metron-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From cestella <>
Subject [GitHub] incubator-metron issue #257: METRON-426: Stellar does not support scientific...
Date Fri, 16 Sep 2016 14:09:19 GMT
Github user cestella commented on the issue:
    The issue around the `StellarScientificTest` change is that merging t-digests is not precisely
the same as adding the same data to one t-digest.  Whether this is a bug in the t-digest code
or whether it's an artifact of the theory, I don't know.  Because this test is using low amounts
of data, it's prone to a bit of jitter it seems and the compression level specified before
isn't sufficient to ensure that the epsilon chosen (1e-2) is sufficient for repeated runs.
 I tightened up the compression level to 150 (which is still quite sensible) to make sure
we can support at least 1e-2 accuracy for normally distributed data across 100 runs of 1000

If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at or file a JIRA ticket
with INFRA.

View raw message