Performing Online Relayout on a Volume

ISP does not support online relayout of an application volume in the same way as when the vxassist relayout command is used on a traditional volume. ISP can perform relayout internally if this is necessary to preserve the intent of a volume, or to support operations such as changing the number of mirrors, columns or logs that are associated with a volume. However, you should note that such operations may destroy the intent of a volume by changing its desired data redundancy or performance capabilities.

The nearest equivalent in ISP to the online relayout operation is capability transformation. This changes the capabilities of a volume in a controlled fashion, and preserves the size of the volume but not its intent. This operation is discussed in the following section. Subsequent sections describe how to add or remove mirrors, columns or logs to or from a volume, how to stop and reverse transformation and relayout operations, and how to verify that the intent of a volume has been preserved.