[
https://issues.apache.org/jira/browse/HUDI-2101?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17385846#comment-17385846
]
ASF GitHub Bot commented on HUDI-2101:
--------------------------------------
xiarixiaoyao opened a new pull request #3330:
URL: https://github.com/apache/hudi/pull/3330
## *Tips*
- *Thank you very much for contributing to Apache Hudi.*
- *Please review https://hudi.apache.org/contributing.html before opening a
pull request.*
## What is the purpose of the pull request
pr for RFC - 28 : Support Z-order curve
Z-order is a technique that allows you to map multidimensional data to a
single dimension. We can use this feature to improve query performance.
query performance test:
we use databricks test case
https://databricks.com/blog/2018/07/31/processing-petabytes-of-data-in-seconds-with-databricks-delta.html?spm=a2c4g.11186623.2.11.2a8f1693QNwUSH&_ga=2.29295480.552083878.1584501563-968665100.1584501563
https://help.aliyun.com/document_detail/168137.html?spm=a2c4g.11186623.6.563.10d758ccclYtVb
prepare data:
10 billion data， 5w files （parquet files）
test env：
spark-3.1.0
hadoop-3.1.0
hudi-0.8.0
test step：
step1： prepare hudi cow table with 10 billion data， 5w files
step2： do optimize with z-order， sort column： src_ip, dst_ip and produce
5w files。 df.optimizeByZOrder(Seq("src_ip", "dst_ip"), options, outputFileNum
= 50000)
step3： do optimize with z-order， sort column：src_ip, src_port, dst_ip,
dst_port and produce 5w files。 df.optimizeByZOrder(Seq("src_ip",
"src_port", "dst_ip", "dst_port"), options, outputFileNum = 50000)
test result
<html xmlns:o="urn:schemas-microsoft-com:office:office"
xmlns:w="urn:schemas-microsoft-com:office:word"
xmlns:m="http://schemas.microsoft.com/office/2004/12/omml";
xmlns="http://www.w3.org/TR/REC-html40";>
<head>
<meta name=ProgId content=Word.Document>
<meta name=Generator content="Microsoft Word 15">
<meta name=Originator content="Microsoft Word 15">
<link rel=File-List
href="file:///C:\Users\m00443775\AppData\Local\Temp\msohtmlclip1\01\clip_filelist.xml">
<!--[if gte mso 9]><xml>
<o:OfficeDocumentSettings>
<o:RelyOnVML/>
<o:AllowPNG/>
</o:OfficeDocumentSettings>
</xml><![endif]-->
<link rel=themeData
href="file:///C:\Users\m00443775\AppData\Local\Temp\msohtmlclip1\01\clip_themedata.thmx">
<link rel=colorSchemeMapping
href="file:///C:\Users\m00443775\AppData\Local\Temp\msohtmlclip1\01\clip_colorschememapping.xml">
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<w:WordDocument>
<w:View>Normal</w:View>
<w:Zoom>0</w:Zoom>
<w:TrackMoves/>
<w:TrackFormatting/>
<w:PunctuationKerning/>
<w:DrawingGridVerticalSpacing>7.8 磅</w:DrawingGridVerticalSpacing>
<w:DisplayHorizontalDrawingGridEvery>0</w:DisplayHorizontalDrawingGridEvery>
<w:DisplayVerticalDrawingGridEvery>2</w:DisplayVerticalDrawingGridEvery>
<w:ValidateAgainstSchemas/>
<w:SaveIfXMLInvalid>false</w:SaveIfXMLInvalid>
<w:IgnoreMixedContent>false</w:IgnoreMixedContent>
<w:AlwaysShowPlaceholderText>false</w:AlwaysShowPlaceholderText>
<w:DoNotPromoteQF/>
<w:LidThemeOther>EN-US</w:LidThemeOther>
<w:LidThemeAsian>ZH-CN</w:LidThemeAsian>
<w:LidThemeComplexScript>X-NONE</w:LidThemeComplexScript>
<w:Compatibility>
<w:SpaceForUL/>
<w:BalanceSingleByteDoubleByteWidth/>
<w:DoNotLeaveBackslashAlone/>
<w:ULTrailSpace/>
<w:DoNotExpandShiftReturn/>
<w:AdjustLineHeightInTable/>
<w:BreakWrappedTables/>
<w:SnapToGridInCell/>
<w:WrapTextWithPunct/>
<w:UseAsianBreakRules/>
<w:DontGrowAutofit/>
<w:SplitPgBreakAndParaMark/>
<w:EnableOpenTypeKerning/>
<w:DontFlipMirrorIndents/>
<w:OverrideTableStyleHps/>
<w:UseFELayout/>
</w:Compatibility>
<m:mathPr>
<m:mathFont m:val="Cambria Math"/>
<m:brkBin m:val="before"/>
<m:brkBinSub m:val="--"/>
<m:smallFrac m:val="off"/>
<m:dispDef/>
<m:lMargin m:val="0"/>
<m:rMargin m:val="0"/>
<m:defJc m:val="centerGroup"/>
<m:wrapIndent m:val="1440"/>
<m:intLim m:val="subSup"/>
<m:naryLim m:val="undOvr"/>
</m:mathPr></w:WordDocument>
</xml><![endif]--><!--[if gte mso 9]><xml>
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DefSemiHidden="false" DefQFormat="false" DefPriority="99"
LatentStyleCount="371">
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<body lang=ZH-CN style='tab-interval:21.0pt;text-justify-trim:punctuation'>
<!--StartFragment-->
Table | Files number | Data size | first query | second query | Query
resource | Data skipping
-- | -- | -- | -- | -- | -- | --
Hudi table | 5w | 10 billion | 76980ms | 29228ms | 330core, 1t memory | Scan
5w files
z-order with two-column sorting | 5w | 10 billion | 4662ms | 3855ms | 16
core 96G memory | Scan 4 files
z-order with four-column sorting | 5w | 10 billion | 6168ms | 3344ms | 16
core 96G memory | Scan 6 files
Hilbert sort | 5w | 10 billion | 5694ms | 4029ms | 16 core 96G memory |
Scan 5 files
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## Brief change log
*(for example:)*
- *Modify AnnotationLocation checkstyle rule in checkstyle.xml*
## Verify this pull request
UT added.
## Committer checklist
- [ ] Has a corresponding JIRA in PR title & commit
- [ ] Commit message is descriptive of the change
- [ ] CI is green
- [ ] Necessary doc changes done or have another open PR
- [ ] For large changes, please consider breaking it into sub-tasks under
an umbrella JIRA.
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> support z-order for hudi
> ------------------------
>
> Key: HUDI-2101
> URL: https://issues.apache.org/jira/browse/HUDI-2101
> Project: Apache Hudi
> Issue Type: Sub-task
> Components: Spark Integration
> Reporter: tao meng
> Assignee: tao meng
> Priority: Major
> Fix For: 0.10.0
>
>
> support z-order for hudi to optimze the query
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