[ https://issues.apache.org/jira/browse/HDFS-10702?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15632842#comment-15632842 ]
Hadoop QA commented on HDFS-10702: ---------------------------------- | (x) *{color:red}-1 overall{color}* | \\ \\ || Vote || Subsystem || Runtime || Comment || | {color:blue}0{color} | {color:blue} reexec {color} | {color:blue} 0m 0s{color} | {color:blue} Docker mode activated. {color} | | {color:red}-1{color} | {color:red} patch {color} | {color:red} 0m 11s{color} | {color:red} HDFS-10702 does not apply to trunk. Rebase required? Wrong Branch? See https://wiki.apache.org/hadoop/HowToContribute for help. {color} | \\ \\ || Subsystem || Report/Notes || | JIRA Issue | HDFS-10702 | | JIRA Patch URL | https://issues.apache.org/jira/secure/attachment/12836810/HDFS-10797.006.patch | | Console output | https://builds.apache.org/job/PreCommit-HDFS-Build/17405/console | | Powered by | Apache Yetus 0.4.0-SNAPSHOT http://yetus.apache.org | This message was automatically generated. > Add a Client API and Proxy Provider to enable stale read from Standby > --------------------------------------------------------------------- > > Key: HDFS-10702 > URL: https://issues.apache.org/jira/browse/HDFS-10702 > Project: Hadoop HDFS > Issue Type: Improvement > Reporter: Jiayi Zhou > Assignee: Jiayi Zhou > Priority: Minor > Attachments: HDFS-10702.001.patch, HDFS-10702.002.patch, > HDFS-10702.003.patch, HDFS-10702.004.patch, HDFS-10702.005.patch, > HDFS-10797.006.patch, StaleReadfromStandbyNN.pdf > > > Currently, clients must always talk to the active NameNode when performing > any metadata operation, which means active NameNode could be a bottleneck for > scalability. One way to solve this problem is to send read-only operations to > Standby NameNode. The disadvantage is that it might be a stale read. > Here, I'm thinking of adding a Client API to enable/disable stale read from > Standby which gives Client the power to set the staleness restriction. -- This message was sent by Atlassian JIRA (v6.3.4#6332) --------------------------------------------------------------------- To unsubscribe, e-mail: hdfs-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-issues-h...@hadoop.apache.org