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With bluestore, making the smallest write match min_alloc_size avoids write amplification. With EC pools this is the stripe unit, or stripe_width / num_data_chunks. Rather than requiring people to divide by k to get the smallest ec write, allow it to be specified directly via stripe_unit. Store it in the ec profile so changing a monitor config option isn't necessary to set it. This is particularly important for ec overwrites since they allow random i/o which should match bluestore's checksum granularity (aka min_alloc_size). Signed-off-by: Josh Durgin <jdurgin@redhat.com> |
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| .. | ||
| auth-config-ref.rst | ||
| ceph-conf.rst | ||
| demo-ceph.conf | ||
| filestore-config-ref.rst | ||
| filesystem-recommendations.rst | ||
| general-config-ref.rst | ||
| index.rst | ||
| journal-ref.rst | ||
| mon-config-ref.rst | ||
| mon-lookup-dns.rst | ||
| mon-osd-interaction.rst | ||
| ms-ref.rst | ||
| network-config-ref.rst | ||
| osd-config-ref.rst | ||
| pool-pg-config-ref.rst | ||
| pool-pg.conf | ||