-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 Not that I know of. - ---------------- Robert LeBlanc PGP Fingerprint 79A2 9CA4 6CC4 45DD A904 C70E E654 3BB2 FA62 B9F1
On Mon, Jan 18, 2016 at 10:33 AM, deeepdish wrote: > Thanks Robert. Will definitely try this. Is there a way to implement > “gradual CRUSH” changes? I noticed whenever cluster wide changes are pushed > (crush map, for instance) the cluster immediately attempts to align itself > disrupting client access / performance… > > >> On Jan 18, 2016, at 12:22 , Robert LeBlanc wrote: >> >> -----BEGIN PGP SIGNED MESSAGE----- >> Hash: SHA256 >> >> I'm not sure why you have six monitors. Six monitors buys you nothing >> over five monitors other than more power being used, and more latency >> and more headache. See >> http://docs.ceph.com/docs/hammer/rados/configuration/mon-config-ref/#monitor-quorum >> for some more info. Also, I'd consider 5 monitors overkill for this >> size cluster, I'd recommend three. >> >> Although this is most likely not the root cause of your problem, you >> probably have an error here: "root replicated-T1" is pointing to >> b02s08 and b02s12 and "site erbus" is also pointing to b02s08 and >> b02s12. You probably meant to have "root replicated-T1" pointing to >> erbus instead. >> >> Where I think your problem is, is in your "rule replicated" section. >> You can try: >> step take replicated-T1 >> step choose firstn 2 type host >> step chooseleaf firstn 2 type osdgroup >> step emit >> >> What this does is choose two hosts from the root replicated-T1 (which >> happens to be both hosts you have), then chooses an OSD from two >> osdgroups on each host. >> >> I believe the problem with your current rule set is that firstn 0 type >> host tries to select four hosts, but only two are available. You >> should be able to see that with 'ceph pg dump', where only two osds >> will be listed in the up set. >> >> I hope that helps. >> -----BEGIN PGP SIGNATURE----- >> Version: Mailvelope v1.3.3 >> Comment: https://www.mailvelope.com >> >> wsFcBAEBCAAQBQJWnR9kCRDmVDuy+mK58QAA5hUP/iJprG4nGR2sJvL//8l+ >> V6oLYXTCs8lHeKL3ZPagThE9oh2xDMV37WR3I/xMNTA8735grl8/AAhy8ypW >> MDOikbpzfWnlaL0SWs5rIQ5umATwv73Fg/Mf+K2Olt8IGP6D0NMIxfeOjU6E >> 0Sc3F37nDQFuDEkBYjcVcqZC89PByh7yaId+eOgr7Ot+BZL/3fbpWIZ9kyD5 >> KoPYdPjtFruoIpc8DJydzbWdmha65DkB65QOZlI3F3lMc6LGXUopm4OP4sQd >> txVKFtTcLh97WgUshQMSWIiJiQT7+3D6EqQyPzlnei3O3gACpkpsmUteDPpn >> p8CDeJtIpgKnQZjBwfK/bUQXdIGem8Y0x/PC+1ekIhkHCIJeW2sD3mFJduDQ >> 9loQ9+IsWHfQmEHLMLdeNzRXbgBY2djxP2X70fXTg31fx+dYvbWeulYJHiKi >> 1fJS4GdbPjoRUp5k4lthk3hDTFD/f5ZuowLDIaexgISb0bIJcObEn9RWlHut >> IRVi0fUuRVIX3snGMOKjLmSUe87Od2KSEbULYPTLYDMo/FsWXWHNlP3gVKKd >> lQJdxcwXOW7/v5oayY4wiEE6NF4rCupcqt0nPxxmbehmeRPxgkWCKJJs3FNr >> VmUdnrdpfxzR5c8dmOELJnpNS6MTT56B8A4kKmqbbHCEKpZ83piG7uwqc+6f >> RKkQ >> =gp/0 >> -----END PGP SIGNATURE----- >> ---------------- >> Robert LeBlanc >> PGP Fingerprint 79A2 9CA4 6CC4 45DD A904 C70E E654 3BB2 FA62 B9F1 >> >> >> On Sun, Jan 17, 2016 at 6:31 PM, deeepdish wrote: >>> Hi Everyone, >>> >>> Looking for a double check of my logic and crush map.. >>> >>> Overview: >>> >>> - osdgroup bucket type defines failure domain within a host of 5 OSDs + 1 >>> SSD. Therefore 5 OSDs (all utilizing the same journal) constitute an >>> osdgroup bucket. Each host has 4 osdgroups. >>> - 6 monitors >>> - Two node cluster >>> - Each node: >>> - 20 OSDs >>> - 4 SSDs >>> - 4 osdgroups >>> >>> Desired Crush Rule outcome: >>> - Assuming a pool with min_size=2 and size=4, all each node would contain a >>> redundant copy of each object. Should any of the hosts fail, access to >>> data would be uninterrupted. >>> >>> Current Crush Rule outcome: >>> - There are 4 copies of each object, however I don’t believe each node has a >>> redundant copy of each object, when a node fails, data is NOT accessible >>> until ceph rebuilds itself / node becomes accessible again. >>> >>> I susepct my crush is not right, and to remedy it may take some time and >>> cause cluster to be unresponsive / unavailable. Is there a way / method >>> to apply substantial crush changes gradually to a cluster? >>> >>> Thanks for your help. >>> >>> >>> Current crush map: >>> >>> # begin crush map >>> tunable choose_local_tries 0 >>> tunable choose_local_fallback_tries 0 >>> tunable choose_total_tries 50 >>> tunable chooseleaf_descend_once 1 >>> tunable straw_calc_version 1 >>> >>> # devices >>> device 0 osd.0 >>> device 1 osd.1 >>> device 2 osd.2 >>> device 3 osd.3 >>> device 4 osd.4 >>> device 5 osd.5 >>> device 6 osd.6 >>> device 7 osd.7 >>> device 8 osd.8 >>> device 9 osd.9 >>> device 10 osd.10 >>> device 11 osd.11 >>> device 12 osd.12 >>> device 13 osd.13 >>> device 14 osd.14 >>> device 15 osd.15 >>> device 16 osd.16 >>> device 17 osd.17 >>> device 18 osd.18 >>> device 19 osd.19 >>> device 20 osd.20 >>> device 21 osd.21 >>> device 22 osd.22 >>> device 23 osd.23 >>> device 24 osd.24 >>> device 25 osd.25 >>> device 26 osd.26 >>> device 27 osd.27 >>> device 28 osd.28 >>> device 29 osd.29 >>> device 30 osd.30 >>> device 31 osd.31 >>> device 32 osd.32 >>> device 33 osd.33 >>> device 34 osd.34 >>> device 35 osd.35 >>> device 36 osd.36 >>> device 37 osd.37 >>> device 38 osd.38 >>> device 39 osd.39 >>> >>> # types >>> type 0 osd >>> type 1 osdgroup >>> type 2 host >>> type 3 rack >>> type 4 site >>> type 5 root >>> >>> # buckets >>> osdgroup b02s08-osdgroupA { >>> id -81 # do not change unnecessarily >>> # weight 18.100 >>> alg straw >>> hash 0 # rjenkins1 >>> item osd.0 weight 3.620 >>> item osd.1 weight 3.620 >>> item osd.2 weight 3.620 >>> item osd.3 weight 3.620 >>> item osd.4 weight 3.620 >>> } >>> osdgroup b02s08-osdgroupB { >>> id -82 # do not change unnecessarily >>> # weight 18.100 >>> alg straw >>> hash 0 # rjenkins1 >>> item osd.5 weight 3.620 >>> item osd.6 weight 3.620 >>> item osd.7 weight 3.620 >>> item osd.8 weight 3.620 >>> item osd.9 weight 3.620 >>> } >>> osdgroup b02s08-osdgroupC { >>> id -83 # do not change unnecessarily >>> # weight 19.920 >>> alg straw >>> hash 0 # rjenkins1 >>> item osd.10 weight 3.620 >>> item osd.11 weight 3.620 >>> item osd.12 weight 3.620 >>> item osd.13 weight 3.620 >>> item osd.14 weight 5.440 >>> } >>> osdgroup b02s08-osdgroupD { >>> id -84 # do not change unnecessarily >>> # weight 19.920 >>> alg straw >>> hash 0 # rjenkins1 >>> item osd.15 weight 3.620 >>> item osd.16 weight 3.620 >>> item osd.17 weight 3.620 >>> item osd.18 weight 3.620 >>> item osd.19 weight 5.440 >>> } >>> host b02s08 { >>> id -80 # do not change unnecessarily >>> # weight 76.040 >>> alg straw >>> hash 0 # rjenkins1 >>> item b02s08-osdgroupA weight 18.100 >>> item b02s08-osdgroupB weight 18.100 >>> item b02s08-osdgroupC weight 19.920 >>> item