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Date: Mon, 26 Dec 2011 13:34:34 +0200
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From: Yaroslav <yarikos@gmail.com>
To: Fans of the OS Plan 9 from Bell Labs <9fans@9fans.net>
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Subject: Re: [9fans] RAID box with plan9 filesystem
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2011/12/25 Aram H=C4=83v=C4=83rneanu <aram.h@mgk.ro>:
>> My experience with fossil has been somewhere between the two,
>> but it's very easy to recover if you're using it with venti.
>
> What does this recovery mean? =C2=A0Does fossil need to be repopulated, a=
n
> O(n) operation, or does it act merely as a cache that gets cold? (an
> O(1) operation).

Fossil is a write cache for venti - "the blocks in the archival
snapshots are moved to Venti". Read requests are proxied for venti.
Recovery means initializing the filesystem using the given vac scrore,
with no implied data transfer - blocks are copied-on-write.

--=20
- Yaroslav