Interrupted replicated write recognition

A computer program product for executing operation requests within a data storage system, the 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 instructions to:
• format one or more storage devices and selecting one or more labeled replicas and one or more distinguished replicas;
• receive an operation request with respect to a set of data blocks within the one or more formatted storage devices;
• identify a preferred replica corresponding to the received operation request;
• determine whether the replication-pending bits for the preferred replica are set;
• and
• responsive to determining that the replication-pending bits for the preferred replica are set, execute the received operation request with respect to the corresponding distinguished replica.

A computer implemented method for executing writes with respect to a data storage system, the method comprising:

• receiving a request to execute a write operation with respect to data stored on one or more storage devices;
• identifying one or more block addresses corresponding to a distinguished replica and a labeled replica corresponding to one or more data blocks affected by the write operation;
• setting one or more replication-pending bits with respect to the labeled replica, wherein the replication-pending bits indicate an incomplete write request;
• writing data to both the labeled replica and the distinguished replica corresponding to the data blocks altered by the write operation;
• and
• clearing the one or more replication-pending bits with respect to the labeled replica to indicate the completion of the write operation.

A computer system for executing writes with respect to a data storage system, the 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 instructions to:
• receive a request to execute a write operation with respect to data stored on one or more storage devices;
• identify one or more block addresses corresponding to a distinguished replica and a labeled replica corresponding to one or more data blocks affected by the write operation;
• set one or more replication-pending bits with respect to the labeled replica, wherein the replication-pending bits indicate an incomplete write request;
• write data to both the labeled replica and the distinguished replica corresponding to the data blocks altered by the write operation;
• and
• clear the one or more replication-pending bits with respect to the labeled replica to indicate the completion of the write operation.

A computer implemented method for executing a read operation with respect to a data storage system, the method comprising:

• receiving a read request with respect to one or more data blocks stored in the data storage device;
• identifying a distinguished replica and a labeled replica corresponding to the one or more data blocks indicated by the received read request;
• identifying a preferred replica with respect to the received read request and the one or more data blocks;
• determining whether a replication-pending bit is set with respect to the identified preferred replica;
• and
• responsive to determining that the replication-pending bit is set with respect to the preferred replica, executing the read request with respect to the corresponding distinguished replica.