[BOOKKEEPER-246] Recording of underreplication of ledger entries

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 4.2.0
• Component/s: bookkeeper-auto-recovery
• Assignee: Ivan Kelly
• Reporter: Ivan Kelly
• Created: 09/May/12 15:08
• Updated: 02/May/13 02:29
• Resolved: 14/Aug/12 09:42

Description

This JIRA is to decide how to record that entries in a ledger are underreplicated.

I think there is a common understanding (correct me if im wrong), that rereplication can be broken into two logically distinct phases. A) Detection of entry underreplication & B) Rereplication.

This subtask is to handle the interaction between these two stages. Stage B needs to know what to rereplicate; how should Stage A inform it?

Issue Links

• depends upon: BOOKKEEPER-203 improve ledger manager interface to remove zookeeper dependency on metadata operations.
• is blocked by: BOOKKEEPER-2 bookkeeper does not put enough meta-data in to do recovery properly
• requires: BOOKKEEPER-317 Exceptions for replication
• supercedes: BOOKKEEPER-305 Provide distributed lock implementation which will be used by Replication worker while replicating fragments.