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Hadoop QA commented on HADOOP-11847: ------------------------------------ \\ \\ | (x) *{color:red}-1 overall{color}* | \\ \\ || Vote || Subsystem || Runtime || Comment || | {color:red}-1{color} | patch | 0m 1s | The patch command could not apply the patch during dryrun. | \\ \\ || Subsystem || Report/Notes || | Patch URL | http://issues.apache.org/jira/secure/attachment/12733805/HADOOP-11847-v6.patch | | Optional Tests | javadoc javac unit findbugs checkstyle | | git revision | trunk / de30d66 | | Console output | https://builds.apache.org/job/PreCommit-HADOOP-Build/6738/console | This message was automatically generated. > Enhance raw coder allowing to read least required inputs in decoding > -------------------------------------------------------------------- > > Key: HADOOP-11847 > URL: https://issues.apache.org/jira/browse/HADOOP-11847 > Project: Hadoop Common > Issue Type: Sub-task > Components: io > Reporter: Kai Zheng > Assignee: Kai Zheng > Labels: BB2015-05-TBR > Attachments: HADOOP-11847-HDFS-7285-v3.patch, > HADOOP-11847-HDFS-7285-v4.patch, HADOOP-11847-HDFS-7285-v5.patch, > HADOOP-11847-v1.patch, HADOOP-11847-v2.patch, HADOOP-11847-v6.patch > > > This is to enhance raw erasure coder to allow only reading least required > inputs while decoding. It will also refine and document the relevant APIs for > better understanding and usage. When using least required inputs, it may add > computating overhead but will possiblly outperform overall since less network > traffic and disk IO are involved. > This is something planned to do but just got reminded by [~zhz]' s question > raised in HDFS-7678, also copied here: > bq.Kai Zheng I have a question about decoding: in a (6+3) schema, if block #2 > is missing, and I want to repair it with blocks 0, 1, 3, 4, 5, 8, how should > I construct the inputs to RawErasureDecoder#decode? > With this work, hopefully the answer to above question would be obvious. -- This message was sent by Atlassian JIRA (v6.3.4#6332)