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From "Thomas Mueller (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (OAK-56) File system abstraction
Date Tue, 10 Apr 2012 13:13:17 GMT
File system abstraction

                 Key: OAK-56
                 URL: https://issues.apache.org/jira/browse/OAK-56
             Project: Jackrabbit Oak
          Issue Type: Improvement
          Components: core, mk
            Reporter: Thomas Mueller
            Assignee: Thomas Mueller
            Priority: Minor

A file system abstraction allows to add new features (cross cutting concerns) in a modular
way, for example:

- detection and special behavior of out-of-disk space situation
- profiling and statistics over JMX
- re-try on file system problems
- encryption
- file system monitoring
- replication / real-time backup on the file system level (for clustering)
- caching (improved performance for CRX)
- allows to easily switch to faster file system APIs (FileChannel, memory mapped files)
- debugging (for example, logging all file system operations)
- allows to implement s3 / hadoop / mongodb / ... file systems - not only by us but from 3th
party, possibly the end user
- zip file system (for example to support read-only, compressed repositories)
- testing: simulating out of disk space and out of memory (ensure the repository doesn't corrupt
in this case)
- testing: simulate very large files (using an in-memory file system)
- splitting very large files in 2 gb blocks (FAT and other file systems that don't support
large files)
- data compression (if needed)

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