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From "Sergey Doroshenko (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ZOOKEEPER-784) server-side functionality for read-only mode
Date Sat, 21 May 2011 07:26:47 GMT

    [ https://issues.apache.org/jira/browse/ZOOKEEPER-784?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13037281#comment-13037281
] 

Sergey Doroshenko commented on ZOOKEEPER-784:
---------------------------------------------

Awesome to see this is finally integrated! Thanks Henry for reviewing it again and Ketan for
contributing.

@Benjamin: this change is fully backwards compatible. A client will be able to connect to
read-only server only if it (client) has 'canBeReadOnly' flag (which is off by default) explicitly
set. Old clients won't notice anything, they'll still receive an exception saying there's
no quorum. You can check out http://wiki.apache.org/hadoop/ZooKeeper/GSoCReadOnlyMode, the
design is outlined there.

> server-side functionality for read-only mode
> --------------------------------------------
>
>                 Key: ZOOKEEPER-784
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-784
>             Project: ZooKeeper
>          Issue Type: Sub-task
>          Components: server
>            Reporter: Sergey Doroshenko
>            Assignee: Sergey Doroshenko
>             Fix For: 3.4.0
>
>         Attachments: ZOOKEEPER-784.patch, ZOOKEEPER-784.patch, ZOOKEEPER-784.patch, ZOOKEEPER-784.patch,
ZOOKEEPER-784.patch, ZOOKEEPER-784.patch, ZOOKEEPER-784.patch, ZOOKEEPER-784.patch, ZOOKEEPER-784.patch,
ZOOKEEPER-784.patch, ZOOKEEPER-784.patch, ZOOKEEPER-784.patch, ZOOKEEPER-784.patch
>
>
> As per http://wiki.apache.org/hadoop/ZooKeeper/GSoCReadOnlyMode , create ReadOnlyZooKeeperServer
which comes into play when peer is partitioned.

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