Replicate objects only if `HEAD` response means object missing #23

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opened 2023-01-20 18:54:00 +00:00 by carpawell · 2 comments

carpawell commented

2023-01-20 18:54:00 +00:00

(Migrated from github.com)

Revise replication logic. Currently, any error that is not NotFound leads to replication, even if the HEAD response:

says AccessDenied;
could not answer at all until timeout expiration;
*any other reason that says nothing about object presence*.

That leads to network operations that could be useless. Also if a cluster is under critical load, continuous replication made that even worse.

Maybe that is an arch issue and we should allow SN's HEADs always.

Revise replication logic. Currently, any error that is not `NotFound` leads to replication, even if the `HEAD` response: 1. says `AccessDenied`; 2. could not answer at all until timeout expiration; 3. \*any other reason that says nothing about object presence\*. That leads to network operations that could be useless. Also if a cluster is under critical load, continuous replication made that even worse. Maybe that is an arch issue and we should allow SN's `HEAD`s _always_.

alexvanin commented

2023-01-27 12:18:08 +00:00

(Migrated from github.com)