BlueStore configuration options
Ceph BlueStore configuration options can be configured during deployment.
Table 1 describes the available BlueStore configuration options.
| Option | Description | Type | Default |
|---|---|---|---|
rocksdb_cache_size |
The size of the RocksDB cache in MB. | 32-bit integer | 512 |
bluestore_throttle_bytes |
Maximum bytes available before the user throttles input or output (I/O) submission. | Size | 64 MB |
bluestore_throttle_deferred_bytes |
Maximum bytes for deferred writes before the user throttles I/O submission. | Size | 128 MB |
bluestore_throttle_cost_per_io |
Overhead added to the transaction cost in bytes for each I/O. | Size | 0 B |
bluestore_throttle_cost_per_io_hdd |
Default bluestore_throttle_cost_per_io value for HDDs. |
Unsigned integer | 67 000 |
bluestore_throttle_cost_per_io_ssd |
Default bluestore_throttle_cost_per_io value for SSDs. |
Unsigned integer | 4 000 |
bluestore_debug_enforce_settings |
hdd enforces settings intended for BlueStore on rotational drives. ssd enforces settings intended for BlueStore on solid-state drives. |
default, hdd, ssd |
default
Note: After changing this option, restart the OSD.
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