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https://issues.apache.org/jira/browse/BOOKKEEPER-199?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13436659#comment-13436659
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Vinay commented on BOOKKEEPER-199:
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Hi all,

I am thinking of introducing one daemon thread to check the disk periodically. 
We can configure the threshold. If any disk is full more than the threshold, 
then that disk can be excluded from next writes.

Whats your thoughts about this..?
                
> 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: Bug
>          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.

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