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This is an automatically generated e-mail. To reply, visit:
https://reviews.apache.org/r/41774/
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(Updated Dec. 30, 2015, 12:41 p.m.)
Review request for Ambari, Alejandro Fernandez, Dmytro Grinenko, Jonathan
Hurley, Jayush Luniya, Nate Cole, and Yusaku Sako.
Changes
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Now should be the correct patch
Bugs: AMBARI-14520
https://issues.apache.org/jira/browse/AMBARI-14520
Repository: ambari
Description
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On 900 host cluster the call to install packages took like 3 minutes 20 seconds
which is kind of long.
{noformat}
POST http://perf-a-1:8080/api/v1/clusters/c1/stack_versions
{"ClusterStackVersions":{"stack":"HDP","version":"2.2","repository_version":"2.2.9.0-3393"}}:
{noformat}
Diffs (updated)
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ambari-server/src/main/java/org/apache/ambari/server/controller/AmbariActionExecutionHelper.java
6e7e06b
ambari-server/src/main/java/org/apache/ambari/server/controller/internal/ClusterStackVersionResourceProvider.java
b6ac291
ambari-server/src/main/java/org/apache/ambari/server/controller/internal/HostStackVersionResourceProvider.java
43a4423
ambari-server/src/main/java/org/apache/ambari/server/state/cluster/ClusterImpl.java
3358e8c
ambari-server/src/main/java/org/apache/ambari/server/state/host/HostImpl.java
c56d7ce
Diff: https://reviews.apache.org/r/41774/diff/
Testing
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mvn clean test
Current request execution time: 0m22.678s
With current patch, most time (about 40%) is consumed by
findConfigurationTagsWithOverrides(cluster, hostname), but it seems to be
inevitable even with batching addExecutionCommandsToStage() calls into a single
invocation. I've tried inserting logging statements to verify that number of
invocations equals to number of hosts.
Rest of time is mostly consumed by
org.apache.ambari.server.actionmanager.Stage.addHostRoleExecutionCommand() (20%
of time) and by N invocations of ClustersImpl.getHostsForCluster() (19% of
time). The latter calls can not be cached in method, so I can only rewrite
method signature
AmbariActionExecutionHelper.addExecutionCommandsToStage(ActionExecutionContext,
Stage) and cache it in ClusterStackVersionResourceProvider. Seems to be a bad
deal considering 1-3 seconds (on large clusters ) of performance boost for a
rare call vs readability/maintainability of code.
Thanks,
Dmitro Lisnichenko
