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 1: suppress |
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As required | For detailed information, refer to “Avoiding Full Resynchronizations”. |
| 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 |
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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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