US 2020/0004649 A1 · TRANSFER TRACK FORMAT INFORMATION FOR TRACKS IN CACHE AT A PRIMARY STORAGE SYSTEM TO A SECONDARY STORAGE SYSTEM TO WHICH TRACKS ARE MIRRORED TO USE AFTER A FAILOVER OR FAILBACK

Abstract

Provided are a computer program product, system, and method to transfer track format information for tracks in cache at a primary storage system to a secondary storage system to which tracks are mirrored to use after a failover or failback. In response to a failover from the primary storage system to the secondary storage system, the primary storage system adds a track identifier of the track and track format information indicating a layout of data in the track, indicated in track metadata for the track in the primary storage, to a cache transfer list. The primary storage system transfers the cache transfer list to the secondary storage system to use the track format information in the cache transfer list for a track staged into the secondary cache having a track identifier in the cache transfer list.

Claims22

Dependent claims

1-23. (canceled)

A computer program product for performing a failover from a primary storage system having a primary cache and a primary storage to a secondary storage system having a secondary cache and a secondary storage, the computer program product comprising a computer readable storage medium having computer readable program code executed in the primary storage system to perform operations, the operations comprising:

in response to failover from the primary storage system to the secondary storage system, for each track in the primary cache, adding a track identifier of the track and track format information indicating metadata of the track, including a layout of data in the track, to a cache transfer list;
and
transferring the cache transfer list to the secondary storage system to cause the secondary storage system to use the track format information transferred with the cache transfer list for a track staged into the secondary cache from the secondary storage having a track identifier in the cache transfer list after the failover.

A primary storage system in communication with a primary storage and secondary storage system having a secondary cache and a secondary storage, comprising:

a processor;
a primary cache;
and
a computer readable storage medium having computer readable program code that when executed by the processor performs operations, the operations comprising:
in response to failover from the primary storage system to the secondary storage system, for each track in the primary cache, adding a track identifier of the track and track format information indicating metadata of the track, including a layout of data in the track, to a cache transfer list;
and
transferring the cache transfer list to the secondary storage system to cause the secondary storage system to use the track format information transferred with the cache transfer list for a track staged into the secondary cache from the secondary storage having a track identifier in the cache transfer list after the failover.

4 more elements

Dependencies are inferred from the claim text.

Transfer track format information for tracks in cache at a primary storage system to a secondary storage system to which tracks are mirrored to use after a failover or failback

Life of this patent

Transfer track format information for tracks in cache at a primary storage system to a secondary storage system to which tracks are mirrored to use after a failover or failback

Life of this patent

Abstract

Claims22