Method for a network of storage devices

A computer program product comprising:

• one or more computer readable storage media and program instructions stored on the one or more computer readable storage media, the program instructions comprising:
• program instructions to determine that a network congestion occurs in a network, wherein determining the network congestion occurs in the network comprises responsive to receiving a congestion signal of a data link control protocol, program instructions to determine the network congestion occurs in the network, wherein the congestion signal includes at least one of a receive not ready (RNR) signal or an Ethernet Flow control signal, wherein the network enables data communication between nodes and storage devices via a networking device of the network, and wherein the network congestion involves the networking device;
• program instructions to identify at least one data link defined by a node and a storage device each of which having a defined amount of available processing resources;
• and
• program instructions to switch a data access mode for the at least one data link from a normal data access mode to a compressed data access mode, wherein the compressed data access mode enables exchange of compressed data via the at least one data link, wherein the switching is selectively performed for a predefined type of data to be communicated between the node and the storage device of the at least one data link, and wherein the predefined type of data is at least one of a data format and an age of the data.

A computer system comprising:

• one or more computer processors;
• one or more computer readable storage media;
• program instructions stored on the computer readable storage media for execution by at least one of the one or more processors, the program instructions comprising:
• program instructions to determine that a network congestion occurs in a network, wherein determining the network congestion occurs in the network comprises responsive to receiving a congestion signal of a data link control protocol, program instructions to determine the network congestion occurs in the network, wherein the congestion signal includes at least one of a receive not ready (RNR) signal or an Ethernet Flow control signal, wherein the network enables data communication between nodes and storage devices via a networking device of the network, and wherein the network congestion involves the networking device;
• program instructions to identify at least one data link defined by a node and a storage device each of which having a defined amount of available processing resources;
• and
• program instructions to switch a data access mode for the at least one data link from a normal data access mode to a compressed data access mode, wherein the compressed data access mode enables exchange of compressed data via the at least one data link, wherein the switching is selectively performed for a predefined type of data to be communicated between the node and the storage device of the at least one data link, and wherein the predefined type of data is at least one of a data format and an age of the data.