NDB Cluster Configuration Files a global checkpoint, which can be thought of as a set of committed transactions that has been flushed to disk. In other words, as part of the commit process, a transaction is placed in a global checkpoint group. Later, this group’s log records are flushed to disk, and then the entire group of transactions is safely committed to disk on all computers in the cluster. In NDB 8.0.19 and later, it recommended when using solid-state disks (especially those employing NVMe) with Disk Data tables that you reduce this value. In such cases, you should also ensure that MaxDiskDataLatency  is set to a proper level. This parameter defines the interval between global checkpoints. The default is 2000 milliseconds. • TimeBetweenGlobalCheckpointsTimeout Version (or later) NDB 8.0.13 Type or units milliseconds Default 120000 Range 10 - 4294967039 (0xFFFFFEFF) Restart Type N (NDB 8.0.13) Version (or later) NDB 8.0.13 Type or units milliseconds Default 100 Range 0 - 32000 Restart Type N (NDB 8.0.13) This parameter defines the minimum timeout between global checkpoints. The default is 120000 milliseconds. • TimeBetweenEpochs This parameter defines the interval between synchronization epochs for NDB Cluster Replication. The default value is 100 milliseconds. TimeBetweenEpochs  is part of the implementation of “micro-GCPs” , which can be used to improve the performance of NDB Cluster Replication. • TimeBetweenEpochsTimeout Version (or later) NDB 8.0.13 Type or units milliseconds Default 0 Range 0 - 256000 4108