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<html>
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<title>YCSB - Yahoo! Cloud Serving Benchmark</title>
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<H1><img src="images/ycsb.jpg" width=150> Yahoo! Cloud Serving Benchmark</H1>
<H3>Version 0.1.2</H3>
<hr>
<A HREF="index.html">Home</A> - <A href="coreworkloads.html">Core workloads</A> - <a href="tipsfaq.html">Tips and FAQ</A>
<HR>
<UL>
<LI><A href="#overview">Overview</A>
<LI><A href="#download">Download YCSB</A>
<LI><A href="#gettingstarted">Getting started</A>
<LI><A href="#extending">Extending YCSB</A>
</UL>
<HR>
<A name="overview">
<H2>Overview</H2>
There are many new serving databases available, including:
<ul>
<LI>BigTable
<ul>
<LI><A HREF="http://hadoop.apache.org/hbase/">HBase</A>, <A HREF="http://hypertable.org/">Hypertable
</ul>
<LI><A HREF="http://www.microsoft.com/windowsazure/">Azure</A>
<LI><A HREF="http://incubator.apache.org/cassandra/">Cassandra</A>
<LI><A HREF="http://couchdb.apache.org/">CouchDB</A>
<LI><A HREF="http://project-voldemort.com/">Voldemort</A>
<LI><A HREF=http://wiki.github.com/cliffmoon/dynomite/dynomite-framework">Dynomite</A>
<li>...and many others
</ul>
It is difficult to decide which system is right for your application, partially because the features differ between
systems, and partially because there is not an easy way to compare the performance of one system versus another.
<P>
The goal of the YCSB project is to develop a framework and common set of workloads for evaluating the performance of
different "key-value" and "cloud" serving stores. The project comprises two things:
<ul>
<LI>The YCSB Client, an extensible workload generator
<LI>The Core workloads, a set of workload scenarios to be executed by the generator
</UL>
Although the core workloads provide a well rounded picture of a system's performance, the Client is extensible so that
you can define new and different workloads to examine system aspects, or application scenarios, not adequately covered by
the core workload. Similarly, the Client is extensible to support benchmarking different databases. Although we include
sample code for benchmarking HBase and Cassandra, it is straightforward to write a new interface layer to benchmark
your favorite database.
<P>
A common use of the tool is to benchmark multiple systems and compare them. For example, you can install multiple systems
on the same hardward configuration, and run the same workloads against each system. Then you can plot the performance
of each system (for example, as latency versus throughput curves) to see when one system does better than another.
<HR>
<A name="download">
<H2>Download YCSB</H2>
YCSB is available
at <A HREF="http://wiki.github.com/brianfrankcooper/YCSB/">http://wiki.github.com/brianfrankcooper/YCSB/</A>.
<HR>
<a name="gettingstarted">
<H2>Getting started</H2>
Detailed instructions for using YCSB are available on the GitHub wiki:
<A HREF="http://wiki.github.com/brianfrankcooper/YCSB/getting-started">http://wiki.github.com/brianfrankcooper/YCSB/getting-started</A>.
<HR>
<A name="extending">
<H1>Extending YCSB</H1>
YCSB is designed to be extensible. It is easy to add a new database interface layer to support benchmarking a new database. It is also easy to define new workloads.
<ul>
<li><A HREF="dblayer.html">DB Interface Layer</a>
<li><A HREF="workload.html">Implementing new workloads</a>
</UL>
More details about the entire class structure of YCSB is available here:
<UL>
<LI><A HREF="javadoc/index.html">YCSB javadoc documentation</A>
</ul>
<HR>
YCSB - Yahoo! Research - Contact cooperb@yahoo-inc.com.
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