On Wed, 26 Aug 2015, Jeff Janes wrote:
Any chance you can share the actual underlying data?
Sure. I added a snapshot to the repo:
https://github.com/job/irrexplorer/blob/master/data/irrexplorer_dump.sql.gz?raw=true
I noticed it wasn't on github, but is that because it is proprietary, or
just because you don't think it is interesting?
I hoped it wouldn't be this complicated :-).
BGP and IRR data is (mostly) public, but it changes constantly, so there
is little sense in putting in the repo, as it is not the authorative
source (we have a script to boostrap with instead).
If you loop over the 732 rows yourself, issuing the simple query against each retrieved constant value:
explain (analyze,buffers) select routes.route from routes where route && $1
Does each one take about the same amount of time, or are there some outlier values which take much more time than the others?
I wrote a small script to try this out. It queries for each route 20 times
to try and suppress the worst noise. I've sorted the results by time and
put it here: https://gist.github.com/htj/1817883f92a9cb17a4f8
(ignore the ntp timing issue causing a negative value)
Some observations:
- v6 is faster than v4 which is expected.
- The slowest prefixes by all seem to start bits '11'.
However it is only by a factor of 1.5x which is not really significant
Best regards, Henrik
Henrik Thostrup Jensen <htj at nordu.net>
Software Developer, NORDUnet
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