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From "Subbu M Iyer (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-3488) Allow RowCounter to retrieve multiple versions of rows
Date Mon, 04 Apr 2011 18:12:05 GMT

    [ https://issues.apache.org/jira/browse/HBASE-3488?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13015525#comment-13015525
] 

Subbu M Iyer commented on HBASE-3488:
-------------------------------------

1. To run the cellcounter with default row/cf/qualifier separator ':' for table 'planet'

java -cp ./conf:./hbase-0.91.0-SNAPSHOT.jar:./lib/hadoop-0.20.1-core.jar:./lib/commons-logging-1.1.1.jar:./lib/commons-cli-1.2.jar:./lib/zookeeper-3.3.2.jar:./lib/log4j-1.2.16.jar:./lib/commons-httpclient-3.1.jar
org.apache.hadoop.hbase.mapreduce.CellCounter planet /work/HBaseExport/cellcounter30


2. To run the cellcounter with row/cf/qualifier separator '%' for table 'planet'

java -cp ./conf:./hbase-0.91.0-SNAPSHOT.jar:./lib/hadoop-0.20.1-core.jar:./lib/commons-logging-1.1.1.jar:./lib/commons-cli-1.2.jar:./lib/zookeeper-3.3.2.jar:./lib/log4j-1.2.16.jar:./lib/commons-httpclient-3.1.jar
org.apache.hadoop.hbase.mapreduce.CellCounter planet /work/HBaseExport/cellcounter31 % 

3. To run the cellcounter with default row/cf/qualifier separator '%' for table 'planet' with
a prefix filter row_55

java -cp ./conf:./hbase-0.91.0-SNAPSHOT.jar:./lib/hadoop-0.20.1-core.jar:./lib/commons-logging-1.1.1.jar:./lib/commons-cli-1.2.jar:./lib/zookeeper-3.3.2.jar:./lib/log4j-1.2.16.jar:./lib/commons-httpclient-3.1.jar
org.apache.hadoop.hbase.mapreduce.CellCounter planet /work/HBaseExport/cellcounter31 % row_55


4. To run the cellcounter with row/cf/qualifier separator '%' for table 'planet' with a regex
filter ^11

java -cp ./conf:./hbase-0.91.0-SNAPSHOT.jar:./lib/hadoop-0.20.1-core.jar:./lib/commons-logging-1.1.1.jar:./lib/commons-cli-1.2.jar:./lib/zookeeper-3.3.2.jar:./lib/log4j-1.2.16.jar:./lib/commons-httpclient-3.1.jar
org.apache.hadoop.hbase.mapreduce.CellCounter planet /work/HBaseExport/cellcounter31 % ^11

> 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
>
>         Attachments: 3488-Allow_RowCounter_to_retrieve_multiple_versions_of_rows-version2.patch,
3488-Allow_RowCounter_to_retrieve_multiple_versions_of_rows.patch
>
>
> 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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