Re: fallocate / posix_fallocate for new WAL file creation (etc...)

On 5/30/13 6:49 AM, Robert Haas wrote:
> On Wed, May 29, 2013 at 10:42 AM, Andres Freund <andres@2ndquadrant.com> wrote:
>> So we don't even know whether we can read. I think that means we need to
>> zero the file anyway...
>
> Surely this is undue pessimism.

There have been many occasions where I've found the Linux kernel 
defining support for POSIX behavior with a NOP stub that basically says 
"we should make this work one day".  I don't know whether the fallocate 
code is one of those or a fully implemented call.  Based on that 
history, until I see a reader that validates the resulting files are 
good I have to assume they're not.

-- 
Greg Smith   2ndQuadrant US    greg@2ndQuadrant.com   Baltimore, MD
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