Specifying Device Size

Specify the device size using the --devicesize option. The recommended device size is:

(4x / nd + 4l/d) / 0.99 

Where

• x is the total size of user data

• n is the number of nodes (given by the --hosts option)

• d is the number of devices per node (given by the --datadevices option)

• l is the log buffer size (given by the attribute LogBufferSize)

  If re-fragmentation might occur (for example, using hadbm addnodes), then the recommended device size is:

  (8x / nd + 4l/d) / 0.99