[jira] Assigned: (HBASE-47) option to set TTL for columns in hbase

["Andrew Purtell (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HBASE-47?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Andrew Purtell reassigned HBASE-47:
-----------------------------------

    Assignee: Andrew Purtell

> option to set TTL for columns in hbase
> --------------------------------------
>
>                 Key: HBASE-47
>                 URL: https://issues.apache.org/jira/browse/HBASE-47
>             Project: Hadoop HBase
>          Issue Type: New Feature
>          Components: hql, regionserver
>            Reporter: Billy Pearson
>            Assignee: Andrew Purtell
>            Priority: Minor
>             Fix For: 0.2.0
>
>         Attachments: hbase-ttl-0.2-r652401.patch, hbase-ttl-0.2-r652725.patch, hbase-ttl-0.2-r652919.patch
>
>
> I would like to see the option to have a TTL on the columns in hbase this feature could be helpfully in removing stale data from large datasets with out havening to do a full scan of the dataset and then issuing deletes.
> Example 
> Say I am crawling pages and only refreshing pages based on a set score and some pages doe not get updated over X days the old version of the page gets removed from the data set. 
> Say I am striping out links form html and storing them say a link is removed from a page then I would need to issue a delete statement to remove that links form the data set with a ttl the link data would remove its self if not updated in x secs. These are just examples based on crawling like nutch but I can foresee many apps using this option. 
> This is a feature in bigtables thats is handled when bigtable does garbage-collection.

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