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Hadoop QA commented on BOOKKEEPER-429: -------------------------------------- Testing JIRA BOOKKEEPER-429 Patch [0001-BOOKKEEPER-429-Provide-separate-read-and-write-threa.patch|https://issues.apache.org/jira/secure/attachment/12611103/0001-BOOKKEEPER-429-Provide-separate-read-and-write-threa.patch] downloaded at Wed Oct 30 16:12:19 UTC 2013 ---------------------------- {color:green}+1 PATCH_APPLIES{color} {color:green}+1 CLEAN{color} {color:green}+1 RAW_PATCH_ANALYSIS{color} . {color:green}+1{color} the patch does not introduce any @author tags . {color:green}+1{color} the patch does not introduce any tabs . {color:green}+1{color} the patch does not introduce any trailing spaces . {color:green}+1{color} the patch does not introduce any line longer than 120 . {color:green}+1{color} the patch does adds/modifies 3 testcase(s) {color:green}+1 RAT{color} . {color:green}+1{color} the patch does not seem to introduce new RAT warnings {color:green}+1 JAVADOC{color} . {color:green}+1{color} the patch does not seem to introduce new Javadoc warnings {color:green}+1 COMPILE{color} . {color:green}+1{color} HEAD compiles . {color:green}+1{color} patch compiles . {color:green}+1{color} the patch does not seem to introduce new javac warnings {color:green}+1 FINDBUGS{color} . {color:green}+1{color} the patch does not seem to introduce new Findbugs warnings {color:red}-1 TESTS{color} . Tests run: 886 . Tests failed: 0 . Tests errors: 3 . The patch failed the following testcases: . {color:green}+1 DISTRO{color} . {color:green}+1{color} distro tarball builds with the patch ---------------------------- {color:red}*-1 Overall result, please check the reported -1(s)*{color} The full output of the test-patch run is available at . https://builds.apache.org/job/bookkeeper-trunk-precommit-build/526/ > Provide separate read and write threads in the bookkeeper server > ---------------------------------------------------------------- > > Key: BOOKKEEPER-429 > URL: https://issues.apache.org/jira/browse/BOOKKEEPER-429 > Project: Bookkeeper > Issue Type: Improvement > Components: bookkeeper-server > Affects Versions: 4.2.0 > Reporter: Aniruddha > Assignee: Aniruddha > Fix For: 4.3.0 > > Attachments: > 0001-BOOKKEEPER-429-Provide-separate-read-and-write-threa.patch, > BK-429.patch, BOOKKEEPER-429.diff, BOOKKEEPER-429.diff > > > The current bookkeeper server is single threaded. The same thread handles > reads and writes. When reads are slow (possibly because of excessive seeks), > add entry operations suffer in terms of latencies. Providing separate read > and write threads helps in reducing add entry latencies and increasing > throughput even when we're facing slow reads. Having a single read thread > also results in low disk utilization because seeks can't be ordered > efficiently by the OS. Multiple read threads would help in improving the read > throughput. > Discussion on this can be found at > http://mail-archives.apache.org/mod_mbox/zookeeper-bookkeeper-dev/201209.mbox/%3ccaolhydqpzn-v10zynfwud_h0qzrxtmjgttx7a9eofohyyty...@mail.gmail.com%3e > Reviewboard : https://reviews.apache.org/r/7560/ -- This message was sent by Atlassian JIRA (v6.1#6144)