Repository: incubator-griffin-site
Updated Branches:
  refs/heads/asf-site c2c806783 -> 4020d98e5


Site updated: 2017-03-20 13:41:41


Project: http://git-wip-us.apache.org/repos/asf/incubator-griffin-site/repo
Commit: 
http://git-wip-us.apache.org/repos/asf/incubator-griffin-site/commit/4020d98e
Tree: 
http://git-wip-us.apache.org/repos/asf/incubator-griffin-site/tree/4020d98e
Diff: 
http://git-wip-us.apache.org/repos/asf/incubator-griffin-site/diff/4020d98e

Branch: refs/heads/asf-site
Commit: 4020d98e5fd95ecd3460376a4280f473b3410b0c
Parents: c2c8067
Author: guoyp <[email protected]>
Authored: Mon Mar 20 13:41:41 2017 -0700
Committer: guoyp <[email protected]>
Committed: Mon Mar 20 13:41:41 2017 -0700

----------------------------------------------------------------------
 2017/03/20/hello-world/index.html | 111 +++++++++++++++++------------
 archives/2017/03/index.html       |  51 ++++---------
 archives/2017/index.html          |  51 ++++---------
 archives/index.html               |  51 ++++---------
 images/Business_Process.png       | Bin 0 -> 33482 bytes
 index.html                        | 126 ++++++++++++++++-----------------
 6 files changed, 170 insertions(+), 220 deletions(-)
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http://git-wip-us.apache.org/repos/asf/incubator-griffin-site/blob/4020d98e/2017/03/20/hello-world/index.html
----------------------------------------------------------------------
diff --git a/2017/03/20/hello-world/index.html 
b/2017/03/20/hello-world/index.html
index 67c8e10..a5b10b6 100644
--- a/2017/03/20/hello-world/index.html
+++ b/2017/03/20/hello-world/index.html
@@ -3,23 +3,20 @@
 <head>
   <meta charset="utf-8">
   
-  <title>Hello World | Hexo</title>
+  <title>Apache Griffin | Apache Griffin</title>
   <meta name="viewport" content="width=device-width, initial-scale=1, 
maximum-scale=1">
-  <meta name="description" content="Welcome to Hexo! This is your very first 
post. Check documentation for more info. If you get any problems when using 
Hexo, you can find the answer in troubleshooting or you can ask me on GitHub.
-Quick">
+  <meta name="description" content="AbstractApache Griffin is a Data Quality 
Service platform built on Apache Hadoop and Apache Spark. It provides a 
framework process for defining data quality model, executing data quality 
measurement,">
 <meta property="og:type" content="article">
-<meta property="og:title" content="Hello World">
+<meta property="og:title" content="Apache Griffin">
 <meta property="og:url" 
content="http://yoursite.com/2017/03/20/hello-world/index.html";>
-<meta property="og:site_name" content="Hexo">
-<meta property="og:description" content="Welcome to Hexo! This is your very 
first post. Check documentation for more info. If you get any problems when 
using Hexo, you can find the answer in troubleshooting or you can ask me on 
GitHub.
-Quick">
-<meta property="og:updated_time" content="2017-03-20T18:03:41.000Z">
+<meta property="og:site_name" content="Apache Griffin">
+<meta property="og:description" content="AbstractApache Griffin is a Data 
Quality Service platform built on Apache Hadoop and Apache Spark. It provides a 
framework process for defining data quality model, executing data quality 
measurement,">
+<meta property="og:updated_time" content="2017-03-20T20:35:53.000Z">
 <meta name="twitter:card" content="summary">
-<meta name="twitter:title" content="Hello World">
-<meta name="twitter:description" content="Welcome to Hexo! This is your very 
first post. Check documentation for more info. If you get any problems when 
using Hexo, you can find the answer in troubleshooting or you can ask me on 
GitHub.
-Quick">
+<meta name="twitter:title" content="Apache Griffin">
+<meta name="twitter:description" content="AbstractApache Griffin is a Data 
Quality Service platform built on Apache Hadoop and Apache Spark. It provides a 
framework process for defining data quality model, executing data quality 
measurement,">
   
-    <link rel="alternate" href="/atom.xml" title="Hexo" 
type="application/atom+xml">
+    <link rel="alternate" href="/atom.xml" title="Apache Griffin" 
type="application/atom+xml">
   
   
     <link rel="icon" href="/favicon.png">
@@ -40,7 +37,7 @@ Quick">
   <div id="header-outer" class="outer">
     <div id="header-title" class="inner">
       <h1 id="logo-wrap">
-        <a href="/" id="logo">Hexo</a>
+        <a href="/" id="logo">Apache Griffin</a>
       </h1>
       
     </div>
@@ -55,9 +52,9 @@ Quick">
       </nav>
       <nav id="sub-nav">
         
-          <a id="nav-rss-link" class="nav-icon" href="/atom.xml" title="RSS 
Feed"></a>
+          <a id="nav-rss-link" class="nav-icon" href="/atom.xml" title="Flux 
RSS"></a>
         
