### 23.6.10 NDB Cluster Disk Data Tables

[23.6.10.1 NDB Cluster Disk Data Objects](mysql-cluster-disk-data-objects.html)
[23.6.10.2 NDB Cluster Disk Data Storage Requirements](mysql-cluster-disk-data-storage-requirements.html)

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 NDB Cluster supports storing nonindexed columns of [`NDB`](mysql-cluster.html) tables on disk, rather than in RAM. Column data and logging metadata are kept in data files and undo log files, conceptualized as tablespaces and log file groups, as described in the next section—see [Section 23.6.10.1, “NDB Cluster Disk Data Objects”](mysql-cluster-disk-data-objects.html).

 NDB Cluster Disk Data performance can be influenced by a number of configuration parameters. For information about these parameters and their effects, see [Disk Data Configuration Parameters](mysql-cluster-ndbd-definition.html#mysql-cluster-ndbd-definition-disk-data-parameters), and [Disk Data and GCP Stop errors](mysql-cluster-ndbd-definition.html#mysql-cluster-ndbd-definition-gcp-stop-errors).

 You should also set the [`DiskDataUsingSameDisk`](mysql-cluster-ndbd-definition.html#ndbparam-ndbd-diskdatausingsamedisk) data node configuration parameter to `false` when using separate disks for Disk Data files.

 See also [Disk Data file system parameters](mysql-cluster-ndbd-definition.html#mysql-cluster-ndbd-disk-data-filesystem-parameters).

 NDB 8.0 provides improved support when using Disk Data tables with solid-state drives, in particular those using NVMe. See the following documentation for more information:

* [Disk Data latency parameters](mysql-cluster-ndbd-definition.html#mysql-cluster-ndbd-definition-disk-data-latency-parameters)

* [Section 23.6.14.31, “The ndbinfo diskstat Table”](mysql-cluster-ndbinfo-diskstat.html)

* [Section 23.6.14.32, “The ndbinfo diskstats\_1sec Table”](mysql-cluster-ndbinfo-diskstats-1sec.html)

* [Section 23.6.14.49, “The ndbinfo pgman\_time\_track\_stats Table”](mysql-cluster-ndbinfo-pgman-time-track-stats.html)

