Consideration of configuration-based input/output predictions in multi-tiered data storage system management

A computer program product comprising a computer readable storage medium having program instructions embodied therewith, wherein the computer readable storage medium is not a transitory signal per se, the program instructions readable and/or executable by a processor to cause the processor to perform a method comprising:

• detecting, by the processor, that a configuration change for a virtualization layer in a multi-tiered data storage system has been received;
• determining, by the processor, whether the configuration change corresponds to a tiering adjustment;
• in response to determining that the configuration change corresponds to a tiering adjustment, predicting, by the processor, input/output (I/O) pattern changes which will result from the configuration change;
• determining, by the processor for each specific extent corresponding to the predicted I/O pattern changes, whether the specific extent is stored in a tier of the multi-tiered data storage system that is suitable to satisfy the predicted I/O pattern changes which correspond to the respective specific extent;
• and
• in response to determining that at least one of the specific extents is stored in a tier of the multi-tiered data storage system which is not suitable to satisfy the predicted I/O pattern changes which correspond to the at least one specific extent, migrating, by the processor, the at least one specific extent to another one of the tiers in the multi-tiered data storage system determined as being suitable to satisfy the predicted I/O pattern changes.

A system, comprising:

• a processor;
• and
• logic integrated with the processor, executable by the processor, or integrated with and executable by the processor, the logic being configured to:
• detect, by the processor, that a configuration change for a virtualization layer in a multi-tiered data storage system has been received;
• determine, by the processor, whether the configuration change corresponds to a tiering adjustment;
• in response to determining that the configuration change corresponds to a tiering adjustment, predict, by the processor, input/output (I/O) pattern changes which will result from the configuration change;
• determine, by the processor for each specific extent corresponding to the predicted I/O pattern changes, whether the specific extent is stored in a tier of the multi-tiered data storage system that is suitable to satisfy the predicted I/O pattern changes which correspond to the respective specific extent;
• and
• in response to determining that at least one of the specific extents is stored in a tier of the multi-tiered data storage system which is not suitable to satisfy the predicted I/O pattern changes which correspond to the at least one specific extent, migrate, by the processor, the at least one specific extent to another one of the tiers in the multi-tiered data storage system determined as being suitable to satisfy the predicted I/O pattern changes.