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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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| changelog | ||
| dev | ||
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| install | ||
| man | ||
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| architecture.rst | ||
| CMakeLists.txt | ||
| conf.py | ||
| favicon.ico | ||
| glossary.rst | ||
| index.rst | ||
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| release-notes.rst | ||
| releases.rst | ||
