Maintaining replication consistency during distribution instance changes

A method comprising:

• obtaining, by a distribution layer of a source system, an input-output operation corresponding to an address;
• identifying, by the distribution layer, a given replication component of a plurality of distributed replication components of the source system that corresponds to the address based at least in part on a distribution instance obtained from a management component of the source system;
• assigning, by the distribution layer, a first distribution identifier corresponding to the distribution instance to the input-output operation;
• providing, by the distribution layer, the obtained input-output operation to the given replication component with the first distribution identifier;
• obtaining, by the given replication component, a second distribution identifier from the management component;
• determining, by the given replication component, whether or not the first distribution identifier is equal to the second distribution identifier;
• and
• performing, by the given replication component, at least one action on the obtained input-output operation based at least in part on the determination of whether or not the first distribution identifier is equal to the second distribution identifier;
• wherein the source system comprises at least one processing device coupled to memory that implements the distribution layer, management component and plurality of distributed replication components and the method is implemented by the source system.

A computer program product comprising a non-transitory processor-readable storage medium having stored therein program code of one or more software programs, wherein the program code when executed by at least one processing device of a source system, the at least one processing device comprising a processor coupled to memory and implementing a distribution layer, a management component and a plurality of distributed replication components:

• causes the distribution layer:
• to obtain an input-output operation corresponding to an address;
• to identify a given replication component of the plurality of distributed replication components that corresponds to the address based at least in part on a distribution instance obtained from the management component;
• to assign a first distribution identifier corresponding to the distribution instance to the input-output operation;
• and
• to provide the obtained input-output operation to the given replication component with the first distribution identifier;
• and
• causes the given replication component:
• to obtain a second distribution identifier from the management component;
• to determine whether or not the first distribution identifier is equal to the second distribution identifier;
• and
• to perform at least one action on the obtained input-output operation based at least in part on the determination of whether or not the first distribution identifier is equal to the second distribution identifier.