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https://issues.apache.org/jira/browse/JAMES-2082?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Antoine Duprat closed JAMES-2082.
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> Split and Stream blobs from message
> -----------------------------------
>
> Key: JAMES-2082
> URL: https://issues.apache.org/jira/browse/JAMES-2082
> Project: James Server
> Issue Type: Task
> Reporter: Quynh Nguyen
>
> We need to optimise our Message storage.
> Currently, reading messages even with FetchType.Metadata is very inefficient,
> as Blob is stored with the data. This makes IMAP requests like *UID FETCH
> 1:\* UID* very inefficient and actually overload the cluster.
> This task should write a new CassandraMessageDaoV2 that stores streamable
> blobs in a separate table.
> Introduce you DAO on the top of:
> - A new table for messages
> - A new table for blobs
> - A new table for blobParts
> Make CassandraMessage\*Mapper:
> - Write to CassandraMessageDaoV2
> - READ from CassandraMessageDaoV2 and if not found, READ from
> CassandraMessageDaoV1
> When reading from CassandraMessageDaoV1, you should take care to to *on the
> fly* migration:
> - Read from CassandraMessageDaoV1
> - Write in CassandraMessageDaoV2
> - (Delete for space concerns) from CassandraMessageDaoV1
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