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

Bill Davidsen
2007-02-17T18:08:23Z

Jörn 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@tmr.com>
CTO TMR Associates, Inc
Doing interesting things with small computers since 1979