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A Storage Tiering based solution for selection of LUNs in a mirrored-volume to maximize High Availability.

IP.com Disclosure Number: IPCOM000200499D
Publication Date: 2010-Oct-15
Document File: 5 page(s) / 47K

Publishing Venue

The IP.com Prior Art Database

Abstract

This idea describes an algorithm for tiering the storage connected to the host server over the storage array network, considering the underlying SAN topology. Based on the storage tier ordering obtained, it suggests the LUNs to be selected to create a mirrored logical volume, so as to maximize the high availability of the data to the host server.

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A Storage Tiering based solution for selection of LUNs in a mirrored-volume to maximize High Availability

Krishnasuri Narayanam

Symantec Corporation

Abstract

This idea describes an algorithm for tiering the storage connected to the host server over the storage array network, considering the underlying SAN topology. Based on the storage tier ordering obtained, it suggests the LUNs to be selected to create a mirrored logical volume, so as to maximize the high availability of the data to the host server.

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A Storage Tiering based solution for selection of LUNs in a mirrored-volume to maximize High Availability.

Problem Statement

There are 2 problems that this IDF tries to address.

1) Selection of LUNs, for creating mirrors (or) for placing configuration copies, in a volume manager:

a)      The same data is mirrored on multiple volumes in a volume manager to provide better availability of the data. While selecting the LUNs for these mirrored volumes, choosing the LUNs in such a way that they provide maximum availability is a key challenge. We try to address this problem so that the availability of data to the host server is optimized. If the LUNs are not chosen properly, a single point of failure might cause the loss of access to the entire mirrored volume.

b)      A similar problem in a volume manager solution is that how to distribute the configuration copies of a volume manager over the LUNs connected to the host so that high availability of metadata is provided to the host server.

2) Selection of LUNs based on storage tiering requirement (based on cost and redundancy/based on reliability and performance of storage...