#8677: race condition creating dirs during Sage build on RH 5.4
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Reporter: GeorgSWeber | Owner: GeorgSWeber
Type: defect | Status: needs_review
Priority: blocker | Milestone: sage-4.6
Component: build | Keywords:
Author: William Stein | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
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Comment(by vbraun):
Replying to [comment:8 was]:
> Are you just making this up, or?!
Thats what the aforementioned FAQ says:
{{{
For the Linux implementation of NFS Version 3, using the "async" export
option to allow faster writes is no longer necessary. NFS Version 3
explicitly allows a server to reply before writing data to disk, under
controlled circumstances.
}}}
> I strongly disagree. I see no point in not including the
> if not os.path.exists(dirname):
The point is that the pattern "if (look at filesystem) then (modify
filesystem)" is fundamentally flawed. Its the origin of countless security
problems from temp races etc. The world is a better place without it :-)
And the only way to make it die is to stomp it out wherever we encounter
it...
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/8677#comment:9>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
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