Dynamically modifying system parameters in data storage system

In a storage system including a cache memory and a plurality of storage devices accessible as logical volumes, a method of dynamically changing system behavior on a logical volume basis, comprising:

• reading stored system parameters defining system behavior for at least one logical volume;
• altering system behavior for said at least one logical volume to match said stored system parameters;
• receiving an indication of user-requested changes to system behavior for said at least one logical volume;
• dynamically altering system behavior for said at least one logical volume in accordance with said user-requested changes;
• and
• storing system parameters that define said altered system behavior for said at least one logical volume;
• wherein said system behavior includes copy performance;
• wherein modifying copy performance system behavior includes providing a forced interleaving of copies from all logical volumes;
• wherein a time value for said forced interleaving is calculated by:
• Interleave time=N*(average track copy execution time)+max (inter-track copy times of all LV's on physical volume);
• wherein N is a target number of storage device tracks to be copied per interval period.

In a data storage system including a cache memory and a plurality of storage devices accessible as logical volumes, a method of dynamically changing system behavior on a logical volume basis, comprising:

• reading stored system parameters defining system behavior for at least one logical volume;
• altering system behavior for said at least one logical volume to match said stored system parameters;
• receiving an indication of user-requested changes to system behavior for said at least one logical volume;
• dynamically altering system behavior for said at least one logical volume in accordance with said user-requested changes;
• and
• storing system parameters that define said altered system behavior for said at least one logical volume;
• wherein said system behavior is one of the set of copy priority, RDF copy priority, secondary storage backup copy priority, service copy priority, and disk scrub priority.

A data storage system including a cache memory and a plurality of storage devices accessible as logical volumes, said system comprising:

• system parameters defining system behavior for at least one logical volume, said system parameters stored in cache memory, and also replicated on one of said plurality of storage devices;
• an interface component, to receive from a user indications of changed system parameters defining new system behavior for said at least one logical volume;
• a user interface application component, coupled to said interface component, to allow said user to monitor said system behavior, and to allow said user to initiate real-time changes to said system behavior, said user interface application component operable to convert user initiated real-time changes into data to appropriately modify said system parameters stored in cache memory, said user interface application component allowing said user to change said system behavior by selecting a value along a range from a minimum to a maximum and mapping said selected value to an appropriate value to modify said system parameters to match said user selected value for said system behavior, whereupon said data storage system modifies said system behavior for said at least one logical volume;
• and
• said data storage system replicates said modified system parameters on one of said plurality of storage devices.

A data storage system including a cache memory and a plurality of storage devices accessible as logical volumes, said system comprising:

• system parameters defining system behavior for at least one logical volume, said system parameters stored in cache memory, and also replicated on one of said plurality of storage devices;
• an interface component, to receive from a user indications of changed system parameters defining new system behavior for said at least one logical volume;
• wherein said interface component, upon receiving said indications of changed system parameters, appropriately modifies said system parameters stored in cache memory, whereupon said data storage system modifies said system behavior for said at least one logical volume;
• and
• said data storage system replicates said modified system parameters on one of said plurality of storage devices;
• and
• a user interface application component, coupled to said interface component, to allow said user to monitor said system behavior, and to allow said user to initiate real-time changes to said system behavior, wherein said user interface application includes a graphic user interface (GUI) that converts user initiated real-time changes into data to appropriately modify said system parameters stored in cache memory;
• wherein said GUI allows said user to change said system behavior by selecting a value along a range from a minimum to a maximum, and said GUI maps said selected value into to an appropriate value to modify said system parameters to match said user selected value for said system behavior.

A data storage system including a cache memory and a plurality of storage devices accessible as logical volumes, said system comprising:

• system parameters defining system behavior for at least one logical volume, said system parameters stored in cache memory, and also replicated on one of said plurality of storage devices;
• an interface component, to receive from a user indications of changed system parameters defining new system behavior for said at least one logical volume;
• wherein said interface component, upon receiving said indications of changed system parameters, appropriately modifies said system parameters stored in cache memory, whereupon said data storage system modifies said system behavior for said at least one logical volume;
• and
• said data storage system replicates said modified system parameters on one of said plurality of storage devices;
• wherein said system behavior is one of the set of copy priority, RDF copy priority, secondary storage backup copy priority, service copy priority, and disk scrub priority.