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From "Ted Yu (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-3488) Allow RowCounter to retrieve multiple versions of rows
Date Sat, 19 Mar 2011 00:01:29 GMT

    [ https://issues.apache.org/jira/browse/HBASE-3488?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13008687#comment-13008687
] 

Ted Yu commented on HBASE-3488:
-------------------------------

R1:CF1:name and R2:CF1:name are the same column.

>> Do you mean to assume that all rows (R1..Rn) will have a CF, CF1 with ck where (k
= 1..20)
I meant you can associate columns ck (k=1..m) with CF1 and columns cl (l=m+1..n) with CF2
for clarity. In reality columns of different column families may have the same name.

Listing count of versions should be enough for individual columns.

> Allow RowCounter to retrieve multiple versions of rows
> ------------------------------------------------------
>
>                 Key: HBASE-3488
>                 URL: https://issues.apache.org/jira/browse/HBASE-3488
>             Project: HBase
>          Issue Type: Bug
>          Components: util
>    Affects Versions: 0.90.0
>            Reporter: Ted Yu
>             Fix For: 0.92.0
>
>
> Currently RowCounter only retrieves latest version for each row.
> Some applications would store multiple versions for the same row.
> RowCounter should accept a new parameter for the number of versions to return.
> Scan object would be configured with version parameter (for scan.maxVersions).
> Then the following API should be called:
> {code}
>   public KeyValue[] raw() {
> {code}

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