The Sun Message Store is the primary Message Store in the Sun Internet Mail release. This provides a significant advance in reliability, performance, and scalability among open systems message stores. The key features of this component are:
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Supported Internet Standards-The Message Store stores any message that conforms to RFC 822 specifications. It recognizes MIME content format and supports direct addressability of any header or body part. It is specifically designed for IMAP4 message access. |
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Reliable Scalable Design-Write-once data store and two-level indexing simplify access, reduce contention, and facilitate multithreading. Committed transactions also facilitate multithreading and ensure that no messages are lost or corrupted. |
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High Storage Efficiency-The Message Store retains exactly one copy of each message, regardless of the number of recipients. |
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Optimized Access-Messages are preparsed and indexed when inserted into the store. No parsing is necessary when messages are accessed. The degree of preparsing is tunable. The benefits of preparsing decrease as message size increases. POP users do not need parsing at all. |
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Optimized Filesystem Usage-Time-based sorting of messages within the data store provides good locality of reference and more effective use of disk caches. |
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Optimized Updates-Once in the store, messages are never modified. Status changes and folder updates are stored in lightweight index files that are rapidly updated. |
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Managed Backup, Migration, Archival, and Purge-Bulk dump and load facility supports backup, restore, and migration of individual users, groups, or entire stores. Deletion and purge tools support archival and guaranteed delete. |