Re: radosgw-admin bucket check kills SSD disks

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On Wed, Feb 22, 2017 at 4:06 PM, Marius Vaitiekunas <mariusvaitiekunas@xxxxxxxxx> wrote:
Hi Cephers,

We are running latest jewel (10.2.5). Bucket index sharding is set to 8. rgw pools except data are placed on SSD. 
Today I've done some testing and run bucket index check on a bucket with ~120k objects:

# radosgw-admin bucket check -b mybucket --fix --check-objects --rgw-realm=myrealm

In a minute or two three SSD disks were down and flapping. My guess is that these disks host a PG with index of this bucket. 

Should we expect that with --check-objects flag and do not use it?

--
Marius Vaitiekūnas

Hi,

In case, somebody also hits the issue :) Actually bucket index shard in our cluster is 1. We didn't know about the following setting: 'rgw_override_bucket_index_max_shards'. We though, that only 'bucket_index_max_shards' is enough. 
Keep in mind, that you need to update existing zonegroups to make sharding work after correct settings are set..

--
Marius Vaitiekūnas
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