Re: [1/9] pohmelfs: documentation.
From: Pavel Machek <hidden>
Date: 2008-12-28 07:43:56
Also in:
linux-fsdevel, lkml
Hi!
+Homepage: http://www.ioremap.net/projects/pohmelfs + +POHMELFS first began as a network filesystem with coherent local data and +metadata caches but is now evolving into a parallel distributed filesystem. + +Main features of this FS include: + * 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 simple and does not use byte-ranges, although they are sent in + locking messages. + * Completely async processing of all events except creation of hard and symbolic + links, and rename events. + Object creation and data reading and writing are processed asynchronously. + * Flexible object architecture optimized for network processing. + Ability to create long paths to objects and remove arbitrarily huge + directories with a single network command. + (like removing the whole kernel tree via a single network command).
Hmm, so we'll need new unlink_recursively() syscall?
+ * Very high performance.
Do you have some nfs comparison? Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html