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https://issues.apache.org/jira/browse/HBASE-15557?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16676973#comment-16676973
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Hadoop QA commented on HBASE-15557:
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue} 0m
19s{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} master Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 6m
9s{color} | {color:green} master passed {color} |
| {color:blue}0{color} | {color:blue} refguide {color} | {color:blue} 6m
0s{color} | {color:blue} branch has no errors when building the reference
guide. See footer for rendered docs, which you should manually inspect. {color}
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|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 6m
1s{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:blue}0{color} | {color:blue} refguide {color} | {color:blue} 5m
44s{color} | {color:blue} patch has no errors when building the reference
guide. See footer for rendered docs, which you should manually inspect. {color}
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|| || || || {color:brown} Other Tests {color} ||
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green} 0m
18s{color} | {color:green} The patch does not generate ASF License warnings.
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| {color:black}{color} | {color:black} {color} | {color:black} 24m 52s{color} |
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|| Subsystem || Report/Notes ||
| Docker | Client=17.05.0-ce Server=17.05.0-ce Image:yetus/hbase:b002b0b |
| JIRA Issue | HBASE-15557 |
| JIRA Patch URL |
https://issues.apache.org/jira/secure/attachment/12945650/HBASE-15557.master.001.patch
|
| Optional Tests | dupname asflicense refguide |
| uname | Linux f7729664dd37 4.4.0-138-generic #164-Ubuntu SMP Tue Oct 2
17:16:02 UTC 2018 x86_64 GNU/Linux |
| Build tool | maven |
| Personality |
/home/jenkins/jenkins-slave/workspace/PreCommit-HBASE-Build/component/dev-support/hbase-personality.sh
|
| git revision | master / 86cbbdea9e |
| maven | version: Apache Maven 3.5.4
(1edded0938998edf8bf061f1ceb3cfdeccf443fe; 2018-06-17T18:33:14Z) |
| refguide |
https://builds.apache.org/job/PreCommit-HBASE-Build/14962/artifact/patchprocess/branch-site/book.html
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| refguide |
https://builds.apache.org/job/PreCommit-HBASE-Build/14962/artifact/patchprocess/patch-site/book.html
|
| Max. process+thread count | 93 (vs. ulimit of 10000) |
| modules | C: . U: . |
| Console output |
https://builds.apache.org/job/PreCommit-HBASE-Build/14962/console |
| Powered by | Apache Yetus 0.8.0 http://yetus.apache.org |
This message was automatically generated.
> document SyncTable in ref guide
> -------------------------------
>
> Key: HBASE-15557
> URL: https://issues.apache.org/jira/browse/HBASE-15557
> Project: HBase
> Issue Type: Bug
> Components: documentation
> Affects Versions: 1.2.0
> Reporter: Sean Busbey
> Assignee: Wellington Chevreuil
> Priority: Critical
> Attachments: HBASE-15557.master.001.patch
>
>
> The docs for SyncTable are insufficient. Brief description from [~davelatham]
> HBASE-13639 comment:
> {quote}
> Sorry for the lack of better documentation, Abhishek Soni. Thanks for
> bringing it up. I'll try to provide a better explanation. You may have
> already seen it, but if not, the design doc linked in the description above
> may also give you some better clues as to how it should be used.
> Briefly, the feature is intended to start with a pair of tables in remote
> clusters that are already substantially similar and make them identical by
> comparing hashes of the data and copying only the diffs instead of having to
> copy the entire table. So it is targeted at a very specific use case (with
> some work it could generalize to cover things like CopyTable and
> VerifyRepliaction but it's not there yet). To use it, you choose one table to
> be the "source", and the other table is the "target". After the process is
> complete the target table should end up being identical to the source table.
> In the source table's cluster, run
> org.apache.hadoop.hbase.mapreduce.HashTable and pass it the name of the
> source table and an output directory in HDFS. HashTable will scan the source
> table, break the data up into row key ranges (default of 8kB per range) and
> produce a hash of the data for each range.
> Make the hashes available to the target cluster - I'd recommend using DistCp
> to copy it across.
> In the target table's cluster, run
> org.apache.hadoop.hbase.mapreduce.SyncTable and pass it the directory where
> you put the hashes, and the names of the source and destination tables. You
> will likely also need to specify the source table's ZK quorum via the
> --sourcezkcluster option. SyncTable will then read the hash information, and
> compute the hashes of the same row ranges for the target table. For any row
> range where the hash fails to match, it will open a remote scanner to the
> source table, read the data for that range, and do Puts and Deletes to the
> target table to update it to match the source.
> I hope that clarifies it a bit. Let me know if you need a hand. If anyone
> wants to work on getting some documentation into the book, I can try to write
> some more but would love a hand on turning it into an actual book patch.
> {quote}
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