Re: [ANNOUNCE] DualFS: File System with Meta-data and Data Separation

From: Bill Davidsen
Date: Sat Feb 17 2007 - 13:08:40 EST

JÃrn Engel wrote:
On Fri, 16 February 2007 18:47:48 -0500, Bill Davidsen wrote:
Actually I am interested in the common case, where the machine is not out of space, or memory, or CPU, but when it is appropriately sized to the workload. Not that I lack interest in corner cases, but the "running flat out" case doesn't reflect case where there's enough hardware, now the o/s needs to use it well.

There is one detail about this specific corner case you may be missing.
Most log-structured filesystems don't just drop in performance - they
can run into a deadlock and the only recovery from this is the lovely
backup-mkfs-restore procedure.
I missed that. Which corner case did you find triggers this in DualFS?
If it was just performance, I would agree with you.

bill davidsen <davidsen@xxxxxxx>
CTO TMR Associates, Inc
Doing interesting things with small computers since 1979

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at