[ 
https://issues.apache.org/jira/browse/BOOKKEEPER-564?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13626364#comment-13626364
 ] 

Hadoop QA commented on BOOKKEEPER-564:
--------------------------------------

Testing JIRA BOOKKEEPER-564


Patch 
[BOOKKEEPER-564.patch|https://issues.apache.org/jira/secure/attachment/12577738/BOOKKEEPER-564.patch]
 downloaded at Tue Apr  9 07:21:39 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 6 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: 833
.    Tests failed: 0
.    Tests errors: 1

.    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/320/
                
> Better checkpoint mechanism
> ---------------------------
>
>                 Key: BOOKKEEPER-564
>                 URL: https://issues.apache.org/jira/browse/BOOKKEEPER-564
>             Project: Bookkeeper
>          Issue Type: Improvement
>          Components: bookkeeper-server
>            Reporter: Sijie Guo
>            Assignee: Sijie Guo
>             Fix For: 4.3.0
>
>         Attachments: 0002-BOOKKEEPER-564-Better-checkpoint-mechanism.patch, 
> BOOKKEEPER-564.patch, BOOKKEEPER-564.patch
>
>
> Currently, SyncThread made a checkpoint too frequently, which affects 
> performance. data is writing to entry logger file might be blocked by syncing 
> same entry logger file, which affect bookie to achieve higher throughput. We 
> could schedule checkpoint only when rotating an entry log file. so new 
> incoming entries would be written to newer entry log file and old entry log 
> file could be synced.

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