Determining weight values for storage devices in a storage tier to use to select one of the storage devices to use as a target storage to which data from a source storage is migrated

Patent metadata

Field	Value
Publication number	US-2016291886-A1
Application number	US-201615176126-A
Country	US
Kind code	A1
Filing date	Jun 7, 2016
Priority date	Jan 2, 2013
Publication date	Oct 6, 2016
Grant date	—

Abstract

The present invention relates to a method, system, and computer program product for determining storage device weight values to use to select one of the storage devices to use as a target storage to which data from a source storage is migrated. A determination is made, for each of the storage devices, of static parameter values for static parameters comprising attributes of the storage device and dynamic parameter values for dynamic parameters providing device health information determined by accessing the storage device to determine operational conditions at the storage device. Storage device weight values are determined as a function of the static parameter values and the dynamic parameter values of the device. The determined storage device weight values are used to select one of the storage devices as the target storage to which data from the source storage is migrated.

First claim

1 - 26 . (canceled)

27 . A computer program product for migrating data from a source storage to a target storage comprising at least one of a plurality of storage devices, the computer program product comprising a non-transitory computer readable storage medium having computer readable program code embodied therein that executes to perform operations, the operations comprising:
querying each of the storage devices, to determine dynamic parameters values based on operational states of the storage devices related to at least one of condition of hardware components of the storage devices, measured performance, and sensed environmental measurements; determining, for each of the storage devices, a storage device weight value as a function of the determined dynamic parameter values of the storage device indicating a health of the storage device; receiving a request to migrate data from a source storage comprising one of the storage devices in a source storage tier to a target storage tier in a multi-tier storage system; determining the storage device weight values of the storage devices in the target storage tier; and using the determined storage device weight values of the storage devices in the target storage tier to select one of the storage devices in the target storage tier as a target storage to which data from the source storage is migrated.

28 . The computer program product of claim 27 , wherein there is a different vendor value assigned to different vendors, wherein the operations further comprise:
determining, for each of the storage devices, a vendor value for a vendor of the storage device, wherein the function uses the determined dynamic parameter values and the vendor value for the storage device to determine the storage device weight value, wherein higher preferred vendors have a higher vendor value than lessor preferred vendors.

29 . The computer program product of claim 27 , wherein the operations further comprise:
determining static parameter values indicating vendor supplied information on manufactured characteristics of the storage devices, wherein the function uses at least two of the static parameter values and the dynamic parameter values to determine the storage device weight values.

30 . The computer program product of claim 29 , wherein the vendor supplied information on the manufactured characteristics of the storage devices includes at least one of a mean time between failure, read/write performance, availability, and durability, and wherein dynamic parameters comprising at least one of a errors encountered, temperature, and data throughput, and wherein the dynamic parameters values based on operational states of the storage devices related to at least one of condition of hardware components of the storage devices, measured performance, and sensed environmental measurements includes a t least one of position of hardware components, remapped sector4s, internally detected errors, error correction codes, error counts indicating a number of errors encountered, detected operational times, temperature of the storage device, data throughput, humidity, and number of times written.

31 . The computer program product of claim 29 , wherein the function uses one parameter weight value for each of the dynamic and static parameters and applies the parameter weight values for the static parameters to the static parameter values to determine an aggregate static parameter value and applies the parameter weight values for dynamic parameters to the dynamic parameter values to determine an aggregate dynamic parameter value, wherein the storage device weight value is a function of the aggregate static parameter value and the aggregate dynamic parameter value.

32 . The computer program product of claim 31 , wherein the function provides a dynamic weight and a static weight, wherein the function applies the dynamic weight to the aggregate dynamic parameter value to produce a weighted aggregate dynamic parameter value and the static weight to the aggregate static parameter value to produce a weighted aggregate static parameter value, wherein the storage device weight value is a function of the weighted aggregate dynamic parameter value and the weighted aggregate static parameter value.

33 . The computer program product of claim 27 , wherein the storage devices are identified in at least a first tier and a second tier based on characteristics of the storage devices, wherein the first and second tiers have different parameters, wherein the dynamic parameter values for storage devices within one of the first and second tiers are capable of comprising different values, and wherein the source storage is in the first tier and wherein the target storage is selected from one of the storage devices identified as in the second tier.

34 . The computer program product of claim 33 , wherein the first tier comprises solid state storage devices and wherein the second tier comprises hard disk drives.

35 . The computer program product of claim 27 , the using the storage device weight values to select one of the storage devices as the target device comprises:
determining that multiple of the storage devices are deemed to have equivalent weight values; and using an administrative policy to select one of the determined multiple storage devices deemed to have equivalent weight values as the target device.

36 . A system for migrating data from a first storage to a target storage comprising at least one of a plurality of storage devices, comprising:
a processor; and computer readable storage medium having code executed by the processor to perform operations, the operations comprising
querying each of the storage devices, to determine dynamic parameters values based on operational states of the storage devices related to at least one of condition of hardware components of the storage devices, measured performance, and sensed environmental measurements;
determining, for each of the storage devices, a storage device weight value as a function of the determined dynamic parameter values of the storage device indicating a health of the storage device; receiving a request to migrate data from a source storage comprising one of the storage devices in a source storage tier to a target storage tier in a multi-tier storage system; determining the storage device weight values of the storage devices in the target storage tier; and using the determined storage device weight values of the storage devices in the target storage tier to select one of the storage devices in the target storage tier as a target storage to which data from the source storage is migrated.

37 . The system of claim 36 , wherein there is a different vendor value assigned to different vendors, wherein the operations further comprise:
determining, for each of the storage devices, a vendor value for a vendor of the storage device, wherein the function uses the determined dynamic parameter values and the vendor value for the storage device to determine the storage device weight value, wherein higher preferred vendors have a higher vendor value than lessor preferred vendors.

38 . The system of claim 36 , wherein the operations further comprise:
determining static parameter values indicating vendor supplied information on manufactured characteristics of the storage devices, wherein the function uses at least two of the static parameter values and the dynamic parameter values to determine the storage device weight values.

39 . The system of claim 38 , wherein the function uses one parameter weight value for each of the dynamic and static parameters and applies the parameter weight values f

Assignees

• IBM

Inventors

• Kelkar Bhooshan P
• Patil Sandeep R
• Shiraguppi Riyazahamad M
• Sodhiya Prashant

Classifications

• G06F3/0685 Primary

  Hybrid storage combining heterogeneous device types, e.g. hierarchical storage, hybrid arrays · CPC title

• G06F3/0613 Primary

  in relation to throughput · CPC title

• G06F3/0616

  in relation to life time, e.g. increasing Mean Time Between Failures [MTBF] · CPC title

• G06F3/0688

  Non-volatile semiconductor memory arrays · CPC title

• G06F3/0673

  Single storage device · CPC title