-        <a id="nav-search-btn" class="nav-icon" title="Search"></a>
+        <a id="nav-search-btn" class="nav-icon" title="Rechercher"></a>
       </nav>
       <div id="search-form-wrap">
         <form action="//google.com/search" method="get" accept-charset="UTF-8" 
class="search-form"><input type="search" name="q" results="0" 
class="search-form-input" placeholder="Search"><button type="submit" 
class="search-form-submit">&#xF002;</button><input type="hidden" 
name="sitesearch" value="http://yoursite.com";></form>
@@ -69,7 +66,7 @@ Quick">
         <section id="main"><article id="post-hello-world" class="article 
article-type-post" itemscope itemprop="blogPost">
   <div class="article-meta">
     <a href="/2017/03/20/hello-world/" class="article-date">
-  <time datetime="2017-03-20T18:03:41.000Z" 
itemprop="datePublished">2017-03-20</time>
+  <time datetime="2017-03-20T20:09:44.000Z" 
itemprop="datePublished">2017-03-20</time>
 </a>
     
   </div>
@@ -80,7 +77,7 @@ Quick">
         
   
     <h1 class="article-title" itemprop="name">
-      Hello World
+      Apache Griffin
     </h1>
   
 
@@ -88,36 +85,64 @@ Quick">
     
     <div class="article-entry" itemprop="articleBody">
       
-        <p>Welcome to <a href="https://hexo.io/"; target="_blank" 
rel="external">Hexo</a>! This is your very first post. Check <a 
href="https://hexo.io/docs/"; target="_blank" rel="external">documentation</a> 
for more info. If you get any problems when using Hexo, you can find the answer 
in <a href="https://hexo.io/docs/troubleshooting.html"; target="_blank" 
rel="external">troubleshooting</a> or you can ask me on <a 
href="https://github.com/hexojs/hexo/issues"; target="_blank" 
rel="external">GitHub</a>.</p>
-<h2 id="Quick-Start"><a href="#Quick-Start" class="headerlink" title="Quick 
Start"></a>Quick Start</h2><h3 id="Create-a-new-post"><a 
href="#Create-a-new-post" class="headerlink" title="Create a new 
post"></a>Create a new post</h3><figure class="highlight bash"><table><tr><td 
class="gutter"><pre><div class="line">1</div></pre></td><td 
class="code"><pre><div class="line">$ hexo new <span class="string">"My New 
Post"</span></div></pre></td></tr></table></figure>
-<p>More info: <a href="https://hexo.io/docs/writing.html"; target="_blank" 
rel="external">Writing</a></p>
-<h3 id="Run-server"><a href="#Run-server" class="headerlink" title="Run 
server"></a>Run server</h3><figure class="highlight bash"><table><tr><td 
class="gutter"><pre><div class="line">1</div></pre></td><td 
class="code"><pre><div class="line">$ hexo 
server</div></pre></td></tr></table></figure>
-<p>More info: <a href="https://hexo.io/docs/server.html"; target="_blank" 
rel="external">Server</a></p>
-<h3 id="Generate-static-files"><a href="#Generate-static-files" 
class="headerlink" title="Generate static files"></a>Generate static 
files</h3><figure class="highlight bash"><table><tr><td 
class="gutter"><pre><div class="line">1</div></pre></td><td 
class="code"><pre><div class="line">$ hexo 
generate</div></pre></td></tr></table></figure>
-<p>More info: <a href="https://hexo.io/docs/generating.html"; target="_blank" 
rel="external">Generating</a></p>
-<h3 id="Deploy-to-remote-sites"><a href="#Deploy-to-remote-sites" 
class="headerlink" title="Deploy to remote sites"></a>Deploy to remote 
sites</h3><figure class="highlight bash"><table><tr><td 
class="gutter"><pre><div class="line">1</div></pre></td><td 
class="code"><pre><div class="line">$ hexo 
deploy</div></pre></td></tr></table></figure>
-<p>More info: <a href="https://hexo.io/docs/deployment.html"; target="_blank" 
rel="external">Deployment</a></p>
+        <h2 id="Abstract"><a href="#Abstract" class="headerlink" 
title="Abstract"></a>Abstract</h2><p>Apache Griffin is a Data Quality Service 
platform built on Apache Hadoop and Apache Spark. It provides a framework 
process for defining data quality model, executing data quality measurement, 
automating data profiling and validation, as well as a unified data quality 
visualization across multiple data systems.  It tries to address the data 
quality challenges in big data and streaming context.</p>
+<h2 id="Overview-of-Apache-Griffin"><a href="#Overview-of-Apache-Griffin" 
class="headerlink" title="Overview of Apache Griffin"></a>Overview of Apache 
Griffin</h2><p>At eBay, when people use big data (Hadoop or other streaming 
systems), measurement of data quality is a big challenge. Different teams have 
built customized tools to detect and analyze data quality issues within their 
own domains. As a platform organization, we think of taking a platform approach 
to commonly occurring patterns. As such, we are building a platform to provide 
shared Infrastructure and generic features to solve common data quality pain 
points. This would enable us to build trusted data assets.</p>
+<p>Currently it is very difficult and costly to do data quality validation 
when we have large volumes of related data flowing across multi-platforms 
(streaming and batch). Take eBay’s Real-time Personalization Platform as a 
sample; Everyday we have to validate the data quality for ~600M records. Data 
