Re: New filesystem for Linux

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On Sat, 4 Nov 2006, Mikulas Patocka wrote:
> If it overflows, it increases crash count instead. So really you have > 2^47
>  transactions or 65536 crashes and 2^31 transactions between each crash.

 it seems to me that you only need to be able to represent a range of the
 most recent 65536 crashes... and could have an online process which goes
 about "refreshing" old objects to move them forward to the most recent
 crash state.  as long as you know the minimm on-disk crash count you can
 use it as an offset.

After 65536 crashes you have to run spadfsck --reset-crash-counts. Maybe I add that functionality to kernel driver too, so that it will be formally corect.

Is there any reason you can not make these fields 64 or even 128 bits in size to increase these "limits" dramatically?


Thanks,

Grzegorz Kulewski

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