Quarantining storage objects using a quarantine list

A computer program product comprising a non-transitory computer-readable storage medium storing a set of instructions, which, when performed by a processing circuitry of a data storage system (DSS), cause the DSS to selectively provide access to multiple storage features of the DSS represented by respective memory-resident storage objects by:

• receiving a first request to access a first storage feature, and, in response, (a) providing access to the first storage feature, including making a first change to metadata describing the first storage feature in its memory-resident storage object, and (b) storing the first changed metadata within a metadata database (MDDB) on first persistent storage of the DSS;
• receiving a second request to access a second storage feature, and, in response:
• providing access to the second storage feature including making a second change to metadata describing the second storage feature in its memory-resident storage object,
• making an attempt to store the second changed metadata within the MDDB on the first persistent storage, the attempt failing, and
• in response to the attempt failing, storing an identifier of the storage object representing the second storage feature to a quarantine list on second persistent storage of the DSS distinct from the first persistent storage;
• and
• subsequently, receiving a third request to access the second storage feature, and, in response:
• finding that the quarantine list identifies the storage object representing the second storage feature and
• in response to finding, denying access to the second storage feature due to it being quarantined.

A data storage system (DSS) comprising:

• a set of persistent storage device that provide first persistent storage;
• second persistent storage distinct from the first persistent storage;
• and
• processing circuitry and memory communicatively-coupled to the first persistent storage and to the second persistent storage, the processing circuitry and memory being configured to selectively provide access to multiple storage features of the DSS represented by respective memory-resident storage objects by:
• receiving a first request to access a first storage feature, and, in response, (a) providing access to the first storage feature, including making a first change to metadata describing the first storage feature in its memory-resident storage object, and (b) storing the first changed metadata within a metadata database (MDDB) on the first persistent storage;
• receiving a second request to access a second storage feature, and, in response:
• providing access to the second storage feature including making a second change to metadata describing the second storage feature in its memory-resident storage object,
• making an attempt to store the second changed metadata within the MDDB on the first persistent storage, the attempt failing, and
• in response to the attempt failing, storing an identifier of the storage object representing the second storage feature to a quarantine list on second persistent storage;
• and
• subsequently, receiving a third request to access the second storage feature, and, in response:
• finding that the quarantine list identifies the storage object representing the second storage feature and
• in response to finding, denying access to the second storage feature due to it being quarantined.