Audit messages and the object lifecycle
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PDFs
Audit messages are generated each time an object is ingested, retrieved, or deleted. You can identify these transactions in the audit log by locating API-specific (S3 or Swift) audit messages.
Audit messages are linked through identifiers specific to each protocol.
| Protocol | Code |
|---|---|
Linking S3 operations |
S3BK (S3 Bucket) and/or S3KY (S3 Key) |
Linking Swift operations |
WCON (Swift Container) and/or WOBJ (Swift Object) |
Linking internal operations |
CBID (Object's Internal Identifier) |
Timing of audit messages
Because of factors such as timing differences between grid nodes, object size, and network delays, the order of audit messages generated by the different services can vary from that shown in the examples in this section.
Information lifecycle management policy configuration
With the default ILM policy (Baseline 2 Copy), object data is copied once for a total of two copies. If the ILM policy requires more than two copies, there will be an additional set of CBRE, CBSE, and SCMT messages for each extra copy. For more information about ILM policies, see information about managing objects with information lifecycle management.
Archive Nodes
The series of audit messages generated when an Archive Node sends object data to an external archival storage system is similar to that for Storage Nodes except that there is no SCMT (Store Object Commit) message, and the ATCE (Archive Object Store Begin) and ASCE (Archive Object Store End) messages are generated for each archived copy of object data.
The series of audit messages generated when an Archive Node retrieves object data from an external archival storage system is similar to that for Storage Nodes except that the ARCB (Archive Object Retrieve Begin) and ARCE (Archive Object Retrieve End) messages are generated for each retrieved copy of object data.
The series of audit messages generated when an Archive Node deletes object data from an external archival storage system is similar to that for Storage Nodes except that there is no SREM (Object Store Remove) message, and there is an AREM (Archive Object Remove) message for each delete request.