Hey Mahnoosh, > Running cluster in octopus 15.2.12 . We have a big bucket with about 800M > objects and resharding this bucket makes many slow ops in our bucket index > osds. I wanna know what happens if I don't reshard this bucket any more? > How does it affect the performance? The performance problem would be only > for that bucket or it affects the entire bucket index pool? Unfortunately, if you don't reshard the bucket, it's likely that you'll see widespread index pool performance and stability issues, generally manifesting as one or more OSDs becoming very busy to the point of holding up traffic for multiple buckets or even flapping (the OSD briefly gets marked down), leading to recovery. Recovering large index shards can itself cause issues like this to occur. Although the official recommendation, IIRC, is 100K objects per index shard, the exact objects per shard count at which one starts to experience these sorts of issues highly depends on the hardware involved and user workload. Josh _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
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