pre-sharding s3 buckets

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Hi,

We have a particular use case that we know that we're going to be writing lots of objects (up to 3 million) into a bucket. To take advantage of sharding, I'm wanting to shard buckets, without the performance hit of resharding.

So far I've created an empty bucket and then used the radosgw-admin:

radosgw-admin bucket reshard --bucket test --num-shards 10

Is there another way to do this?

Or, is there a s3/ceph configuration option that will set the number of shards when a bucket is created - with the hit that we might have buckets with multiple empty shards, a sacrifice that I'm willing to take for the convenience of it preconfigured.

Cheers,
Tom

--
Thomas Bennett

SRAO
Storage Engineer - Science Data Processing
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