- # Datamanager considers an unreferenced block older than this to be
- # eligible for garbage collection. Therefore, it should never be
- # smaller than the corresponding value used by any local keepstore
- # service (see keepstore -blob-signature-ttl flag). This rule
- # prevents datamanager from trying to garbage-collect recently
- # written blocks while clients are still holding valid signatures.
+ # This must be exactly equal to the -blob-signature-ttl flag used by
+ # keepstore servers. Otherwise, reading data blocks and saving
+ # collections will fail with HTTP 403 permission errors.
+ #
+ # Modifying blob_signature_ttl invalidates existing signatures; see
+ # blob_signing_key note above.