NDB Cluster Configuration Files • DiskSyncSize • MaxDiskWriteSpeed • MaxDiskWriteSpeedOtherNodeRestart Version (or later) NDB 8.0.13 Type or units bytes Default 4M Range 32K - 4294967039 (0xFFFFFEFF) Restart Type N (NDB 8.0.13) Version (or later) NDB 8.0.13 Type or units numeric Default 20M Range 1M - 1024G Restart Type S (NDB 8.0.13) Version (or later) NDB 8.0.13 Type or units numeric Default 50M Range 1M - 1024G Restart Type S (NDB 8.0.13) 4111 Set the maximum rate for writing to disk, in bytes per second, by local checkpoints and backup operations when one or more data nodes in this NDB Cluster are restarting, other than this node. For setting the maximum rate of disk writes allowed while this data node is restarting, use MaxDiskWriteSpeedOwnRestart . For setting the maximum rate of disk writes allowed when no data For setting the maximum rate of disk writes allowed while this data node is restarting, use MaxDiskWriteSpeedOwnRestart . For setting the maximum rate of disk writes allowed while other data nodes are restarting, use  MaxDiskWriteSpeedOtherNodeRestart . The minimum speed for disk writes by all LCPs and backup operations can be adjusted by setting  MinDiskWriteSpeed . Set the maximum rate for writing to disk, in bytes per second, by local checkpoints and backup operations when no restarts (by this data node or any other data node) are taking place in this NDB Cluster. The default value is 4M (4 megabytes). When  ODirect  is enabled, it is not necessary to set  DiskSyncSize ; in fact, in such cases its value is simply ignored. Note This is the maximum number of bytes to store before flushing data to a local checkpoint file. This is done to prevent write buffering, which can impede performance significantly. This parameter is  not  intended to take the place of  TimeBetweenLocalCheckpoints .