#10098: Flaky doctest in sage/interfaces/expect.py
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Reporter: mpatel | Owner: mvngu
Type: defect | Status: new
Priority: blocker | Milestone: sage-4.6
Component: doctest | Keywords:
Author: | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
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Comment(by drkirkby):
Replying to [comment:3 mpatel]:
> I think this is a filesystem quirk (a problem?), but I'm not sure.
David, Mariah, and Volker, any thoughts?
I tend to agree in this case - it looks like file systems issues.
However, I've seen problems with the pexpect interface on systems which
use local file systems. I'm not convinced it is a very reliable tool
myself.
I made a point on sage-devel half an hour or so ago, but I'll make it
briefly here. The SQlite developers take testing very seriously
http://www.sqlite.org/testing.html
Their test code is more than 600 times as big as code in the SQlite
database!
They advise against the use of NFS as fcntl() file locking is broken on
many NFS implementations.
http://www.sqlite.org/faq.html#q5
My own money would be that if a Sun running Solaris was serving another
Sun running Solaris, it would work! But perhaps I'm biased - I tend to
trust Solaris more than random collections of Linux. (Of course, when
William disabled the ZIL log on a ZFS file system on disk.math to improve
performance, all bets were off. That is well documented to be a bad
policy, and should never be used except for test purposes).
Dave
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/10098#comment:5>
Sage <http://www.sagemath.org>
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