NDB Cluster Configuration Files • MaxNoOfSavedMessages Version (or later) NDB 8.0.13 Type or units integer Default 25 Range 0 - 4294967039 (0xFFFFFEFF) Restart Type N (NDB 8.0.13) This parameter sets the maximum number of errors written in the error log as well as the maximum number of trace files that are kept before overwriting the existing ones. Trace files are generated when, for whatever reason, the node crashes. The default is 25, which sets these maximums to 25 error messages and 25 trace files. • MaxLCPStartDelay Version (or later) NDB 8.0.13 Type or units seconds Default 0 Range 0 - 600 Restart Type N (NDB 8.0.13) In parallel data node recovery, only table data is actually copied and synchronized in parallel; synchronization of metadata such as dictionary and checkpoint information is done in a serial fashion. In addition, recovery of dictionary and checkpoint information cannot be executed in parallel with performing of local checkpoints. This means that, when starting or restarting many data nodes concurrently, data nodes may be forced to wait while a local checkpoint is performed, which can result in longer node recovery times. It is possible to force a delay in the local checkpoint to permit more (and possibly all) data nodes to complete metadata synchronization; once each data node’s metadata synchronization is complete, all of the data nodes can recover table data in parallel, even while the local checkpoint is being executed. To force such a delay, set  MaxLCPStartDelay , which determines the number of seconds the cluster can wait to begin a local checkpoint while data nodes continue to synchronize metadata. This parameter should be set in the  [ndbd default]  section of the  config.ini  file, so that it is the same for all data nodes. The maximum value is 600; the default is 0. This parameter sets the number of REDO log files for the node, and thus the amount of space allocated to REDO logging. Because the REDO log files are organized in a ring, it is extremely important that the first and last log files in the set (sometimes referred to as the “head”  and “tail”  log files, respectively) • NoOfFragmentLogFiles Version (or later) NDB 8.0.13 Type or units integer Default 16 Range 3 - 4294967039 (0xFFFFFEFF) Restart Type IN (NDB 8.0.13) 4092