lucene-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Michael McCandless (JIRA)" <j...@apache.org>
Subject [jira] Updated: (LUCENE-1073) Add unit test showing how to do a "live backup" of an index
Date Sun, 02 Dec 2007 20:53:43 GMT

     [ https://issues.apache.org/jira/browse/LUCENE-1073?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Michael McCandless updated LUCENE-1073:
---------------------------------------

    Attachment: LUCENE-1073.take3.patch


Thanks for reviewing Michael!

{quote}
Maybe we should add SnapshotDeletionPolicy to the core (now it's an
inner class in the test case). I bet people would like to use it when
they implement backup functionalities in their apps.
{quote}

OK I think that makes sense.

I also found & fixed some thread safety issues with the test and added
a missing synchronized in DocumentsWriter that the test uncovered.

Attached new patch with these changes.  I plan to commit in a day or
two.


> Add unit test showing how to do a "live backup" of an index
> -----------------------------------------------------------
>
>                 Key: LUCENE-1073
>                 URL: https://issues.apache.org/jira/browse/LUCENE-1073
>             Project: Lucene - Java
>          Issue Type: Improvement
>          Components: Examples
>    Affects Versions: 2.2
>            Reporter: Michael McCandless
>            Assignee: Michael McCandless
>            Priority: Minor
>             Fix For: 2.3
>
>         Attachments: LUCENE-1073.patch, LUCENE-1073.take2.patch, LUCENE-1073.take3.patch
>
>
> The question of how to backup an index comes up every so often on the
> lists.  Backing up and index is also clearly an important fundamental
> admin task that many applications need to do for fault tolerance.
> In the past you were forced to stop & block all changes to your index,
> perform the backup, and then resume changes.  But many applications
> cannot afford a potentially long pause in their indexing.
> With the addition of DeletionPolicy (LUCENE-710), it's now possible to
> do a "live backup", which means backup your index in the background
> without pausing ongoing changes to the index.  This
> SnapshotDeletionPolicy just has to mark the chosen commit point as not
> deletable, until the backup finishes.

-- 
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.


---------------------------------------------------------------------
To unsubscribe, e-mail: java-dev-unsubscribe@lucene.apache.org
For additional commands, e-mail: java-dev-help@lucene.apache.org


Mime
View raw message