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Feature #5158

Objecter: support multi-read-from-replica

Added by Greg Farnum over 6 years ago.

Status:
New
Priority:
Normal
Assignee:
-
Category:
Objecter
Target version:
-
Start date:
05/23/2013
Due date:
% Done:

0%

Source:
Development
Tags:
Backport:
Reviewed:
Affected Versions:
Pull request ID:

Description

Sam pointed out that we could turn our reads into essentially an Available (versus Consistent) model just by turning on read-from-replica, and that we can further handle a down node by requesting from a separate replica after a (very short) timeout.

The use cases for these kinds of features are very narrow, but RGW fits into the niche. It would enhance viability as a web-serving service, since we don't need to wait for full timeout detection and peering if an OSD dies in order to keep serving up object reads.

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