Comment 4 for bug 1017113

fwiw, i'm experimenting atm with a small test runner change/diff to disable
zk fsync
http://paste.ubuntu.com/1057627/
-k

On Sun, Jun 24, 2012 at 10:58 AM, Clint Byrum <email address hidden> wrote:

> Hi Martin. These are basically timeouts because each test needs to
> finish in less than 5 seconds. Some of them take 1 - 2 seconds normally,
> so if your system gets busy for a second, that can be enough to push a
> few of them over 5 seconds.
>
> A few tips:
>
> 1) I use sbuild, not pbuilder. If you use the 'mk-sbuild' script to
> build your chroot, you can pass it --eatmydata, which will help a lot.
> The tests run zookeeper, which fsyncs every write to disk. --eatmydata
> sets up your schroot to run everything inside 'eatmydata' which
> disables fsync and so de-couples your build from having to flush to
> disk.
>
> 2) If you have access to a machine with an SSD, that also helps a lot.
> On a non-SSD box, the tests take 7 minutes. With eatmydata, that drops
> to 5. With an SSD machine those numbers are cut in half. Thus, each
> tests is faster and so has less chance to cross over 5 seconds.
>
> Anyway, I think this is worth re-titling to "test suite fails
> sporadically" and mark as an upstream bug.
>
> ** Summary changed:
>
> - FTBFS: Sveral tests fails
> + Juju test suite fails sporadically due to low timeouts
>
> ** Changed in: juju (Ubuntu)
> Status: Confirmed => Triaged
>
> ** Also affects: juju
> Importance: Undecided
> Status: New
>
> ** Changed in: juju
> Status: New => Confirmed
>
> ** Changed in: juju (Ubuntu)
> Importance: Undecided => Medium
>
> ** Changed in: juju
> Importance: Undecided => Medium
>
> --
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> https://bugs.launchpad.net/bugs/1017113
>
> Title:
> Juju test suite fails sporadically due to low timeouts
>
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