The table below lists and explains names and meanings of the DataKeeper parameters. These values are tuned by editing the /etc/default/LifeKeeper configuration file.
|LKDR_CHUNK_SIZE||Sets the chunk size of bitmap in kilobits.||Integers||256||Creating a resource|
|LKDR_SPEED_LIMIT||Specifies the maximum bandwidth that a resync will ever take – this should be set high enough to allow resyncs to go at the maximum speed possible.||Integers||50000||Resyncing a resource|
|LKDR_SPEED_LIMIT_MIN||Specifies how fast the resync should be allowed to go when there is other I/O going on at the same time. As a rule of thumb, this should be set to half or less of the drive’s maximum write throughput in order to avoid starving out normal I/O activity when a resync occurs.||Integers||20000||Resyncing a resource|
|LKDR_ASYNC_LIMIT||Specifies the number of outstanding target writes that can be in flight at a given time. Increase this value for higher performance with asynchronous mirrors.||Integers||4096||Creating a resource|
|LKDR_NO_FULL_SYNC||Suppresses a full resync of newly added targets.||
0: not suppress
||As required||For detailed information, refer to “”.|
|LKDR_WAIT_FOR_PREVIOUS_SOURCE_TIMEOUT||Specifies how long to wait for the previous source to join the cluster so that its bitmap can be merged. A full resync is required if replication is resumed to a target before the previous source’s bitmap is merged. This setting applies to all netraid devices; individual devices can NOT be configured with a different value.||
0: do not wait
-1: wait indefinitely for the previous source to rejoin the cluster
> 0 number of seconds to wait
||As required||How SIOS DataKeeper Works|
|NBD_NR_REQUESTS||Specifies the number of outstanding I/O requests that can be in flight at a given time. Increase this value for higher mirroring performance.||Integers||2048||As required|
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