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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ZOOKEEPER-2932) Performance enhancement about purging task
Date Mon, 06 Nov 2017 21:45:00 GMT

    [ https://issues.apache.org/jira/browse/ZOOKEEPER-2932?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16240964#comment-16240964

ASF GitHub Bot commented on ZOOKEEPER-2932:

Github user afine commented on a diff in the pull request:

    --- Diff: src/java/main/org/apache/zookeeper/server/persistence/FileTxnLog.java ---
    @@ -255,30 +255,19 @@ private void padFile(FileOutputStream out) throws IOException {
         public static File[] getLogFiles(File[] logDirList,long snapshotZxid) {
             List<File> files = Util.sortDataDir(logDirList, "log", true);
    --- End diff --
    couldn't we make the last param false and then we can use a simpler `for (File f : files)`

> Performance enhancement about purging task
> ------------------------------------------
>                 Key: ZOOKEEPER-2932
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-2932
>             Project: ZooKeeper
>          Issue Type: Improvement
>          Components: server
>            Reporter: OuYang Liang
>   Original Estimate: 24h
>  Remaining Estimate: 24h
> The method FileTxnLog.getLogFiles is used to find out the target log files to be retained
base on the given zxid when purging task is running. The current implementation of this method
is trivial to understand, and iterate the log files twice to achieve its purchase. It could
be improved from both performance and readability.

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