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From "stack (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAILBOX-44) [gsoc2011] Design and implement a distributed mailbox using Hadoop
Date Wed, 15 Jun 2011 15:11:47 GMT

    [ https://issues.apache.org/jira/browse/MAILBOX-44?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13049808#comment-13049808
] 

stack commented on MAILBOX-44:
------------------------------

bq. First of welcome :) 

Thank you.

Thats sweet that you have the prior experience hacking this on top of a store already.  I
defer to experience!

Why separate row for message metadata and content if you don't mind me asking rather than
a message per row with say content in one column family and metadata in another (Probably
best to have cells no bigger than N MB in HBase too... we say > 10MB is usually to avoided
so that splitting across cells probably applies to HBase too).

Did you use order preserving partitioner?

Random IMAP querys sounds ugly.

> [gsoc2011] Design and implement a distributed mailbox using Hadoop
> ------------------------------------------------------------------
>
>                 Key: MAILBOX-44
>                 URL: https://issues.apache.org/jira/browse/MAILBOX-44
>             Project: James Mailbox
>          Issue Type: New Feature
>            Reporter: Eric Charles
>            Assignee: Norman Maurer
>              Labels: gsoc2011
>             Fix For: 0.3
>
>
> Context: The mailbox subproject (http://james.apache.org/mailbox/) supports maildir,
SQL database (via JPA) and Java Content Repository (JCR) as technology for mail storage. This
flexibility is achieved thanks to a API design that abstracts mail storage from the mail protocols.
> Task: We need to implement mailbox storage as a distributed system on top of Hadoop HDFS.
The James mailbox API will be used. A first step is to design how to interact with Hadoop
(native api, gora incubator at apache,...) and deal with specific performance questions related
to mail loading/parsing in a distributed system (use map/reduce or not, use existing local
lucene indexes for search,...). The second step is to implement the HDFS mailbox (maildir
mailbox is similar because is stores mails as a file and can be an inspiration). A single
James server will still be deployed because we don't have any distributed UID generation.
> Mentor: eric at apache dot org
> Complexity: medium 

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