[HDDS-4285] Read is slow due to frequent calls to UGI.getCurrentUser() and getTokens()

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.1.0
• Labels: pull-request-available
• Target Version/s: 1.1.0
• Assignee: Attila Doroszlai
• Reporter: Marton Elek
• Created: 28/Sep/20 14:19
• Updated: 09/Oct/20 21:26
• Resolved: 09/Oct/20 15:29

Description

Ozone read operation turned out to be slow mainly because we do a new UGI.getCurrentUser for block token for each of the calls.

We need to cache the block token / UGI.getCurrentUserCall() to make it faster.

To reproduce:

Checkout: https://github.com/elek/hadoop-ozone/tree/mocked-read

cd hadoop-ozone/client

export MAVEN_OPTS=-agentpath:/home/elek/prog/async-profiler/build/libasyncProfiler.so=start,file=/tmp/profile-%t-%p.svg

mvn compile exec:java -Dexec.mainClass=org.apache.hadoop.ozone.client.io.TestKeyOutputStreamUnit -Dexec.classpathScope=test

Issue Links

• links to: GitHub Pull Request #1454