US 2008/0168234 A1 · MANAGING WRITE REQUESTS IN CACHE DIRECTED TO DIFFERENT STORAGE GROUPS

Abstract

Provided are a method, system, and article of manufacture for managing write requests in cache directed to different storage groups. A determination is made of a high and low thresholds for a plurality of storage groups configured in a storage, wherein the high and low thresholds for one storage group indicate a high and low percentage of a cache that may be used to store write requests to the storage group. A determination is made of a number of tasks to assign to the storage groups based on the determined high and low thresholds for the storage groups, wherein each task assigned to one storage group destages write requests from the cache to the storage group.

Claims33

Dependent claims

An article of manufacture including code to communicate with a storage and to cause operations to be performed, the operations comprising:

determining a high and low thresholds for a plurality of storage groups configured in a storage, wherein the high and low thresholds for one storage group indicate a high and low percentage of a cache that may be used to store write requests to the storage group;
and
determining a number of tasks to assign to the storage groups based on the determined high and low thresholds for the storage groups, wherein each task assigned to one storage group destages write requests from the cache to the storage group.

A system coupled to a storage, comprising:

a cache;
and
a cache manager in communication with the cache and enabled to perform operations, the operations comprising:
determining a high and low thresholds for a plurality of storage groups configured in the storage, wherein the high and low thresholds for one storage group indicate a high and low percentage of a cache that may be used to store write requests to the storage group;
and
determining a number of tasks to assign to the storage groups based on the determined high and low thresholds for the storage groups, wherein each task assigned to one storage group destages write requests from the cache to the storage group.

3 more elements

A method, comprising:

determining a high and low thresholds for a plurality of storage groups configured in a storage, wherein the high and low thresholds for one storage group indicate a high and low percentage of a cache that may be used to store write requests to the storage group;
and
determining a number of tasks to assign to the storage groups based on the determined high and low thresholds for the storage groups, wherein each task assigned to one storage group destages write requests from the cache to the storage group.

Dependencies are inferred from the claim text.

Facts

Application

11/621,061Filed 8 Jan 2007

Published

10 Jul 2008

Term ends

Not estimatedThe source records don’t support an estimate.

Classification5 codes

G06F 12/0804
Addressing of a memory level in which the access to the desired data or data block requires associative addressing means, e.g. caches: with main…
G06F 12/121
Replacement control: using replacement algorithms
G06F 12/0873
For peripheral storage systems, e.g. disk cache: mapping of cache memory to specific storage devices or parts thereof
G06F 2212/502
Control mechanisms for virtual memory, cache or TLB: using adaptive policy

Managing write requests in cache directed to different storage groups

Life of this patent

Managing write requests in cache directed to different storage groups

Life of this patent

Abstract

Claims33