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From "Marcio Silva (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ACCUMULO-776) TimestampFilter should serialize start and end as longs in the IteratorSetting
Date Tue, 06 Nov 2012 01:26:12 GMT

    [ https://issues.apache.org/jira/browse/ACCUMULO-776?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13491108#comment-13491108
] 

Marcio Silva commented on ACCUMULO-776:
---------------------------------------

It's described briefly on page 374 of Lars George's [HBase: The Definitive Guide|http://www.hbasebook.com/]
and the schema used for inbox search is also described in this slide deck from QCon London
[HBase @ Facebook|http://qconlondon.com/dl/qcon-london-2011/slides/KannanMuthukkaruppan_HBaseFacebook.pdf]

The basic idea is they build per-user search indices in a single HBase row using the version
to store the message ids.
                
> TimestampFilter should serialize start and end as longs in the IteratorSetting
> ------------------------------------------------------------------------------
>
>                 Key: ACCUMULO-776
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-776
>             Project: Accumulo
>          Issue Type: Bug
>            Reporter: Marcio Silva
>            Assignee: Billie Rinaldi
>            Priority: Minor
>         Attachments: ACCUMULO-776.patch
>
>
> Although the TimestampFilter supports using longs to set the start or end timestamp,
it formats them as strings using SimpleDateFormat when storing or retrieving them in the IteratorSetting.
> This results in exceptions when the timestamps being used aren't able to be formatted
as _yyyyMMddHHmmssz_. For example, try {{setEnd(253402300800001,true)}}
> Instead, {{setStart()}} and {{setEnd()}} could just as easily use {{String.valueOf(long
i)}} to store the values, and {{init()}} could retrieve them using {{Long.valueOf(String s)}}.
 

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