Sean-Gu commented on a change in pull request #982: Realtime doc for lambda mode
URL: https://github.com/apache/kylin/pull/982#discussion_r357535609
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File path: website/_docs30/tutorial/lambda_mode_and_timezone_realtime_olap.md
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@@ -0,0 +1,174 @@
+---
+layout: docs30
+title: Lambda mode and Timezone in Real-time OLAP
+categories: tutorial
+permalink: /docs30/tutorial/lambda_mode_and_timezone_realtime_olap.html
+---
+
+Kylin v3.0.0 will release the real-time OLAP function, by the power of new
added streaming reciever cluster, Kylin can query streaming data with
sub-second latency. You can check [this tech
blog](/blog/2019/04/12/rt-streaming-design/) for the overall design and core
concept.
+
+If you want to find a step by step tutorial, please check this [this tech
blog](/docs30/tutorial/realtime_olap.html).
+In this article, we will introduce how to update segment and set timezone in
for derived time column in realtime OLAP cube.
+
+# Background
+
+Says we have Kafka message which look like this:
+
+{% highlight Groff markup %}
+{
+ "s_nation":"SAUDI ARABIA",
+ "lo_supplycost":74292,
+ "p_category":"MFGR#0910",
+ "local_day_hour_minute":"09_21_44",
+ "event_time":"2019-12-09 08:44:50.000-0500",
+ "local_day_hour":"09_21",
+ "lo_quantity":12,
+ "lo_revenue":1411548,
+ "p_brand":"MFGR#0910051",
+ "s_region":"MIDDLE EAST",
+ "lo_discount":5,
+ "customer_info":{
+ "CITY":"CHINA 057",
+ "REGION":"ASIA",
+ "street":"CHINA 05721",
+ "NATION":"CHINA"
+ },
+ "d_year":1994,
+ "d_weeknuminyear":30,
+ "p_mfgr":"MFGR#09",
+ "v_revenue":7429200,
+ "d_yearmonth":"Jul1994",
+ "s_city":"SAUDI ARA15",
+ "profit_ratio":0.05263157894736842,
+ "d_yearmonthnum":199407,
+ "round":1
+}
+{% endhighlight %}
+
+In this sample, it is come from SSB with some additional field such as
*event_time*. We have the field *event_time* as the timestamp of current event.
Review comment:
it is come -> it comes, field -> fields,
such as *event_time*. we have the field *event_time* as -> such as
*event_time*, which stands for
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