tutorial - Tux3 Versioning Filesystem

"Since everybody seems to be having fun building new filesystems these days, I thought I should join the party, began Daniel Phillips, announcing the Tux3 versioning filesystem. He continued, "Tux3 is a write anywhere, atomic commit, btree based versioning filesystem. As part of this work, the venerable HTree design used in Ext3 and Lustre is getting a rev to better support NFS and possibly become more efficient." Daniel explained:
"The main purpose of Tux3 is to embody my new ideas on storage data versioning. The secondary goal is to provide a more efficient snapshotting and replication method for the Zumastor NAS project, and a tertiary goal is to be better than ZFS."
In his announcement email, Daniel noted that implementation work is underway, "much of the work consists of cutting and pasting bits of code I have developed over the years, for example, bits of HTree and ddsnap. The immediate goal is to produce a working prototype that cuts a lot of corners, for example block pointers instead of extents, allocation bitmap instead of free extent tree, linear search instead of indexed, and no atomic commit at all. Just enough to prove out the versioning algorithms and develop new user interfaces for version control."

The question is of course which file system will make the run: Tux3 is still at the beginning, while Btrfs could see a first beta in the next months. But there are still rumors that ZFS might be released under the GPL, and Hammer could also be implemented for Linux.

Either way, exciting times for file systems on Linux are ahead


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source:http://linuxpoison.blogspot.com/2008/08/13578175805960.html

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