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Hudson commented on HBASE-16091: -------------------------------- Results for branch branch-1.3 [build #576 on builds.a.o|https://builds.apache.org/job/HBase%20Nightly/job/branch-1.3/576/]: (x) *{color:red}-1 overall{color}* ---- details (if available): (/) {color:green}+1 general checks{color} -- For more information [see general report|https://builds.apache.org/job/HBase%20Nightly/job/branch-1.3/576//General_Nightly_Build_Report/] (/) {color:green}+1 jdk7 checks{color} -- For more information [see jdk7 report|https://builds.apache.org/job/HBase%20Nightly/job/branch-1.3/576//JDK7_Nightly_Build_Report/] (x) {color:red}-1 jdk8 hadoop2 checks{color} -- For more information [see jdk8 (hadoop2) report|https://builds.apache.org/job/HBase%20Nightly/job/branch-1.3/576//JDK8_Nightly_Build_Report_(Hadoop2)/] (/) {color:green}+1 source release artifact{color} -- See build output for details. > Canary takes lot more time when there are delete markers in the table > --------------------------------------------------------------------- > > Key: HBASE-16091 > URL: https://issues.apache.org/jira/browse/HBASE-16091 > Project: HBase > Issue Type: Bug > Components: canary > Affects Versions: 2.0.0 > Reporter: Vishal Khandelwal > Assignee: Vishal Khandelwal > Priority: Major > Fix For: 1.4.0, 0.98.21, 1.3.3, 2.0.0 > > Attachments: HBASE-16091.00.patch, HBASE-16091.01.patch, > HBASE-16091.02.patch > > > We have a table which has lot of delete markers and we running Canary test on > a regular interval sometimes tests are timing out because to reading first > row would skip all these delete markers. Since purpose of Canary is to find > health of the region, i think keeping raw=true would not defeat the purpose > but provide good perf improvement. > Following are the example of one such scan where > without changing code it took 62.3 sec for onre region scan > 2016-06-23 08:49:11,670 INFO [pool-2-thread-1] tool.Canary - read from > region <tablename>.<region> column family 0 in 62338ms > whereas after setting raw=true, it reduced to 58ms > 2016-06-23 08:45:20,259 INFO [pool-2-thread-1] tests.Canary - read from > region <tablename>.<region> column family 0 in 58ms > Taking this over multiple tables , with multiple region would be a good > performance gain. -- This message was sent by Atlassian JIRA (v7.6.3#76005)