Appendix I. BlueStore configuration options
The following are Ceph BlueStore configuration options that can be configured during deployment.
Note
This list is not complete.
- rocksdb_cache_size
- Description
- The size of the RocksDB cache in MB.
- Type
- 32-bit Integer
- Default
-
512
- bluestore_throttle_bytes
- Description
- Maximum bytes available before the user throttles the input or output (I/O) submission.
- Type
- Size
- Default
- 64 MB
- bluestore_throttle_deferred_bytes
- Description
- Maximum bytes for deferred writes before the user throttles the I/O submission.
- Type
- Size
- Default
- 128 MB
- bluestore_throttle_cost_per_io
- Description
- Overhead added to the transaction cost in bytes for each I/O.
- Type
- Size
- Default
- 0 B
- bluestore_throttle_cost_per_io_hdd
- Description
-
The default
bluestore_throttle_cost_per_iovalue for HDDs. - Type
- Unsigned integer
- Default
-
67 000
- bluestore_throttle_cost_per_io_ssd
- Description
-
The default
bluestore_throttle_cost_per_iovalue for SSDs. - Type
- Unsigned integer
- Default
-
4 000
- bluestore_debug_enforce_settings
- Description
-
hddenforces settings intended for BlueStore above a rotational drive.ssdenforces settings intended for BlueStore above a solid drive - Type
-
default,hdd,ssd - Default
defaultNoteAfter changing the
bluestore_debug_enforce_settingsoption, restart the OSD.
