Deferred reclamation of invalidated entries that are associated with a transaction log in a log-structured array

An article of manufacture comprising a non-transitory processor-readable storage medium having stored therein program code of one or more software programs, wherein the program code is executable by one or more processors to implement a method comprising:

• obtaining a write operation issued by an application, the write operation comprising first data associated with a logical data device of the application;
• storing the first data in a first entry of a log-structured array implemented in at least one storage device of a storage system;
• invalidating a second entry of the log-structured array based at least in part on the storage of the first data in the first entry, the second entry comprising second data that was associated with the logical data device prior to obtaining the write operation;
• determining that a first indication in a first metadata indicates that the invalidated second entry corresponds to a transaction log of the application;
• and
• deferring reclamation of the second entry based at least in part on the determination that the first indication in the first metadata indicates that the invalidated second entry corresponds to the transaction log of the application;
• wherein the first indication in the first metadata indicating that the invalidated second entry corresponds to the transaction log further indicates that the invalidated second entry is being utilized to provide at least a portion of a logical log device that is distinct from the logical data device.

A server node, comprising:

• at least one processor;
• and
• system memory configured to store program code, wherein the program code is executable by the at least one processor to implement a storage control system which is configured to:
• obtain a write operation issued by an application, the write operation comprising first data associated with a logical data device of the application;
• store the first data in a first entry of a log-structured array implemented in at least one storage device of a storage system;
• invalidate a second entry of the log-structured array based at least in part on the storage of the first data in the first entry, the second entry comprising second data that was associated with the logical data device prior to obtaining the write operation;
• determine that a first indication in a first metadata indicates that the invalidated second entry corresponds to a transaction log of the application;
• and
• defer reclamation of the second entry based at least in part on the determination that the first indication in the first metadata indicates that the invalidated second entry corresponds to the transaction log of the application;
• wherein the first indication in the first metadata indicating that the invalidated second entry corresponds to the transaction log further indicates that the invalidated second entry is being utilized to provide at least a portion of a logical log device that is distinct from the logical data device.