Efficient operations using assistance from secondary site

A computer readable storage medium storing instructions executable by a computer system to perform a method, wherein

• the computer system is contained in a first secondary node in data communication with a primary node,
• the primary node comprises a first server and stores a data volume,
• the first secondary node comprises a second server and a first replica of the data volume, and the method comprises:
• receiving modified data of the data volume from the primary node;
• overwriting data of the first replica with the modified data;
• processing the modified data to generate processed data;
• the first secondary node transmitting the processed data to the primary node;
• the primary node receiving and transmitting the processed data to a second secondary node, wherein the second secondary node comprises a second replica of the data volume and the second secondary node comprises a third server;
• and
• the second secondary node receiving and storing the processed data in memory.

A computer readable storage medium storing instructions executable by a computer system to perform a method, wherein

• the computer system is contained in a first secondary node in data communication with a primary node,
• the primary node comprises a data volume,
• the first secondary node comprises a first replica of the data volume, and
• the method comprises:
• receiving modified data of the data volume from the primary node;
• overwriting data of the first replica with the modified data;
• processing the modified data to generate processed data, wherein the modified data is processed according to a data compression algorithm;
• the first secondary node transmitting the processed data to the primary node;
• reading data from the first replica;
• processing the modified data and the data read from the first replica according to the data compression algorithm to generate the processed data.

A computer readable storage medium storing instructions executable by a computer system to perform a method, wherein

• the computer system is contained in a first secondary node in data communication with a primary node,
• the primary node comprises a data volume,
• the first secondary node comprises a first replica of the data volume, and
• the method comprises:
• receiving modified data of the data volume from the primary node;
• overwriting data of the first replica with the modified data;
• processing the modified data to generate processed data, wherein the modified data is processed according to a checksum algorithm;
• the first secondary node transmitting the processed data to the primary node;
• reading data from the first replica;
• processing the modified data and the data read from the first replica according to the checksum algorithm to generate the processed data.

A computer readable storage medium storing instructions executable by a computer system to perform a method, wherein

• the computer system is contained in a first secondary node in data communication with a primary node,
• the primary node comprises a data volume,
• the first secondary node comprises a first replica of the data volume, and
• the method comprises:
• receiving modified data of the data volume from the primary node;
• overwriting data of the first replica with the modified data;
• processing the modified data to generate processed data, wherein the modified data is processed according to a data encryption algorithm;
• and
• the first secondary node transmitting the processed data to the primary node.

A computer readable storage medium storing instructions executable by a computer system to perform a method, wherein

• the computer system is contained in a first secondary node in data communication with a primary node,
• the primary node comprises a data volume,
• the first secondary node comprises a first replica of the data volume, and
• the method comprises:
• receiving modified data of the data volume from the primary node;
• overwriting data of the first replica with the modified data;
• processing the modified data to generate processed data, wherein the modified data is processed according to a difference computation algorithm;
• the first secondary node transmitting the processed data to the primary node;
• reading data from the first replica;
• processing the modified data and the data read from the first replica according to the difference computation to generate the processed data.

A data system comprising:

• a primary node in data communication with first and second secondary nodes via first and second communication links, respectively, wherein the primary node, first secondary node, and second secondary node comprise a first, second, and third server respectively;
• the primary node comprising a data volume;
• the first and second secondary nodes comprising first and second replicas, respectively, of the data volume;
• a primary node comprising means for transmitting modified data of the data volume to the first secondary node;
• the first secondary node comprising means for receiving and processing the modified data to generate processed data;
• the first secondary node comprising means for transmitting the processed data to the primary node;
• the primary node comprising means for receiving and transmitting the processed data to the second secondary node;
• the second secondary node receiving and storing the processed data in memory.

A method comprising:

• modifying data of a data volume to create modified data;
• a primary node, comprising a first server, transmitting the modified data to a first secondary node, wherein the first secondary node comprises a first replica of the data volume and the first secondary node comprises a second server;
• the first secondary node receiving and processing the modified data to generate processed data, wherein processing data includes counting the number of transactions generated to write data to a hard disk allocated to store data of the data volume replica in a given period of time;
• transmitting the processed data to the primary node, wherein the primary node comprises the data volume;
• storing the processed data in memory.

A method comprising:

• modifying data of a data volume to create modified data;
• a primary node, comprising a first server, transmitting the modified data to a first secondary node, wherein the first secondary node comprises a first replica of the data volume and the first secondary node comprises a second server;
• the first secondary node receiving and processing the modified data to generate processed data, wherein processing data includes identifying the number of times an access time stamp changes in a given period of time;
• transmitting the processed data to the primary node,
• wherein the primary node comprises the data volume;
• storing the processed data in memory.