Adding Storage Space to Existing Nodes

You may want to add storage space to the HADB in the following circumstances:

You can increase the device size in MB using either of the following hadbm set commands:

hadbm set DataDeviceSize=size hadbm set TotalDatadeviceSizePerNode=size

For example:

hadbm set DataDeviceSize=1024

The TotalDatadeviceSizePerNode is equal to the DataDeviceSize multiplied by the NumberOfDatadevices. Therefore, TotalDatadeviceSizePerNode and DataDeviceSize are mutually dependent: changing one changes the other.

The DataDeviceSize should be as large as possible. The recommended size is four times the expected size of the user data, based on the number of users and the size of each user record.

Changing the DataDeviceSize or TotalDatadeviceSizePerNode on a database in a FaultTolerant or higher state means that the system is upgraded without loss of data, and the database remains in an Operational state during the reconfiguration. If you change device size on a system that is not FaultTolerant or better, data is lost. For more information about database states, see "Database Status".


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