quality often becomes one big challenge in this complex environment and massive 
scale.</p>
+<p>We detect the following at eBay:</p>
+<ol>
+<li>Lack of an end-to-end, unified view of data quality from multiple data 
sources to target applications that takes into account the lineage of the data. 
This results in a long time to identify and fix data quality issues.</li>
+<li>Lack of a system to measure data quality in streaming mode through 
self-service. The need is for a system where datasets can be registered, data 
quality models can be defined, data quality can be visualized and monitored 
using a simple tool and teams alerted when an issue is detected.</li>
+<li>Lack of a Shared platform and API Service. Every team should not have to 
apply and manage own hardware and software infrastructure to solve this common 
problem.</li>
+</ol>
+<p>With these in mind, we decided to build Apache Griffin - A data quality 
service that aims to solve the above short-comings.</p>
+<p>Apache Griffin includes:</p>
+<p><strong>Data Quality Model Engine</strong>: Apache Griffin is model driven 
solution, user can choose various data quality dimension to execute his/her 
data quality validation based on selected target data-set or source data-set ( 
as the golden reference data). It has corresponding library supporting it in 
back-end for the following measurement:</p>
+<ul>
+<li>Accuracy - Does data reflect the real-world objects or a verifiable 
source</li>
+<li>Completeness - Is all necessary data present</li>
+<li>Validity -  Are all data values within the data domains specified by the 
business</li>
+<li>Timeliness - Is the data available at the time needed</li>
+<li>Anomaly detection -  Pre-built algorithm functions for the identification 
of items, events or observations which do not conform to an expected pattern or 
other items in a dataset</li>
+<li>Data Profiling - Apply statistical analysis and assessment of data values 
within a dataset for consistency, uniqueness and logic.</li>
+</ul>
+<p><strong>Data Collection Layer</strong>:</p>
+<p>We support two kinds of data sources, batch data and real time data.</p>
+<p>For batch mode, we can collect data source from  our Hadoop platform by 
various data connectors.</p>
+<p>For real time mode, we can connect with messaging system like Kafka to near 
real time analysis.</p>
+<p><strong>Data Process and Storage Layer</strong>:</p>
+<p>For batch analysis, our data quality model will compute data quality 
metrics in our spark cluster based on data source in hadoop.</p>
+<p>For near real time analysis, we consume data from messaging system, then 
our data quality model will compute our real time data quality metrics in our 
spark cluster. for data storage, we use time series database in our back end to 
fulfill front end request.</p>
+<p><strong>Apache Griffin Service</strong>:</p>
+<p>We have RESTful web services to accomplish all the functionalities of 
Apache Griffin, such as register data-set, create data quality model, publish 
metrics, retrieve metrics, add subscription, etc. So, the developers can 
develop their own user interface based on these web serivces.</p>
+<h2 id="Main-business-process"><a href="#Main-business-process" 
class="headerlink" title="Main business process"></a>Main business 
process</h2><p>Here’s the business process diagram</p>
+
+<h2 id="Rationale"><a href="#Rationale" class="headerlink" 
title="Rationale"></a>Rationale</h2><p>The challenge we face at eBay is that 
our data volume is becoming bigger and bigger, systems process become more 
complex, while we do not have a unified data quality solution to ensure the 
trusted data sets which provide confidences on data quality to our data 
consumers.  The key challenges on data quality includes:</p>
+<ol>
+<li>Existing commercial data quality solution cannot address data quality 
lineage among systems, cannot scale out to support fast growing data at 
eBay</li>
+<li>Existing eBay’s domain specific tools take a long time to identify and 
fix poor data quality when data flowed through multiple systems</li>
+<li>Business logic becomes complex, requires data quality system much 
flexible.</li>
+<li>Some data quality issues do have business impact on user experiences, 
revenue, efficiency &amp; compliance.</li>
+<li>Communication overhead of data quality metrics, typically in a big 
organization, which involve different teams.</li>
+</ol>
+<p>The idea of  Apache Apache Griffin is to provide Data Quality validation as 
a Service, to allow data engineers and data consumers to have:</p>
+<ul>
+<li>Near real-time understanding of the data quality health of your data 
pipelines with end-to-end monitoring, all in one place.</li>
+<li>Profiling, detecting and correlating issues and providing recommendations 
that drive rapid and focused troubleshooting</li>
+<li>A centralized data quality model management system including rule, 
metadata, scheduler etc.  </li>
+<li>Native code generation to run everywhere, including Hadoop, Kafka, Spark, 
etc.</li>
+<li>One set of tools to build data quality pipelines across all eBay data 
platforms.</li>
+</ul>
 
       
     </div>
     <footer class="article-footer">
-      <a data-url="http://yoursite.com/2017/03/20/hello-world/"; 
data-id="cj0ifcekd00006npoe4xmair5" class="article-share-link">Share</a>
+      <a data-url="http://yoursite.com/2017/03/20/hello-world/"; 
data-id="cj0ikfzhw0000pgpouj7009vf" class="article-share-link">Partager</a>
       
       
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-      <strong class="article-nav-caption">Older</strong>
-      <div class="article-nav-title">hello</div>
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@@ -145,16 +170,12 @@ Quick">
   
     
   <div class="widget-wrap">
-    <h3 class="widget-title">Recent Posts</h3>
+    <h3 class="widget-title">Articles récents</h3>
     <div class="widget">
       <ul>
         
           <li>
-            <a href="/2017/03/20/hello-world/">Hello World</a>
-          </li>
-        
-          <li>
-            <a href="/2017/03/20/hello/">hello</a>
+            <a href="/2017/03/20/hello-world/">Apache Griffin</a>
           </li>
         
       </ul>
@@ -169,8 +190,8 @@ Quick">
   
   <div class="outer">
     <div id="footer-info" class="inner">
-      &copy; 2017 John Doe<br>
-      Powered by <a href="http://hexo.io/"; target="_blank">Hexo</a>
+      &copy; 2017 William Guo<br>
+      Propulsé by <a href="http://hexo.io/"; target="_blank">Hexo</a>
     </div>
   </div>
 </footer>

http://git-wip-us.apache.org/repos/asf/incubator-griffin-site/blob/4020d98e/archives/2017/03/index.html
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diff --git a/archives/2017/03/index.html b/archives/2017/03/index.html
index 065106a..a59829c 100644
--- a/archives/2017/03/index.html
+++ b/archives/2017/03/index.html
@@ -3,16 +3,16 @@
 <head>
   <meta charset="utf-8">
   
-  <title>Archives: 2017/3 | Hexo</title>
+  <title>Archives: 2017/3 | Apache Griffin</title>
   <meta name="viewport" content="width=device-width, initial-scale=1, 
maximum-scale=1">
   <meta property="og:type" content="website">
-<meta property="og:title" content="Hexo">
+<meta property="og:title" content="Apache Griffin">
 <meta property="og:url" 
content="http://yoursite.com/archives/2017/03/index.html";>
-<meta property="og:site_name" content="Hexo">
+<meta property="og:site_name" content="Apache Griffin">
 <meta name="twitter:card" content="summary">
-<meta name="twitter:title" content="Hexo">
+<meta name="twitter:title" content="Apache Griffin">
   
-    <link rel="alternate" href="/atom.xml" title="Hexo" 
type="application/atom+xml">
+    <link rel="alternate" href="/atom.xml" title="Apache Griffin" 
type="application/atom+xml">
   
   
     <link rel="icon" href="/favicon.png">
@@ -33,7 +33,7 @@
   <div id="header-outer" class="outer">
     <div id="header-title" class="inner">
       <h1 id="logo-wrap">
-        <a href="/" id="logo">Hexo</a>
+        <a href="/" id="logo">Apache Griffin</a>
       </h1>
       
     </div>
@@ -48,9 +48,9 @@
       </nav>
       <nav id="sub-nav">
         
-          <a id="nav-rss-link" class="nav-icon" href="/atom.xml" title="RSS 
Feed"></a>
+          <a id="nav-rss-link" class="nav-icon" href="/atom.xml" title="Flux 
RSS"></a>
         
-        <a id="nav-search-btn" class="nav-icon" title="Search"></a>
+        <a id="nav-search-btn" class="nav-icon" title="Rechercher"></a>
       </nav>
       <div id="search-form-wrap">
         <form action="//google.com/search" method="get" accept-charset="UTF-8" 
class="search-form"><input type="search" name="q" results="0" 
class="search-form-input" placeholder="Search"><button type="submit" 
class="search-form-submit">&#xF002;</button><input type="hidden" 
name="sitesearch" value="http://yoursite.com";></form>
@@ -76,31 +76,12 @@
   <div class="archive-article-inner">
     <header class="archive-article-header">
       <a href="/2017/03/20/hello-world/" class="archive-article-date">
-  <time datetime="2017-03-20T18:03:41.000Z" itemprop="datePublished">Mar 
20</time>
+  <time datetime="2017-03-20T20:09:44.000Z" itemprop="datePublished">Mar 
20</time>
 </a>
       
   
     <h1 itemprop="name">
-      <a class="archive-article-title" href="/2017/03/20/hello-world/">Hello 
World</a>
-    </h1>
-  
-
-    </header>
-  </div>
-</article>
-  
-    
-    
-    <article class="archive-article archive-type-post">
-  <div class="archive-article-inner">
-    <header class="archive-article-header">
-      <a href="/2017/03/20/hello/" class="archive-article-date">
-  <time datetime="2017-03-20T17:20:14.000Z" itemprop="datePublished">Mar 
20</time>
-</a>
-      
-  
-    <h1 itemprop="name">
-      <a class="archive-article-title" href="/2017/03/20/hello/">hello</a>
+      <a class="archive-article-title" href="/2017/03/20/hello-world/">Apache 
Griffin</a>
     </h1>
   
 
@@ -136,16 +117,12 @@
   
     
   <div class="widget-wrap">
-    <h3 class="widget-title">Recent Posts</h3>
+    <h3 class="widget-title">Articles récents</h3>
     <div class="widget">
       <ul>
         
           <li>
-            <a href="/2017/03/20/hello-world/">Hello World</a>
-          </li>
-        
-          <li>
-            <a href="/2017/03/20/hello/">hello</a>
+            <a href="/2017/03/20/hello-world/">Apache Griffin</a>
           </li>
         
       </ul>
@@ -160,8 +137,8 @@
   
   <div class="outer">
     <div id="footer-info" class="inner">
-      &copy; 2017 John Doe<br>
-      Powered by <a href="http://hexo.io/"; target="_blank">Hexo</a>
+      &copy; 2017 William Guo<br>
+      Propulsé by <a href="http://hexo.io/"; target="_blank">Hexo</a>
     </div>
   </div>
 </footer>

http://git-wip-us.apache.org/repos/asf/incubator-griffin-site/blob/4020d98e/archives/2017/index.html
----------------------------------------------------------------------
diff --git a/archives/2017/index.html b/archives/2017/index.html
index ccfa026..913430a 100644
--- a/archives/2017/index.html
+++ b/archives/2017/index.html
@@ -3,16 +3,16 @@
 <head>
   <meta charset="utf-8">
   
-  <title>Archives: 2017 | Hexo</title>
+  <title>Archives: 2017 | Apache Griffin</title>
   <meta name="viewport" content="width=device-width, initial-scale=1, 
maximum-scale=1">
   <meta property="og:type" content="website">
-<meta property="og:title" content="Hexo">
+<meta property="og:title" content="Apache Griffin">
 <meta property="og:url" content="http://yoursite.com/archives/2017/index.html";>
-<meta property="og:site_name" content="Hexo">
+<meta property="og:site_name" content="Apache Griffin">
 <meta name="twitter:card" content="summary">
-<meta name="twitter:title" content="Hexo">
+<meta name="twitter:title" content="Apache Griffin">
   
-    <link rel="alternate" href="/atom.xml" title="Hexo" 
type="application/atom+xml">
+    <link rel="alternate" href="/atom.xml" title="Apache Griffin" 
type="application/atom+xml">
   
   
     <link rel="icon" href="/favicon.png">
@@ -33,7 +33,7 @@
   <div id="header-outer" class="outer">
     <div id="header-title" class="inner">
       <h1 id="logo-wrap">
-        <a href="/" id="logo">Hexo</a>
+        <a href="/" id="logo">Apache Griffin</a>
       </h1>
       
     </div>
@@ -48,9 +48,9 @@
       </nav>
       <nav id="sub-nav">
         
-          <a id="nav-rss-link" class="nav-icon" href="/atom.xml" title="RSS 
Feed"></a>
+          <a id="nav-rss-link" class="nav-icon" href="/atom.xml" title="Flux 
RSS"></a>
         
-        <a id="nav-search-btn" class="nav-icon" title="Search"></a>
+        <a id="nav-search-btn" class="nav-icon" title="Rechercher"></a>
       </nav>
       <div id="search-form-wrap">
         <form action="//google.com/search" method="get" accept-charset="UTF-8" 
class="search-form"><input type="search" name="q" results="0" 
class="search-form-input" placeholder="Search"><button type="submit" 
class="search-form-submit">&#xF002;</button><input type="hidden" 
name="sitesearch" value="http://yoursite.com";></form>
@@ -76,31 +76,12 @@
   <div class="archive-article-inner">
     <header class="archive-article-header">
       <a href="/2017/03/20/hello-world/" class="archive-article-date">
-  <time datetime="2017-03-20T18:03:41.000Z" itemprop="datePublished">Mar 
20</time>
+  <time datetime="2017-03-20T20:09:44.000Z" itemprop="datePublished">Mar 
20</time>
 </a>
       
   
     <h1 itemprop="name">
-      <a class="archive-article-title" href="/2017/03/20/hello-world/">Hello 
World</a>
-    </h1>
-  
-
-    </header>
-  </div>
-</article>
-  
-    
-    
-    <article class="archive-article archive-type-post">
-  <div class="archive-article-inner">
-    <header class="archive-article-header">
-      <a href="/2017/03/20/hello/" class="archive-article-date">
-  <time datetime="2017-03-20T17:20:14.000Z" itemprop="datePublished">Mar 
20</time>
-</a>
-      
-  
-    <h1 itemprop="name">
-      <a class="archive-article-title" href="/2017/03/20/hello/">hello</a>
+      <a class="archive-article-title" href="/2017/03/20/hello-world/">Apache 
Griffin</a>
     </h1>
   
 
@@ -136,16 +117,12 @@
   
     
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-    <h3 class="widget-title">Recent Posts</h3>
+    <h3 class="widget-title">Articles récents</h3>
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+            <a href="/2017/03/20/hello-world/">Apache Griffin</a>
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     <div id="footer-info" class="inner">
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-      Powered by <a href="http://hexo.io/"; target="_blank">Hexo</a>
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http://git-wip-us.apache.org/repos/asf/incubator-griffin-site/blob/4020d98e/archives/index.html
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diff --git a/archives/index.html b/archives/index.html
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+++ b/archives/index.html
@@ -3,16 +3,16 @@
 <head>
   <meta charset="utf-8">
   
-  <title>Archives | Hexo</title>
+  <title>Archives | Apache Griffin</title>
   <meta name="viewport" content="width=device-width, initial-scale=1, 
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   <meta property="og:type" content="website">
-<meta property="og:title" content="Hexo">
+<meta property="og:title" content="Apache Griffin">
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+<meta property="og:site_name" content="Apache Griffin">
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+<meta name="twitter:title" content="Apache Griffin">
   
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type="application/atom+xml">
+    <link rel="alternate" href="/atom.xml" title="Apache Griffin" 
type="application/atom+xml">
   
   
     <link rel="icon" href="/favicon.png">
@@ -33,7 +33,7 @@
   <div id="header-outer" class="outer">
     <div id="header-title" class="inner">
       <h1 id="logo-wrap">
-        <a href="/" id="logo">Hexo</a>
+        <a href="/" id="logo">Apache Griffin</a>
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@@ -48,9 +48,9 @@
       </nav>
       <nav id="sub-nav">
         
-          <a id="nav-rss-link" class="nav-icon" href="/atom.xml" title="RSS 
Feed"></a>
+          <a id="nav-rss-link" class="nav-icon" href="/atom.xml" title="Flux 
RSS"></a>
         
-        <a id="nav-search-btn" class="nav-icon" title="Search"></a>
+        <a id="nav-search-btn" class="nav-icon" title="Rechercher"></a>
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     <header class="archive-article-header">
       <a href="/2017/03/20/hello-world/" class="archive-article-date">
-  <time datetime="2017-03-20T18:03:41.000Z" itemprop="datePublished">Mar 
20</time>
+  <time datetime="2017-03-20T20:09:44.000Z" itemprop="datePublished">Mar 
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 </a>
       
   
     <h1 itemprop="name">
-      <a class="archive-article-title" href="/2017/03/20/hello-world/">Hello 
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-    </h1>
-  
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-  </div>
-</article>
-  
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-  <div class="archive-article-inner">
-    <header class="archive-article-header">
-      <a href="/2017/03/20/hello/" class="archive-article-date">
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-</a>
-      
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-    <h1 itemprop="name">
-      <a class="archive-article-title" href="/2017/03/20/hello/">hello</a>
+      <a class="archive-article-title" href="/2017/03/20/hello-world/">Apache 
Griffin</a>
     </h1>
   
 
@@ -136,16 +117,12 @@
   
     
   <div class="widget-wrap">
-    <h3 class="widget-title">Recent Posts</h3>
+    <h3 class="widget-title">Articles récents</h3>
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+            <a href="/2017/03/20/hello-world/">Apache Griffin</a>
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-      Powered by <a href="http://hexo.io/"; target="_blank">Hexo</a>
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+      Propulsé by <a href="http://hexo.io/"; target="_blank">Hexo</a>
     </div>
   </div>
 </footer>

http://git-wip-us.apache.org/repos/asf/incubator-griffin-site/blob/4020d98e/images/Business_Process.png
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index bd22bd2..7e7ebaa 100644
--- a/index.html
+++ b/index.html
@@ -3,16 +3,16 @@
 <head>
   <meta charset="utf-8">
   
-  <title>Hexo</title>
+  <title>Apache Griffin</title>
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maximum-scale=1">
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 <meta property="og:url" content="http://yoursite.com/index.html";>
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type="application/atom+xml">
+    <link rel="alternate" href="/atom.xml" title="Apache Griffin" 
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     <link rel="icon" href="/favicon.png">
@@ -33,7 +33,7 @@
   <div id="header-outer" class="outer">
     <div id="header-title" class="inner">
       <h1 id="logo-wrap">
-        <a href="/" id="logo">Hexo</a>
+        <a href="/" id="logo">Apache Griffin</a>
       </h1>
       
