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https://issues.apache.org/jira/browse/NUTCH-1180?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13147715#comment-13147715
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Markus Jelsma commented on NUTCH-1180:
--------------------------------------
Config directive:
{code}
<property>
<name>db.preserve.backup</name>
<value>true</value>
<description>If true, updatedb will keep a backup of the previous CrawlDB
version in the old directory. In case of disaster, one can rename old to
current and restore the CrawlDB to its previous state.
</description>
</property>
{code}
Fine? Wrong?
> UpdateDB to backup previous CrawlDB
> -----------------------------------
>
> Key: NUTCH-1180
> URL: https://issues.apache.org/jira/browse/NUTCH-1180
> Project: Nutch
> Issue Type: Improvement
> Reporter: Markus Jelsma
> Assignee: Markus Jelsma
> Priority: Minor
> Fix For: 1.5
>
> Attachments: NUTCH-1180-1.5.-1.patch
>
>
> Nutch currently replaces an existing CrawlDB with the new CrawlDB. By
> optionally keeping a previous version on HDFS users can easily revert in case
> of a mistake without relying on external backup mechanims.
> This should be enabled by default.
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