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Re: [linux-lvm] LVM 0.8final for 2.2.15/2.2.16?



On Thu, 8 Jun 2000, Andi Kleen wrote:

> consider a database that uses user space journaling using fsync:
> to make its disk files consistent after the snapshot it requires
> both the log write and the data write. When one is missing the
> log needs to be replayed, which requires writes.

but doesn't the call to block_fsync that Heinz confirmed exists cover
this?

nothing can cover the case where app data consistency depends on a future
write(). But that's the app's problem, and anyway a good database should
be consistent/recover itself if it's died between write(?)'s. right?

(in which case lvm snapshot is perfectly suitable for backing up
databases..)

--paulj





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