Tag Archives: talend

Parallel Data Processing Comparison – CloverETL vs. Talend vs. Pentaho (Part 3)

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As I have promised I bring you a complex comparison of ETL tools: CloverETL, Talend and Pentaho.

Short summary of my previous posts: For testing I used two transformations based on TPCH test and the input data generated by dbgen utility. The transformations were run on my laptop with Windows Vista Home Premium. For detail information see part 1 and part 2.

New testing:
To ensure my comparison a full complexity, all tools were tested as “desktop” and “enterprise” ETL tools. The “desktop” tools were running on laptop computer with a small amount of data. The “enterprise” ETL tools were running on server class machine with a large amount of data stored both in flat files and in a database. The transformation executed on server class machine was the same as the one I executed on desktop, only the size of input data was changed:

  • lineitem.tbl – 59,986,052 records, 7.24 GB
  • customers.tbl – 1,500,000 records, 233 MB
  • orders.tbl – 15,000,000 records, 1.62 GB

The results of flat file reading:

TPCH-Q1

TPCH-Q1

TPCH-Q3

TPCH-Q3

The new results of database reading, all previously published results, detailed information about used hardware and a summary are available in this final document.

I also described main features of all tools and my experiences to work with them. This part of the document expresses my opinions so it could be biased since I work mostly with CloverETL. If you don’t agree with anything, please express your opinion in comments. I will be pleased to discuss them with you.

Parallel Data Processing Comparison – CloverETL vs. Talend vs. Pentaho (Part 2)

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Before we will release a complete comparison of open source ETL tools and after a success of my previous blog post I decided to publish the second transformation that we used in the comparison.

The second transformation is also based on SQL query that I rewrote to ETL transformation. I chose Query 3 from http://www.tpc.org/tpch.

select
l_orderkey,
sum(l_extendedprice*(1-l_discount)) as revenue,
o_orderdate,
o_shippriority
from customer, orders, lineitem
where c_mktsegment = ‘BUILDING’
and c_custkey = o_custkey
and l_orderkey = o_orderkey
and o_orderdate < date ‘1995-03-15’
and l_shipdate > date ‘1995-03-15’
group by l_orderkey, o_orderdate, o_shippriority
order by revenue desc, o_orderdate

Input data are generated by dbgen utility and stored in CSV files.

  • lineitem.tbl – 6,001,215 records, 724 MB
  • customers.tbl – 15,000 records, 23.2 MB
  • orders.tbl – 1,500,000 records, 163 MB

Expected output should contain 11,620 records.

There is a new item in the results. After a discussion in my previous post I added „Pentaho parallel“, Pentaho transformation that reads data in parallel mode. Thanks Matt for your transformation :-) without it I wasn’t able to set it up.

Matt Caster also presented an opinion that Pentaho is discriminated because the transformation sorts the data before aggregation in Pentaho transformation. Yes, I agree that sorting of 6,000,000 records takes a significant amount of execution time of the transformation. But I have no choice, Pentaho aggregate component requires sorted input. Today’s transformation is more fair in this aspect. The number of records flowing to aggregate component is smaller (30,519 records) so they can be easily sorted in memory and the sorting doesn’t influence the total execution time in such volume.

The versions of used ETL tools stay the same ones: CloverETL Designer 2.8.1, Talend Open Studio 3.1.3 and Pentaho Data Integration 3.2.0.

Also the hardware configuration and Java runtime parameters are the same:

  • Intel Core 2 Duo @ 1666 Mhz, 2048 MB RAM, 200GB SATA 5400 RPM, Windows Vista Home Premium 32bit.
  • -server -Xmx256m -Xmx1536m

Results:

  1. CloverETL ParallelReader
  2. Talend
  3. Pentaho parallel
  4. CloverETL UniversalDataReader
  5. Pentaho

Results

Transformations and the input data are available on filefactory.com. Today’s transformation are named TPCH2. The transformation from my previous post are named TPCH1.

Please give me a feedback, especially on Talend transformation if it’s correct.

Transformation graphs

CloverETL ParallelReader & UniversalDataReader

CloverETL ParallelReader & UniversalDataReader

Talend

Talend

Pentaho

Pentaho

Pentaho parallel

Pentaho parallel

Parallel Data Processing Comparison – CloverETL vs. Talend vs. Pentaho

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On Oct. 21 OpenSys released a new version of its ETL tool, CloverETL Designer version 2.8.1. It’s mainly bugfix version but also brings a new component, ParallelReader, that makes delimited data file (CSV) processing faster than ever before.

I decided to make a test and compare ParallelReader’s performance with CloverETL’s UniversalDataReader and also with two ETL competitors Talend Open Studio (3.1.3) and Pentaho Data Integration (3.2.0).

As a testing task I chose simple SQL query and I tried to rewrite it to ETL transformation.

select
l_returnflag,
l_linestatus,
sum(l_quantity) as sum_qty,
sum(l_extendedprice) as sum_base_price,
sum(l_extendedprice*(1-l_discount)) as sum_disc_price,
sum(l_extendedprice*(1-l_discount)*(1+l_tax)) as sum_charge,
avg(l_quantity) as avg_qty,
avg(l_extendedprice) as avg_price,
avg(l_discount) as avg_disc,
count(*) as count_order
from lineitem
where l_shipdate <= date ‘1998-09-03’
group by l_returnflag, l_linestatus
order byl_returnflag, l_linestatus;

This query is one of standard queries used for performance testing of database engines. More info on http://www.tpc.org/tpch/. The dataset for testing was generated by dbgen utility available on tpc.org too. The size of dataset is 725MB.

All transformation was run on my laptop: Intel Core 2 Duo @ 1666 Mhz, 2048 MB RAM, 200GB SATA 5400 RPM, Windows Vista Home Premium 32bit.

Java parameters was set up to -server -Xmx256m -Xmx1536m.

The results aren’t surprising :-) :

  1. CloverETL – ParallelReader
  2. CloverETL – UniversalDataReader
  3. Talend
  4. Pentaho

Results

If you don’t trust me you can verify results on your own computer. All transformation graphs and testing dataset are available on rapidshare.com or filefactory.com (200 MB). CloverETL Designer can be downloaded on www.cloveretl.com.

Deeper and more extensive comparison will be published soon. Watch www.cloveretl.com, watch this blog. The latest news about CloverETL are also available on CloverETL linkedin group and CloverETL facebook group. Don’t hesitate and join.

Transformation graphs

CloverETL ParallelReader

CloverETL ParallelReader

CloverETL UniversalDataReader

CloverETL UniversalDataReader

Talend

Talend

Pentaho

Pentaho