[ https://issues.apache.org/jira/browse/BOOKKEEPER-429?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13701418#comment-13701418 ]
Hadoop QA commented on BOOKKEEPER-429: -------------------------------------- Testing JIRA BOOKKEEPER-429 Patch [BOOKKEEPER-429.diff|https://issues.apache.org/jira/secure/attachment/12591091/BOOKKEEPER-429.diff] downloaded at Sat Jul 6 21:11:21 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:red}-1 RAT{color} . {color:red}-1{color} the patch seems to introduce 1 new RAT warning(s) {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:green}+1 TESTS{color} . Tests run: 856 {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/409/ > 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: BK-429.patch, 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 is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira