[jira] [Commented] (BOOKKEEPER-199) Provide bookie readonly mode, when journal/ledgers flushing has failed with IOE

["Rakesh R (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/BOOKKEEPER-199?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13416019#comment-13416019 ] 

Rakesh R commented on BOOKKEEPER-199:
-------------------------------------

Thanks all for your time and inputs. Based on the discussion which we had in this jira, identified the following subtasks to implement the r-o mode incrementally.

# Utility functions for checking disk problem
# Detect IOExceptions on entrylogger and bookie should consider next ledger dir(if any)
# Detect IOExceptions on ledger cache and bookie should consider next ledger dir(if any)
# Provide mechanism to detect r-o bookie by the bookie clients
# Provide admin command to start the bookie in read-only mode (Raised as a suggestion)

-Rakesh

                
> Provide bookie readonly mode, when journal/ledgers flushing has failed with IOE
> -------------------------------------------------------------------------------
>
>                 Key: BOOKKEEPER-199
>                 URL: https://issues.apache.org/jira/browse/BOOKKEEPER-199
>             Project: Bookkeeper
>          Issue Type: Sub-task
>          Components: bookkeeper-server
>    Affects Versions: 4.0.0
>            Reporter: Rakesh R
>            Assignee: Rakesh R
>            Priority: Critical
>             Fix For: 4.2.0
>
>         Attachments: BOOKKEEPER-199.patch
>
>
> Bookkeeper should change to readonly(r-o) mode when the journal/ledgers flushing has failed with IOException. Later on, reject write requests on server side and will accept only the read requests from the clients, because even if flushing fails, the data in the bookie which has been flushed is still valid.

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira