UFS2 with SAN

Julian Elischer julian at elischer.org
Tue Feb 13 19:12:34 UTC 2007


Eric Anderson wrote:
> On 02/13/07 12:09, Ivan Voras wrote:
>> Eric Anderson wrote:
>>
>>> You might look at tdfs (fuse module from Ivan Voras I believe).  It's
>>> probably horribly beta (not knocking it Ivan - I'm sure it's an amazing
>>> start), so lots of testing would need to be done.  It's also most likely
>>> not high performance.
>>
>> Yes, I'm realistic about it - it is "horribly beta" :)
>>
>> Two reasons: one: I couldn't amass enough interested parties to help
>> test it (and possibly work on it), and second: while it's a nice problem
>> to tackle, I don't [yet] need it that badly to start working on it
>> outside of free time). In any case, TDFS doesn't have locking because
>> FUSE doesn't have it (or didn't when I started doing it), so it stays
>> single-writer-multiple-readers until that changes.
>>
>> I'm thinking of re-creating it in kernel mode (and in this form it could
>> also have locking) but not any time soon. Maybe during the summer (SoC?
>> probably.).
>>
> 
> 
> I've thought about this too - and even thought about making it a file 
> system layer, like nullfs, with a network-kernel piece to notify the 
> readers of changes, etc.  I'm not certain if it would work or not..

it will be very interesting to see the outcome from Matt's cluster 
filesystem on Dragonfly.

> 
> Eric
> 
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