US 8,949,488 B2 · Data replication with dynamic compression

Abstract

A method for replicating data between two or more network connected data storage devices, the method including dynamically determining whether to compress data prior to transmitting across the network based, at least in part, on bandwidth throughput between the network connected data storage devices. If it has been determined to compress the data, the method involves compressing the data and transmitting the compressed data over the network. If it has been determined not to compress the data, the method involves transmitting the data, uncompressed, over the network. Dynamically determining whether to compress data may include comparing bandwidth measurements with a predetermined policy defining when compression should be utilized. In some embodiments, the policy may define that compression should be utilized when an estimated time for compressing the data and transmitting the compressed data is less than an estimated time for transmitting the data uncompressed.

Claims19

Dependent claims

A method for replicating data between two or more network connected data storage devices in a data storage subsystem, the method comprising:

dynamically determining whether to compress data prior to transmitting across the network from a first network connected data storage device to a second network connected data storage device based on a policy, the policy based, at least in part, on bandwidth throughput between the first and second network connected data storage devices, an estimated data compression time for the data, and an estimated reduction in size of the data after compression;
and
if it has been determined to compress the data, compressing the data and transmitting the compressed data from the first network connected data storage device to the second network connected data storage device;
else if it has been determined not to compress the data, transmitting the data, uncompressed, from the first network connected data storage device to the second network connected data storage device.

1 more element

An information handling system comprising:

a first data storage site configured to transmit data over a computer network to a second data storage site for replication at the second data storage site, the first data storage site being further configured to dynamically determine whether to compress data prior to transmitting across the network based on a policy, the policy based, at least in part, on a measured bandwidth throughput between the first and second network connected data storage devices and an estimated data compression time for the data, wherein
if it has been determined to compress the data, the first data storage site is configured to compress the data and transmit the compressed data over the network;
else if it has been determined not to compress the data, the first data storage site is configured to transmit the data, uncompressed, over the network;
and wherein at least a portion of compressed data transmitted over the computer network to the second data storage site for replication is stored at the second data storage site in its compressed format until a request for access to that data is received.

1 more element

Dependencies are inferred from the claim text.

Data replication with dynamic compression

Life of this patent

Data replication with dynamic compression

Life of this patent

Abstract

Claims19