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From "Jonathan Gray (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HBASE-1249) Rearchitecting of server, client, API, key format, etc for 0.20
Date Wed, 18 Mar 2009 22:27:50 GMT

     [ https://issues.apache.org/jira/browse/HBASE-1249?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jonathan Gray updated HBASE-1249:
---------------------------------

    Attachment: HBASE-1249-GetQuery-v1.pdf

This is somewhat related to HBASE-880, but specifically talks about how we will implement
Gets on the server-side.

For each GetX object we have on the client, there will be a corresponding GetXServer object
that will contain any necessary state for processing the request.  In addition, the GetServer
interface will include a very unique and specialized compareTo(KeyValue) method with a range
of return values [-1, 4] as described in the doc.

These GetServer implementations will be where all the specialized server-side logic will live
that allow the different styles of gets to be done in an optimized way.  The bulk of that
logic lives in the column/timestamp comparison in the compareTo.

More information and examples to follow.

> Rearchitecting of server, client, API, key format, etc for 0.20
> ---------------------------------------------------------------
>
>                 Key: HBASE-1249
>                 URL: https://issues.apache.org/jira/browse/HBASE-1249
>             Project: Hadoop HBase
>          Issue Type: Improvement
>            Reporter: Jonathan Gray
>            Priority: Blocker
>             Fix For: 0.20.0
>
>         Attachments: HBASE-1249-GetQuery-v1.pdf, HBASE-1249-StoreFile-v1.pdf
>
>
> To discuss all the new and potential issues coming out of the change in key format (HBASE-1234):
zero-copy reads, client binary protocol, update of API (HBASE-880), server optimizations,
etc...

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