Data extra pool
The data_extra_pool is for data that cannot use erasure coding. For
example, multi-part uploads allow uploading a large object, such as a movie in multiple parts. These
parts must first be stored without erasure coding. Erasure coding applies to the whole object, not
the partial uploads.
Note: The placement group (PG) per Pool Calculator recommends a smaller number of PGs per pool for
the
data_extra_pool; however, the PG count is approximately twice the number of PGs
as the service pools and the same as the bucket index pool.To create a data extra pool, run the ceph osd pool create command with the pool
name, the number of PGs and PGPs, the replicated data durability method, and the
name of the rule. For example:
# ceph osd pool create .us-west.rgw.buckets.non-ec 64 64 replicated rgw-service