Messages in this thread |  | | Date | Fri, 3 Nov 2006 14:31:46 +0100 (CET) | | From | Mikulas Patocka <> | | | Subject | Re: New filesystem for Linux |
>>> I am fully aware the counters are effectively 48-bit. If they were
>>> just 32-bit, you would likely have hit the problem yourself already.
>>
>> Given the seek time 0.01s, 31-bit value would last for minimum time of 248
>> days when doing only syncs and nothing else. 47-bit value will last for
>> reasonably long.
>
> So you can at most do one transaction per drive seek? That would
> definitely solve the overflow case, but hardly sounds like a
> high-performance filesystem. :)
Really it can batch any number of modifications into one transaction
(unless fsync or sync is called). Transaction is closed only on
fsync/sync, if 2 minutes pass (can be adjusted) or when the disk runs out
of space.
Mikulas
Mikulas
> Jörn
>
> --
> Data expands to fill the space available for storage.
> -- Parkinson's Law
>
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