Day 2: BOFs: JFS

Steve Best from IBM gave a BOF on JFS for linux, which was half a conference and half a discussion on IBM's implementation of journaling.

[picture]

Steve first listed the features of JFS:

Support for file sizes up to 512 terabytes (0.5K blocks) to 4 petabytes (4K blocks)
Journaling
Filenames in unicode
B+Tree with extents (variable-length sequence of aggregate blocks allocated as one unit)
Dynamic Inode allocation
Support for symlinks in inodes
Better integration with LVM
Dynamic defragmentation support
Support for both linux and OS/2 partitions (same code)

Then, he gave a status on the current state of the code:
It was first announced on Feb 2nd 2000 at Linuxworld NYC, and since then 10 code releases have been put on the web side. It's still being worked on and it's not ready for production use yet.

What's missing before they can release a JFS alpha is:

fully functional journaling code
case-sensitive support
bug fixes (like rm -rf fails on big directories)

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2000/08/24 (00:48): Version 1.0