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Benjamin Mahler commented on MESOS-2353: ---------------------------------------- How about "caching" the JSON of 'Framework', 'Slave', etc inside the respective structs in the Master, updating it whenever there are changes. We have a similar approach with resource totals, given they are expensive to compute. > Improve performance of the master's state.json endpoint for large clusters. > --------------------------------------------------------------------------- > > Key: MESOS-2353 > URL: https://issues.apache.org/jira/browse/MESOS-2353 > Project: Mesos > Issue Type: Improvement > Components: master > Reporter: Benjamin Mahler > Labels: newbie, scalability, twitter > > The master's state.json endpoint consistently takes a long time to compute > the JSON result, for large clusters: > {noformat} > $ time curl -s -o /dev/null localhost:5050/master/state.json > Mon Jan 26 22:38:50 UTC 2015 > real 0m13.174s > user 0m0.003s > sys 0m0.022s > {noformat} > This can cause the master to get backlogged if there are many state.json > requests in flight. > Looking at {{perf}} data, it seems most of the time is spent doing memory > allocation / de-allocation. This ticket will try to capture any low hanging > fruit to speed this up. Possibly we can leverage moves if they are not > already being used by the compiler. -- This message was sent by Atlassian JIRA (v6.3.4#6332)