[Code-review] [PATCH] Maintain a metadata copy outside the index.

[Martin Langhoff]

On Wed, Jun 25, 2008 at 6:55 PM, Benjamin M. Schwartz
<bmschwar at fas.harvard.edu> wrote:
> I agree that it's impractical to hack atomicity into the current system,
> but any future datastore should _definitely_ provide strong
> atomicity/checkpoint guarantees.  Designing this in should not be
> difficult, and even if it is, it is worth doing.

This *is* difficult. A FS that performs great on NAND flash devices
and provides atomicity and checkpointing is not trivial. Keep in mind
that activities do a wide range of FS operations - including capture
and playback of sound and video and large files - so mmap and all the
relevant posix ops need to be there, and be efficient.

cheers,



m
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