KeyValueStore Config Reference¶
KeyValueStore is an alternative OSD backend compared to FileStore. Currently, it uses LevelDB as backend. KeyValueStore doesn’t need journal device. Each operation will flush into the backend directly.
keyvaluestore backend
| Description: | The backend used by KeyValueStore. |
|---|---|
| Type: | String |
| Required: | No |
| Default: | leveldb |
Queue¶
The following settings provide limits on the size of the KeyValueStore queue.
keyvaluestore queue max ops
| Description: | Defines the maximum number of operations in progress the KeyValueStore accepts before blocking on queuing new operations. |
|---|---|
| Type: | Integer |
| Required: | No. Minimal impact on performance. |
| Default: | 50 |
keyvaluestore queue max bytes
| Description: | The maximum number of bytes for an operation. |
|---|---|
| Type: | Integer |
| Required: | No |
| Default: | 100 << 20 |
Thread¶
keyvaluestore op threads
| Description: | The number of KeyValueStore operation threads that execute in parallel. |
|---|---|
| Type: | Integer |
| Required: | No |
| Default: | 2 |
keyvaluestore op thread timeout
| Description: | The timeout for a KeyValueStore operation thread (in seconds). |
|---|---|
| Type: | Integer |
| Required: | No |
| Default: | 60 |
keyvaluestore op thread suicide timeout
| Description: | The timeout for a commit operation before canceling the commit (in seconds). |
|---|---|
| Type: | Integer |
| Required: | No |
| Default: | 180 |
Misc¶
keyvaluestore default strip size
| Description: | Each object will be split into multiple key/value pairs and stored in the backend. Note: The size of the workload has a significant impact on performance. |
|---|---|
| Type: | Integer |
| Required: | No |
| Default: | 4096 |
keyvaluestore header cache size
| Description: | The size of the header cache (identical to inode in the local filesystem). A larger cache size enhances performance. |
|---|---|
| Type: | Integer |
| Required: | No |
| Default: | 4096 |
