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https://issues.apache.org/jira/browse/MAILBOX-44?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13049949#comment-13049949
]
Norman Maurer commented on MAILBOX-44:
--------------------------------------
@Stack:
Hope this makes it more clear:
messagesMetaData(CF): {
mailboxId/uid: {
uid: 1,
mailboxId: 184e-ske1-igk2-gj71
flags.recent: true,
flags.deleted: true,
flags.seen: true,
flags.deleted: false,
flags.seen: false,
flags.flagged: true,
bodyOctets: 19484
fullContentOctets: 10304
properties: namespace::localname::value;;namespace2::localname2::value2
headers: byte[],
mediaType: text,
subType: plain,
textualLineCount: 24
}
}
messagesContent(CF): {
mailboxId/uid: {
1: byte[],
2: byte[],
3: byte[]
}
}
The I have secondary indexes on the messagesMetaData CF to be able to get all
messages which belongs to mailbox X and have the deleted flag set etc.
I used RP and used the secondary indexes for "filter" the right messages.
Does it explain it a bit more ?
> [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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