GitHub user mars opened a pull request:
https://github.com/apache/incubator-predictionio/pull/424
Implement Storage app & channel name-to-ID cache
When stress testing the Universal Recommender with high-concurrency
HTTP/REST queries, we observed that Elasticsearch traffic was majority composed
of requests resolving the Storage app's name & channel, over and over and over
again! In this case, [each per-query call to
`LEventStore.findByEntity`](https://github.com/heroku/predictionio-engine-ur/blob/master/src/main/scala/URAlgorithm.scala#L694)
re-resolves the app name to an ID.
This changeset implements memoization for the function that performs these
name-to-ID lookups, so that only one set of lookups is performed per process
for each app+channel combination. As a result, we've seen overall throughput
increase ð and error rate drop dramatically ð.
This common optimization effects all storage backends, not just
Elasticsearch.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/mars/incubator-predictionio
cache-storage-name-to-id
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/incubator-predictionio/pull/424.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #424
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commit 9825ae2a6981431ce49a6ea40ddabd82ab4121f2
Author: Mars Hall <m...@heroku.com>
Date: 2017-08-22T18:48:04Z
Implement Storage app & channel name-to-ID cache
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