Adjustment of volume synchronization

Patent metadata

Field	Value
Publication number	US-9690485-B2
Application number	US-201615255478-A
Country	US
Kind code	B2
Filing date	Sep 2, 2016
Priority date	Aug 11, 2015
Publication date	Jun 27, 2017
Grant date	Jun 27, 2017

Abstract

Embodiments of the present invention provide systems and methods for adjusting synchronization rates of volumes. Volumes and their copies (i.e., mirrored volumes) provide physical or virtual storage on a data storage medium. Depending on the function (i.e., the purpose) of mirrored volumes, a certain synchronization rate is recommended. Embodiments of the present invention provide systems and methods for an automatic dynamic adjustment of individual synchronization rates by adapting to changes in system workloads in order to avoid degradation of user-driven input/output (IO) and to efficiently achieve nearly 100% synchronization for all mirrored volumes.

First claim

What is claimed is:

1. A computer system for adjusting synchronization rates, the computer system comprises:
one or more computer processors;
one or more non-transitory computer readable storage media;
program instructions stored on the one or more non-transitory computer readable storage media for execution by at least one of the one or more processors, the program instructions comprising:
program instructions to configure a set of mirrored volumes based on a set of binary property values and associated priorities, at any given time prior to and after an adjustment of the synchronization rates;
program instructions to copy one or more volumes to result in one or more mirrored volumes, wherein the synchronization rates are adjusted at the same time;
program instructions to evaluate a system performance at a device level, a storage pool level, and a volume level wherein a collected baseline performance is compared to a collected system performance associated with a later point in time;
program instructions to adjust synchronization rates of the one or more mirrored volumes based on impending input/output (IO) changes by retrieving a historic system performance level at the device level, the storage pool level, and the volume level, wherein searches for non-permanent mirror volumes and permanent mirror volumes lead to the decrease of the synchronization rates of low priority, non-permanent mirror volumes and the increase of the synchronization rates of high priority, permanent mirror volumes;
program instructions to re-evaluate a new system performance, in response to adjusting the synchronization rates of the one or more mirrored volumes, by comparing the new collected system performance associated with the later point in time, and determining a current workload after adjusting the synchronization rates of the one or more mirrored volumes; and
program instructions to re-adjust the synchronization rates of the one or more mirrored volumes wherein, a decrease in a new system performance in comparison to the collected baseline performance leads to an increase in the synchronization rates of the one or more mirrored volumes, and an increase in the new system performance in comparison to the collected baseline performance leads to a search for available mirrored volumes.

Assignees

• IBM

Inventors

• Byrd Stephen A
• Colbeck Scott J

Classifications

• G06F3/0668

  adopting a particular infrastructure · CPC title

• G06F3/067

  Distributed or networked storage systems, e.g. storage area networks [SAN], network attached storage [NAS] · CPC title

• G06F3/0619

  in relation to data integrity, e.g. data losses, bit errors · CPC title

• G06F3/0634

  by changing the state or mode of one or more devices · CPC title

• G06F3/0683

  Plurality of storage devices · CPC title