b02s08-osdgroupD weight 19.920 >>> } >>> osdgroup b02s12-osdgroupA { >>> id -121 # do not change unnecessarily >>> # weight 18.100 >>> alg straw >>> hash 0 # rjenkins1 >>> item osd.20 weight 3.620 >>> item osd.21 weight 3.620 >>> item osd.22 weight 3.620 >>> item osd.23 weight 3.620 >>> item osd.24 weight 3.620 >>> } >>> osdgroup b02s12-osdgroupB { >>> id -122 # do not change unnecessarily >>> # weight 18.100 >>> alg straw >>> hash 0 # rjenkins1 >>> item osd.25 weight 3.620 >>> item osd.26 weight 3.620 >>> item osd.27 weight 3.620 >>> item osd.28 weight 3.620 >>> item osd.29 weight 3.620 >>> } >>> osdgroup b02s12-osdgroupC { >>> id -123 # do not change unnecessarily >>> # weight 19.920 >>> alg straw >>> hash 0 # rjenkins1 >>> item osd.30 weight 3.620 >>> item osd.31 weight 3.620 >>> item osd.32 weight 3.620 >>> item osd.33 weight 3.620 >>> item osd.34 weight 5.440 >>> } >>> osdgroup b02s12-osdgroupD { >>> id -124 # do not change unnecessarily >>> # weight 19.920 >>> alg straw >>> hash 0 # rjenkins1 >>> item osd.35 weight 3.620 >>> item osd.36 weight 3.620 >>> item osd.37 weight 3.620 >>> item osd.38 weight 3.620 >>> item osd.39 weight 5.440 >>> } >>> host b02s12 { >>> id -120 # do not change unnecessarily >>> # weight 76.040 >>> alg straw >>> hash 0 # rjenkins1 >>> item b02s12-osdgroupA weight 18.100 >>> item b02s12-osdgroupB weight 18.100 >>> item b02s12-osdgroupC weight 19.920 >>> item b02s12-osdgroupD weight 19.920 >>> } >>> root replicated-T1 { >>> id -1 # do not change unnecessarily >>> # weight 152.080 >>> alg straw >>> hash 0 # rjenkins1 >>> item b02s08 weight 76.040 >>> item b02s12 weight 76.040 >>> } >>> rack b02 { >>> id -20 # do not change unnecessarily >>> # weight 152.080 >>> alg straw >>> hash 0 # rjenkins1 >>> item b02s08 weight 76.040 >>> item b02s12 weight 76.040 >>> } >>> site erbus { >>> id -10 # do not change unnecessarily >>> # weight 152.080 >>> alg straw >>> hash 0 # rjenkins1 >>> item b02 weight 152.080 >>> } >>> >>> # rules >>> rule replicated { >>> ruleset 0 >>> type replicated >>> min_size 1 >>> max_size 10 >>> step take replicated-T1 >>> step choose firstn 0 type host >>> step chooseleaf firstn 0 type osdgroup >>> step emit >>> } >>> >>> # end crush map >>> >>> >>> >>> >>> _______________________________________________ >>> ceph-users mailing list >>> ceph-users@lists.ceph.com >>> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >>> > -----BEGIN PGP SIGNATURE----- Version: Mailvelope v1.3.3 Comment: https://www.mailvelope.com wsFcBAEBCAAQBQJWnSKNCRDmVDuy+mK58QAATgIQAIHVBvSoQ2pQ6/J/+KI6 5TfjqAhJ3Q7E9JwC0suZ9JRORhBcrbab5wnY4oMabLeAEazTST5gAedeMBV4 vFA1aG5RBpUcir1+49BZYpHuUuJuvviTSrVjojbr6eISvsJfFwq7BosQZw7h DxExk8Pm5l8cDXd2z03f34F7xDfX3u0UsLm/TCTfzxFAmwngkC6rsElJSXp+ MQ9mjBIncx+HkDWyshJjKBqhhXVfOa+euUuCcmTlIiGgIaA5PXNG+q+OJMnq 0ONb9TF51ApW3NvIgRMKo94g+rw7wSEJbe7LkzJOgkJ19rrLrit3uhCOLDha iF2ELgd9jNRbsODUd0iTU9DgecoWuCZMsCdpeYyoN+BO1OLAdNjgQH9JaHnx JeIT538/x8gSi8S7We0FjdPvY0dbIMneROocK8/e+byboindodfV0z2YJ4C3 kEkweIW+45PHjQWLPU6SVYtdZyHoUPOrCpEOTo/9uOILx8nmvcY2SEhyuiFd 6QfZKKCwPmhNDNB+UUPzrd8cp794RDp9bYue3Ql5L1K4Yln0nXEvzVoNp8eB JXjsFXkPMBB8njiS7E4e7CGc64azVlagGZ+H99jbCLVdyaTrT+9+/WGwl1Ut OzDhwuU/dPYodT2ULPYtrMN03LoKozd2MKh0wjebwONJOUgMxUvGLcffSmMb /TJ6 =tLy3 -----END PGP SIGNATURE----- _______________________________________________ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
