Tuesday, 2019-02-26

zaitcevTim's on the roll. While I was tinkering with DLO, he's basically crushed object server completely.00:08
DHEpy3 porting?00:12
zaitcevYEs.00:12
mattoliveraumorning.00:23
mattoliveraunice. I guess it's back to py3 reviews then :)00:23
openstackgerritJohn Dickinson proposed openstack/swift master: added changelog entries from stable releases  https://review.openstack.org/63923300:44
notmynametimburke: mattoliverau: if you wanna sanity check ^^. should just be an exact match of the stable releases that just were tagged00:46
notmyname(no I didn't go back and check all the older stable releases. I just did the ones we just tagged)00:47
notmynameinteresting. in the past month, swift has used 0.7% of the total resources used (node time) in gate jobs00:56
notmynamehttp://paste.openstack.org/show/746083/00:56
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* DHE FINALLY has a meeting this week about getting a production swift cluster.. :/01:47
notmynameyay!01:48
DHEikr01:48
tdasilvanotmyname: re: resources used in the gate jobs, that's really good. i've been concerned about the multi-node jobs, but i guess that ṕretty ok02:02
notmynameyeah, seems like not much to worry about there :-)02:08
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mattoliverauDHE:  nice!04:39
openstackgerritMerged openstack/swift master: added changelog entries from stable releases  https://review.openstack.org/63923306:01
kota_DHE: congratulations!!!06:22
openstackgerritKota Tsuyuzaki proposed openstack/swift feature/losf: Fix requirments to be correct.  https://review.openstack.org/63926006:35
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openstackgerritPete Zaitcev proposed openstack/swift master: py3: port dlo  https://review.openstack.org/63926307:49
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mcapeHi guys! I need help with understanding of situation. I was asked to fix a poorly run cluster, and removal of one of six object nodes was needed. I mostly did only adding maxconn values in haproxy to limit the load going to cluster, which allowed it to breathe normally.  After that, a decision to shrink it was made ( to create space for new cluster with proper defaults, and container sharding, which they need as they have 20mi09:39
mcapet by new admin, which removed one node from the ring, did rebalance but - oh yeah - forgot to sync rings to the all cluster nodes.09:40
mcapeNow they started to get errors.09:40
mcapeMy understanding is that this situation is foreseen (as ring sync can't happen atomically) and if I distribute new ring (with one node less) to all nodes of cluster, the replicators will eventually fix the thing.  Can you confirm that?09:40
mcapei just trying to understand what happened, the cluster was run for maybe 12 hours this way, one proxy sent files according to 5-node-ring, other two - according to 6-node-ring09:41
mcapefrom proxy with 5 nodes, the view is staying the same. but what will happen with files that were written by proxies with 6-node-ring?09:43
alecuyermcape: hello, that's right, if all machines now have the correct copy of the ring, the replicator (or reconstructor if running EC) will eventually store data on the 5 nodes. The data that was stored according to the old ring topology will be moved09:47
kota_mcape: are you meaning proxy has 5-node-ring but object-servers still keeps 6-node-ring?09:48
kota_alecuyer: o/09:48
mcapeonly one proxy had 6-node-ring for 12 hours09:49
alecuyerhello kota_09:49
mcapenope, sorry09:49
mcapeonly one proxy had 5-node-ring, all other nodes had 6-node-ring09:49
kota_oic, got it.09:50
mcapei do not grasp the concept of handoff nodes, so now some of the files landed on the handoffs from the 5-node-ring perspective?09:51
kota_generally speaking, swift will distribute replicas to different disks/nodes/zones/regions so it will be not much big issue except rebalance overhead.09:51
kota_the correct 5-nodes will attempts to locate replicas to correct location according to the ring.09:52
mcapebut how it will find object that landed via 6-node-rings?09:53
mcapegiven it has different ring now09:53
kota_and an object-server which has 5-nodes but no-assignment to itself do nothing anymore.09:53
kota_strictly speaking, object-replicator.09:53
kota_i think you removed a node from the ring, swift compute the new ring to avoid device change as possible.09:54
mcapeso, until the moment cluster finishes replication, some objects will be unaccessible?09:54
kota_so generally, 1 replica of 3 replica can be changed at once.09:54
mcapea-ha, got it09:54
mcapeso we have 2 replicas which is intact09:55
kota_mcape: true but proxy will find another one remaining in the available node.09:55
mcapegot it, thank you very much09:55
kota_:-)09:56
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openstackgerritTim Burke proposed openstack/pyeclib master: Update tox default env list; add py37 job  https://review.openstack.org/63944921:41
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mattoliveraumorning23:00
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