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DekarLab

Blog about big data processing and data-driven investments

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DekarLab

Category: DATA PROCESSING

We will discuss here solutions for data processing and distributed computing, like HDFS, spark, and kubernetes.

Microservices vs service oriented architecture (SOA) and how containers change the rules of the game

19. September 2017 karden DATA PROCESSING

Microservices approach gains recently popularity. Some time ago service oriented architecture (SOA) approach was very popular. But what is the difference?

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Schema evolution and backward and forward compatibility for data in data lakes

10. September 2017 karden DATA PROCESSING

We have discussed before the format for clean and derived data in data lakes. One of the popular formats for this goal is an avro format. We will talk here why it is needed and how to achieve backward and forward compatibility by designing avro schemas.
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HBase is next step in your big data technology stack

10. September 2017 karden DATA PROCESSING

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Post Views: 419

Authentication and authorizaton for XMLA Connect and Mondrian

4. August 2017 karden DATA PROCESSING

If you would like to turn on basic authentication for mondrian cubes from excel you need to implement steps below.
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Post Views: 793

How to implement Kylin dialect for Mondrian

18. June 2017 karden DATA PROCESSING

In this post I will explain, how to implement Kylin dialect in Mondrian.

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Post Views: 918

Improving performance by reading data with Hive for HDFS using subfolders (partitioning)

6. June 2017 karden DATA PROCESSING

In ourĀ  previous article we have discussed the root structure for HDFS. In this article we will discuss next level of the file structure, which will help to improve the speed of reading data.

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Post Views: 483

Raw, clean, and derived data in data lakes based on HDFS

3. June 2017 karden DATA PROCESSING

You may think, that there is no need to structure data in HDFS. You can systemize it in the future. But I think this is a wrong way. We should always keep in mind: there is no free lunch. Therefore it is better to make desicions at the beginning.

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Post Views: 920

Thoughts about schema-on-write and schema-on-read

2. June 2017 karden DATA PROCESSING

There are two approcahes, which we can select for designing storage of the data. They are schema-on-read and schema-on-write.

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Post Views: 509

How to integrate Apache Kylin OLAP In Excel (pivot) [XMLA Connect and Mondrian]

21. May 2017 karden DATA PROCESSING

Apache Kylin is very powerfull OLAP engine. It supports ODBC driver to move the data in excel, however this driver is not user friendly. Users should wright sql queries for this.

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Post Views: 3,291

Short note about HDFS or why you need distributed file system

21. May 2017 karden DATA PROCESSING

Why do you need HDFS (Hadoop Distributed Files System)? If the amount of data is small and place on your computer is enough for this, then you do not need distributed file system. But if you like to process a large amount of data, which is not possible to save on one computer, then you need to think about distributed file system.

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Post Views: 388

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all (50) article (3) auth (3) book (5) code on github (5) data lake (12) design (18) gui xmdm (1) hadoop (6) hbase (1) hive (1) index tracking (4) informatica (1) k8s (5) kafka (1) kylin (3) microservices (6) mondrian (1) money builder (5) OLAP in hadoop (3) pentaho (3) phd thesis (1) spark (4) zeppelin (2)
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