US 2014/0195871 A1 · SYSTEM AND METHOD FOR IMPROVED ERROR RESPONSE IN DATA MIRRORING

Abstract

Systems and methods are provided to improve performance in backup data storage systems by improving response to errors. The system and method provide for transferring data from a primary storage controller to a secondary storage controller, where the secondary storage controller is linked to the primary storage controller by a plurality of links. The system and method includes transmitting a first transaction from the primary storage controller to the secondary storage controller using a first of a plurality of links. Then, in response to the first transaction crossing a first timeout boundary without completing, the system and method includes transmitting a second transaction from the primary storage controller to the secondary storage controller using a second of the plurality of links, the second of the plurality of links preferentially selected to be on a different network failure boundary from the first of the plurality of links.

Claims20

Dependent claims

A method for transferring data from a primary storage controller to a secondary storage controller linked to the primary storage controller by a plurality of links, the method comprising:

transmitting a first transaction from the primary storage controller to the secondary storage controller using a first of a plurality of links, where the plurality of links includes at least two links implemented with at least one different component such that the at least two links are on different network failure boundaries;
and
in response to the first transaction crossing a first timeout boundary without completing:
transmitting a second transaction from the primary storage controller to the secondary storage controller using a second of the plurality of links, the second of the plurality of links preferentially selected to be on a different network failure boundary from the first of the plurality of links.

1 more element

A primary storage controller, the primary storage controller linked to a secondary storage controller by a plurality of links, where the plurality of links includes at least two links implemented with at least one different component such that the at least two links are on different network failure boundaries, wherein the primary storage controller is configured to:

in response to the first transaction crossing a first timeout boundary without completing:
transmit a second transaction from the primary storage controller to the secondary storage controller using a second of the plurality of links, the second of the plurality of links preferentially selected to be on a different network failure boundary from the first of the plurality of links.

A storage system, comprising:

a primary storage controller;
a secondary storage controller;
a plurality of links linking the primary storage controller to the secondary storage controller, where the plurality of links includes at least two links implemented with at least one different component such that the at least two links are on different network failure boundaries
wherein the primary storage controller is configured to:
in response to the first transaction crossing a first timeout boundary without completing:
transmit a second transaction from the primary storage controller to the secondary storage controller using a second of the plurality of links, the second of the plurality of links preferentially selected to be on a different network failure boundary from the first of the plurality of links;
and
in response to the first transaction crossing a second timeout boundary without completing:
retransmit the first transaction from the primary storage controller to the secondary storage controller using the second of the plurality of links, the second of the plurality of links preferentially selected to be on a different network failure boundary from the first of the plurality of links.

6 more elements

Dependencies are inferred from the claim text.

System and method for improved error response in data mirroring

Life of this patent

System and method for improved error response in data mirroring

Life of this patent

Abstract

Claims20