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From "stack (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-48) [hbase] Bulk load tools
Date Fri, 14 Aug 2009 18:13:15 GMT

    [ https://issues.apache.org/jira/browse/HBASE-48?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12743333#action_12743333
] 

stack commented on HBASE-48:
----------------------------

Two things.

1. Manish Shah points out that we need to ensure a total ordering of all keys (See pg.218
of hadoop book and on).  We need to supply a partitioner that does total ordering AND that
ensures we don't partition across rows (Thanks for this Manish).

2. Current patch does not guarantee rows do not span storefiles.

> [hbase] Bulk load tools
> -----------------------
>
>                 Key: HBASE-48
>                 URL: https://issues.apache.org/jira/browse/HBASE-48
>             Project: Hadoop HBase
>          Issue Type: New Feature
>            Reporter: stack
>            Priority: Minor
>         Attachments: 48-v2.patch, 48-v3.patch, 48-v4.patch, 48.patch, loadtable.rb
>
>
> Hbase needs tools to facilitate bulk upload and possibly dumping.  Going via the current
APIs, particularly if the dataset is large and cell content is small, uploads can take a long
time even when using many concurrent clients.
> PNUTS folks talked of need for a different API to manage bulk upload/dump.
> Another notion would be to somehow have the bulk loader tools somehow write regions directly
in hdfs.

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