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@@ -48,9 +48,9 @@
       </nav>
       <nav id="sub-nav">
         
-          <a id="nav-rss-link" class="nav-icon" href="/atom.xml" title="RSS 
Feed"></a>
+          <a id="nav-rss-link" class="nav-icon" href="/atom.xml" title="Flux 
RSS"></a>
         
-        <a id="nav-search-btn" class="nav-icon" title="Search"></a>
+        <a id="nav-search-btn" class="nav-icon" title="Rechercher"></a>
       </nav>
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         <form action="//google.com/search" method="get" accept-charset="UTF-8" 
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itemprop="blogPost">
   <div class="article-meta">
     <a href="/2017/03/20/hello-world/" class="article-date">
-  <time datetime="2017-03-20T18:03:41.000Z" 
itemprop="datePublished">2017-03-20</time>
+  <time datetime="2017-03-20T20:09:44.000Z" 
itemprop="datePublished">2017-03-20</time>
 </a>
     
   </div>
@@ -75,7 +75,7 @@
         
   
     <h1 itemprop="name">
-      <a class="article-title" href="/2017/03/20/hello-world/">Hello World</a>
+      <a class="article-title" href="/2017/03/20/hello-world/">Apache 
Griffin</a>
     </h1>
   
 
@@ -83,56 +83,58 @@
     
     <div class="article-entry" itemprop="articleBody">
       
-        <p>Welcome to <a href="https://hexo.io/"; target="_blank" 
rel="external">Hexo</a>! This is your very first post. Check <a 
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rel="external">troubleshooting</a> or you can ask me on <a 
href="https://github.com/hexojs/hexo/issues"; target="_blank" 
rel="external">GitHub</a>.</p>
-<h2 id="Quick-Start"><a href="#Quick-Start" class="headerlink" title="Quick 
Start"></a>Quick Start</h2><h3 id="Create-a-new-post"><a 
href="#Create-a-new-post" class="headerlink" title="Create a new 
post"></a>Create a new post</h3><figure class="highlight bash"><table><tr><td 
class="gutter"><pre><div class="line">1</div></pre></td><td 
class="code"><pre><div class="line">$ hexo new <span class="string">"My New 
Post"</span></div></pre></td></tr></table></figure>
-<p>More info: <a href="https://hexo.io/docs/writing.html"; target="_blank" 
rel="external">Writing</a></p>
-<h3 id="Run-server"><a href="#Run-server" class="headerlink" title="Run 
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class="gutter"><pre><div class="line">1</div></pre></td><td 
class="code"><pre><div class="line">$ hexo 
server</div></pre></td></tr></table></figure>
-<p>More info: <a href="https://hexo.io/docs/server.html"; target="_blank" 
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-<h3 id="Generate-static-files"><a href="#Generate-static-files" 
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files</h3><figure class="highlight bash"><table><tr><td 
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class="code"><pre><div class="line">$ hexo 
generate</div></pre></td></tr></table></figure>
-<p>More info: <a href="https://hexo.io/docs/generating.html"; target="_blank" 
rel="external">Generating</a></p>
-<h3 id="Deploy-to-remote-sites"><a href="#Deploy-to-remote-sites" 
class="headerlink" title="Deploy to remote sites"></a>Deploy to remote 
sites</h3><figure class="highlight bash"><table><tr><td 
class="gutter"><pre><div class="line">1</div></pre></td><td 
class="code"><pre><div class="line">$ hexo 
deploy</div></pre></td></tr></table></figure>
-<p>More info: <a href="https://hexo.io/docs/deployment.html"; target="_blank" 
rel="external">Deployment</a></p>
+        <h2 id="Abstract"><a href="#Abstract" class="headerlink" 
title="Abstract"></a>Abstract</h2><p>Apache Griffin is a Data Quality Service 
platform built on Apache Hadoop and Apache Spark. It provides a framework 
process for defining data quality model, executing data quality measurement, 
automating data profiling and validation, as well as a unified data quality 
visualization across multiple data systems.  It tries to address the data 
quality challenges in big data and streaming context.</p>
+<h2 id="Overview-of-Apache-Griffin"><a href="#Overview-of-Apache-Griffin" 
class="headerlink" title="Overview of Apache Griffin"></a>Overview of Apache 
Griffin</h2><p>At eBay, when people use big data (Hadoop or other streaming 
systems), measurement of data quality is a big challenge. Different teams have 
built customized tools to detect and analyze data quality issues within their 
own domains. As a platform organization, we think of taking a platform approach 
to commonly occurring patterns. As such, we are building a platform to provide 
shared Infrastructure and generic features to solve common data quality pain 
points. This would enable us to build trusted data assets.</p>
+<p>Currently it is very difficult and costly to do data quality validation 
when we have large volumes of related data flowing across multi-platforms 
(streaming and batch). Take eBay’s Real-time Personalization Platform as a 
sample; Everyday we have to validate the data quality for ~600M records. Data 
quality often becomes one big challenge in this complex environment and massive 
scale.</p>
