Hello. I'm pleased to announce the new POHMELFS release. Short changelog: * Extended attributes. * Distributed locks for metadata updates. * Bug fixes and cleanups ( i n c l u d i n g w h i t e s p a c e s ! ). POHMELFS is a very high performance parallel network filesystem with local coherent cache of data and metadata. Its main goal is distributed processing of the data. Features supported by POHMELFS: * Locally coherent cache for data and metadata with (potentially) byte-range locks. Since all Linux filesystems lock the whole inode during writing, algorithm is very simlpe and does not use byte-ranges, although they are sent in locking messages. * Completely async processing of all events (hard and symlinks are the only exceptions) including object creation and data reading and writing. * Flexible object architecture optimized for network processing. Ability to create long pathes to object and remove arbitrary huge directories in single network command. * High performance is one of the main design goals. * Very fast and scalable multithreaded userspace server. Being in userspace it works with any underlying filesystem and still is much faster than async in-kernel NFS one. * Transactions support. Full failover for all operations. Resending transactions to different servers on timeout or error. * Client is able to switch between different servers (if one goes down, client automatically reconnects to second and so on). * Client parallel extensions: ability to write to multiple servers and balance reading between them. * Client dynamical server reconfiguration: ability to add/remove servers from working set in run-time. * Strong authentification and possible data encryption in network channel. * Extended attributes support. POHMELFS roadmap now includes distributed and parallel facilities of the server. 1. POHMELFS homepage. http://www.ioremap.net/node/21 2. POHMELFS archive. http://www.ioremap.net/archive/pohmelfs/ 3. GIT trees. http://www.ioremap.net/cgi-bin/gitweb.cgi 4. Development status. http://www.ioremap.net/taxonomy/term/4 -- Evgeniy Polyakov -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
