RE: [HACKERS] Proposed WAL changes

[Mikheev, Vadim]

> > I feel that the fact that
> > 
> > WAL can't help in the event of disk errors
> > 
> > is often overlooked.
> 
> This is true in general.  But, nevertheless, WAL can be written to
> protect against predictable disk errors, when possible.  Failing to
> write a couple of disk blocks when the system crashes is a reasonably
> predictable disk error.  WAL should ideally be written to work
> correctly in that situation.

But what can be done if fsync returns before pages flushed?

Vadim

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