lists.ceph.com> > *Subject:* Re: [ceph-users] RBD journal feature > > > > On Sun, Aug 12, 2018 at 12:13 AM Glen Baars <g...@onsitecomputers.com.au> > wrote: > > Hello Jason, > > > > Interesting, I used ‘rados ls’ to view the SSDPOOL and can’t see any > objects. Is this the correct way to view the journal objects? > > > > You won't see any journal objects in the SSDPOOL until you issue a write: > > > > $ rbd create --size 1G --image-feature exclusive-lock rbd_hdd/test > > $ rbd bench --io-type=write --io-pattern=rand --io-size=4K --io-total=16M > rbd_hdd/test --rbd-cache=false > > bench type write io_size 4096 io_threads 16 bytes 16777216 pattern random > > SEC OPS OPS/SEC BYTES/SEC > > 1 320 332.01 1359896.98 > > 2 736 360.83 1477975.96 > > 3 1040 351.17 1438393.57 > > 4 1392 350.94 1437437.51 > > 5 1744 350.24 1434576.94 > > 6 2080 349.82 1432866.06 > > 7 2416 341.73 1399731.23 > > 8 2784 348.37 1426930.69 > > 9 3152 347.40 1422966.67 > > 10 3520 356.04 1458356.70 > > 11 3920 361.34 1480050.97 > > elapsed: 11 ops: 4096 ops/sec: 353.61 bytes/sec: 1448392.06 > > $ rbd feature enable rbd_hdd/test journaling --journal-pool rbd_ssd > > $ rbd journal info --pool rbd_hdd --image test > > rbd journal '10746b8b4567': > > header_oid: journal.10746b8b4567 > > object_oid_prefix: journal_data.2.10746b8b4567. > > order: 24 (16 MiB objects) > > splay_width: 4 > > object_pool: rbd_ssd > > $ rbd bench --io-type=write --io-pattern=rand --io-size=4K --io-total=16M > rbd_hdd/test --rbd-cache=false > > bench type write io_size 4096 io_threads 16 bytes 16777216 pattern random > > SEC OPS OPS/SEC BYTES/SEC > > 1 240 248.54 1018005.17 > > 2 512 263.47 1079154.06 > > 3 768 258.74 1059792.10 > > 4 1040 258.50 1058812.60 > > 5 1312 258.06 1057001.34 > > 6 1536 258.21 1057633.14 > > 7 1792 253.81 1039604.73 > > 8 2032 253.66 1038971.01 > > 9 2256 241.41 988800.93 > > 10 2480 237.87 974335.65 > > 11 2752 239.41 980624.20 > > 12 2992 239.61 981440.94 > > 13 3200 233.13 954887.84 > > 14 3440 237.36 972237.80 > > 15 3680 239.47 980853.37 > > 16 3920 238.75 977920.70 > > elapsed: 16 ops: 4096 ops/sec: 245.04 bytes/sec: 1003692.81 > > $ rados -p rbd_ssd ls | grep journal_data.2.10746b8b4567. > > journal_data.2.10746b8b4567.3 > > journal_data.2.10746b8b4567.0 > > journal_data.2.10746b8b4567.2 > > journal_data.2.10746b8b4567.1 > > > > rbd feature enable SLOWPOOL/RBDImage journaling --journal-pool SSDPOOL > > The symptoms that we are experiencing is a huge decrease in write speed ( > 1QD 128K writes from 160MB/s down to 14MB/s ). We see no improvement when > moving the journal to SSDPOOL ( but we don’t think it is really moving ) > > > > If you are trying to optimize for 128KiB writes, you might need to tweak > the "rbd_journal_max_payload_bytes" setting since it currently is defaulted > to split journal write events into a maximum of 16KiB payload [1] in order > to optimize the worst-case memory usage of the rbd-mirror daemon for > environments w/ hundreds or thousands of replicated images. > > > > Kind regards, > > *Glen Baars* > > > > *From:* Jason Dillaman <jdill...@redhat.com> > *Sent:* Saturday, 11 August 2018 11:28 PM > *To:* Glen Baars <g...@onsitecomputers.com.au> > *Cc:* ceph-users <ceph-users@lists.ceph.com> > *Subject:* Re: [ceph-users] RBD journal feature > > > > On Fri, Aug 10, 2018 at 3:01 AM Glen Baars <g...@onsitecomputers.com.au> > wrote: > > Hello Ceph Users, > > > > I am trying to implement image journals for our RBD images ( required for > mirroring ) > > > > rbd feature enable SLOWPOOL/RBDImage journaling --journal-pool SSDPOOL > > > > When we run the above command we still find the journal on the SLOWPOOL > and not on the SSDPOOL. We are running 12.2.7 and all bluestore. We have > also tried the ceph.conf option (rbd journal pool = SSDPOOL ) > > Has anyone else gotten this working? > > The journal header was on SLOWPOOL or the journal data objects? I would > expect that the journal metadata header is located on SLOWPOOL but all data > objects should be created on SSDPOOL as needed. > > > > Kind regards, > > *Glen Baars* > > This e-mail is intended solely for the benefit of the addressee(s) and any > other named recipient. It is confidential and may contain legally > privileged or confidential information. If you are not the recipient, any > use, distribution, disclosure or copying of this e-mail is prohibited. The > confidentiality and legal privilege attached to this communication is not > waived or lost by reason of the mistaken transmission or delivery to you. > If you have received this e-mail in error, please notify us immediately. > > _______________________________________________ > ceph-users mailing list > ceph-users@lists.ceph.com > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > > > > > -- > > Jason > > This e-mail is intended solely for the benefit of the addressee(s) and any > other named recipient. It is confidential and may contain legally > privileged or confidential information. If you are not the recipient, any > use, distribution, disclosure or copying of this e-mail is prohibited. The > confidentiality and legal privilege attached to this communication is not > waived or lost by reason of the mistaken transmission or delivery to you. > If you have received this e-mail in error, please notify us immediately. > > > [1] https://github.com/ceph/ceph/blob/master/src/common/options.cc#L6600 > > > > -- > > Jason > This e-mail is intended solely for the benefit of the addressee(s) and any > other named recipient. It is confidential and may contain legally > privileged or confidential information. If you are not the recipient, any > use, distribution, disclosure or copying of this e-mail is prohibited. The > confidentiality and legal privilege attached to this communication is not > waived or lost by reason of the mistaken transmission or delivery to you. > If you have received this e-mail in error, please notify us immediately. > -- Jason
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