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genericqa commented on HDFS-13788: ---------------------------------- | (/) *{color:green}+1 overall{color}* | \\ \\ || Vote || Subsystem || Runtime || Comment || | {color:blue}0{color} | {color:blue} reexec {color} | {color:blue} 0m 17s{color} | {color:blue} Docker mode activated. {color} | || || || || {color:brown} Prechecks {color} || | {color:green}+1{color} | {color:green} @author {color} | {color:green} 0m 0s{color} | {color:green} The patch does not contain any @author tags. {color} | || || || || {color:brown} trunk Compile Tests {color} || | {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 28m 20s{color} | {color:green} trunk passed {color} | | {color:green}+1{color} | {color:green} mvnsite {color} | {color:green} 1m 4s{color} | {color:green} trunk passed {color} | | {color:green}+1{color} | {color:green} shadedclient {color} | {color:green} 40m 36s{color} | {color:green} branch has no errors when building and testing our client artifacts. {color} | || || || || {color:brown} Patch Compile Tests {color} || | {color:green}+1{color} | {color:green} mvnsite {color} | {color:green} 1m 3s{color} | {color:green} the patch passed {color} | | {color:green}+1{color} | {color:green} whitespace {color} | {color:green} 0m 0s{color} | {color:green} The patch has no whitespace issues. {color} | | {color:green}+1{color} | {color:green} shadedclient {color} | {color:green} 12m 4s{color} | {color:green} patch has no errors when building and testing our client artifacts. {color} | || || || || {color:brown} Other Tests {color} || | {color:green}+1{color} | {color:green} asflicense {color} | {color:green} 0m 29s{color} | {color:green} The patch does not generate ASF License warnings. {color} | | {color:black}{color} | {color:black} {color} | {color:black} 54m 58s{color} | {color:black} {color} | \\ \\ || Subsystem || Report/Notes || | Docker | Client=17.05.0-ce Server=17.05.0-ce Image:yetus/hadoop:ba1ab08 | | JIRA Issue | HDFS-13788 | | JIRA Patch URL | https://issues.apache.org/jira/secure/attachment/12935341/HDFS-13788.001.patch | | Optional Tests | asflicense mvnsite | | uname | Linux 467c3038cda3 3.13.0-153-generic #203-Ubuntu SMP Thu Jun 14 08:52:28 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux | | Build tool | maven | | Personality | /testptch/patchprocess/precommit/personality/provided.sh | | git revision | trunk / 475bff6 | | maven | version: Apache Maven 3.3.9 | | Max. process+thread count | 334 (vs. ulimit of 10000) | | modules | C: hadoop-hdfs-project/hadoop-hdfs U: hadoop-hdfs-project/hadoop-hdfs | | Console output | https://builds.apache.org/job/PreCommit-HDFS-Build/24759/console | | Powered by | Apache Yetus 0.8.0-SNAPSHOT http://yetus.apache.org | This message was automatically generated. > Update EC documentation about rack fault tolerance > -------------------------------------------------- > > Key: HDFS-13788 > URL: https://issues.apache.org/jira/browse/HDFS-13788 > Project: Hadoop HDFS > Issue Type: Task > Components: documentation, erasure-coding > Affects Versions: 3.0.0 > Reporter: Xiao Chen > Assignee: Kitti Nanasi > Priority: Major > Attachments: HDFS-13788.001.patch > > > From > http://hadoop.apache.org/docs/r3.0.0/hadoop-project-dist/hadoop-hdfs/HDFSErasureCoding.html: > {quote} > For rack fault-tolerance, it is also important to have at least as many racks > as the configured EC stripe width. For EC policy RS (6,3), this means > minimally 9 racks, and ideally 10 or 11 to handle planned and unplanned > outages. For clusters with fewer racks than the stripe width, HDFS cannot > maintain rack fault-tolerance, but will still attempt to spread a striped > file across multiple nodes to preserve node-level fault-tolerance. > {quote} > Theoretical minimum is 3 racks, and ideally 9 or more, so the document should > be updated. > (I didn't check timestamps, but this is probably due to > {{BlockPlacementPolicyRackFaultTolerant}} isn't completely done when > HDFS-9088 introduced this doc. Later there's also examples in > {{TestErasureCodingMultipleRacks}} to test this explicitly.) -- This message was sent by Atlassian JIRA (v7.6.3#76005) --------------------------------------------------------------------- To unsubscribe, e-mail: hdfs-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-issues-h...@hadoop.apache.org