Re: [1/9] pohmelfs: documentation.

Pavel Machek
2008-12-28T07:44:14Z

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
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