+<p>We detect the following at eBay:</p>
+<ol>
+<li>Lack of an end-to-end, unified view of data quality from multiple data 
sources to target applications that takes into account the lineage of the data. 
This results in a long time to identify and fix data quality issues.</li>
+<li>Lack of a system to measure data quality in streaming mode through 
self-service. The need is for a system where datasets can be registered, data 
quality models can be defined, data quality can be visualized and monitored 
using a simple tool and teams alerted when an issue is detected.</li>
+<li>Lack of a Shared platform and API Service. Every team should not have to 
apply and manage own hardware and software infrastructure to solve this common 
problem.</li>
+</ol>
+<p>With these in mind, we decided to build Apache Griffin - A data quality 
service that aims to solve the above short-comings.</p>
+<p>Apache Griffin includes:</p>
+<p><strong>Data Quality Model Engine</strong>: Apache Griffin is model driven 
solution, user can choose various data quality dimension to execute his/her 
data quality validation based on selected target data-set or source data-set ( 
as the golden reference data). It has corresponding library supporting it in 
back-end for the following measurement:</p>
+<ul>
+<li>Accuracy - Does data reflect the real-world objects or a verifiable 
source</li>
+<li>Completeness - Is all necessary data present</li>
+<li>Validity -  Are all data values within the data domains specified by the 
business</li>
+<li>Timeliness - Is the data available at the time needed</li>
+<li>Anomaly detection -  Pre-built algorithm functions for the identification 
of items, events or observations which do not conform to an expected pattern or 
other items in a dataset</li>
+<li>Data Profiling - Apply statistical analysis and assessment of data values 
within a dataset for consistency, uniqueness and logic.</li>
+</ul>
+<p><strong>Data Collection Layer</strong>:</p>
+<p>We support two kinds of data sources, batch data and real time data.</p>
+<p>For batch mode, we can collect data source from  our Hadoop platform by 
various data connectors.</p>
+<p>For real time mode, we can connect with messaging system like Kafka to near 
real time analysis.</p>
+<p><strong>Data Process and Storage Layer</strong>:</p>
+<p>For batch analysis, our data quality model will compute data quality 
metrics in our spark cluster based on data source in hadoop.</p>
+<p>For near real time analysis, we consume data from messaging system, then 
our data quality model will compute our real time data quality metrics in our 
spark cluster. for data storage, we use time series database in our back end to 
fulfill front end request.</p>
+<p><strong>Apache Griffin Service</strong>:</p>
+<p>We have RESTful web services to accomplish all the functionalities of 
Apache Griffin, such as register data-set, create data quality model, publish 
metrics, retrieve metrics, add subscription, etc. So, the developers can 
develop their own user interface based on these web serivces.</p>
+<h2 id="Main-business-process"><a href="#Main-business-process" 
class="headerlink" title="Main business process"></a>Main business 
process</h2><p>Here’s the business process diagram</p>
+
+<h2 id="Rationale"><a href="#Rationale" class="headerlink" 
title="Rationale"></a>Rationale</h2><p>The challenge we face at eBay is that 
our data volume is becoming bigger and bigger, systems process become more 
complex, while we do not have a unified data quality solution to ensure the 
trusted data sets which provide confidences on data quality to our data 
consumers.  The key challenges on data quality includes:</p>
+<ol>
+<li>Existing commercial data quality solution cannot address data quality 
lineage among systems, cannot scale out to support fast growing data at 
eBay</li>
+<li>Existing eBay’s domain specific tools take a long time to identify and 
fix poor data quality when data flowed through multiple systems</li>
+<li>Business logic becomes complex, requires data quality system much 
flexible.</li>
+<li>Some data quality issues do have business impact on user experiences, 
revenue, efficiency &amp; compliance.</li>
+<li>Communication overhead of data quality metrics, typically in a big 
organization, which involve different teams.</li>
+</ol>
+<p>The idea of  Apache Apache Griffin is to provide Data Quality validation as 
a Service, to allow data engineers and data consumers to have:</p>
+<ul>
+<li>Near real-time understanding of the data quality health of your data 
pipelines with end-to-end monitoring, all in one place.</li>
+<li>Profiling, detecting and correlating issues and providing recommendations 
that drive rapid and focused troubleshooting</li>
+<li>A centralized data quality model management system including rule, 
metadata, scheduler etc.  </li>
+<li>Native code generation to run everywhere, including Hadoop, Kafka, Spark, 
etc.</li>
+<li>One set of tools to build data quality pipelines across all eBay data 
platforms.</li>
+</ul>
 
       
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