hbase-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Liang Xie (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-9203) Secondary index support through coprocessors
Date Sat, 11 Jan 2014 12:26:52 GMT

    [ https://issues.apache.org/jira/browse/HBASE-9203?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13868757#comment-13868757

Liang Xie commented on HBASE-9203:

to me, one main drawback of this design is the required padding mechanism, for "index name"
section inside index table's row key, maybe we can give a doc to educate end-user,  but other
"indexed column(s) value(s)", are totally depend on real user scenario, e.g. most of indexed
column value probably very short, say "a", and a few long value, say "abode...z", then even
for the short "a" value, based on current design, we still need to pad to sth like "a000..0",
am i correct?   i don't have a better improvement idea through...

> Secondary index support through coprocessors
> --------------------------------------------
>                 Key: HBASE-9203
>                 URL: https://issues.apache.org/jira/browse/HBASE-9203
>             Project: HBase
>          Issue Type: New Feature
>            Reporter: rajeshbabu
>            Assignee: rajeshbabu
>         Attachments: SecondaryIndex Design.pdf, SecondaryIndex Design_Updated.pdf, SecondaryIndex
> We have been working on implementing secondary index in HBase and open sourced  on hbase
0.94.8 version.
> The project is available on github.
> https://github.com/Huawei-Hadoop/hindex
> This Jira is to support secondary index on trunk(0.98).
> Following features will be supported.
> -          multiple indexes on table,
> -          multi column index,
> -          index based on part of a column value,
> -          equals and range condition scans using index, and
> -          bulk loading data to indexed table (Indexing done with bulk load)
> Most of the kernel changes needed for secondary index is available in trunk. Very minimal
changes needed for it.

This message was sent by Atlassian JIRA

View raw message