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Posted to dev@bookkeeper.apache.org by "Flavio Junqueira (JIRA)" <ji...@apache.org> on 2012/05/26 20:01:24 UTC
[jira] [Commented] (BOOKKEEPER-272) Introduce chain of bookies for
distributing the re-replication
[ https://issues.apache.org/jira/browse/BOOKKEEPER-272?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13284030#comment-13284030 ]
Flavio Junqueira commented on BOOKKEEPER-272:
---------------------------------------------
Hi Rakesh, One clarification. In the design document of BOOKKEEPER-237, we say: _Auditor would be forming the recovery chain based on the myIds added to the ZooKeeper under the zNode /ledgers/bookie/myId_. If the chain is logical and formed through zookeeper, then I don't understand why the auditor needs to be involved in the chain formation. In my understanding of the proposal, the role of the auditor is essentially to assign work (replication) to bookies. What am I missing?
> Introduce chain of bookies for distributing the re-replication
> --------------------------------------------------------------
>
> Key: BOOKKEEPER-272
> URL: https://issues.apache.org/jira/browse/BOOKKEEPER-272
> Project: Bookkeeper
> Issue Type: Sub-task
> Components: bookkeeper-server
> Reporter: Rakesh R
> Assignee: Rakesh R
>
> The idea is to form logical chain and each Bookie will be taking care each other. On any Bookie failure, his neighbour will act and initiate re-replication.
> For example:
> Assume we have 1,2,3,4,5,6 bookies and will be forming the following chain
> 01 <- 02 <- 03 <- 04 <- 05 <- 06 <- 01
> Here, each one should take care of my immediate predecessor node. The lowest node should always care the highest node and is forming the logical closed chain.
> Reference docs attached in BookKeeper-237.
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