YCSB/hbase098

HBase (0.98.x) Driver for YCSB

This driver is a binding for the YCSB facilities to operate against a HBase 0.98.x Server cluster. To run against an HBase >= 1.0 cluster, use the hbase10 binding.

Quickstart

1. Start a HBase Server

You need to start a single node or a cluster to point the client at. Please see Apache HBase Reference Guide for more details and instructions.

2. Set up YCSB

You need to clone the repository and compile everything.

git clone git://github.com/brianfrankcooper/YCSB.git
cd YCSB
mvn clean package

3. Create a HBase table for testing

For best results, use the pre-splitting strategy recommended in HBASE-4163:

hbase(main):001:0> n_splits = 200 # HBase recommends (10 * number of regionservers)
hbase(main):002:0> create 'usertable', 'family', {SPLITS => (1..n_splits).map {|i| "user#{1000+i*(9999-1000)/n_splits}"}}

Failing to do so will cause all writes to initially target a single region server.

4. Run the Workload

Before you can actually run the workload, you need to "load" the data first.

You should specify a HBase config directory(or any other directory containing your hbase-site.xml) and a table name and a column family(-cp is used to set java classpath and -p is used to set various properties).

bin/ycsb load hbase -P workloads/workloada -cp /HBASE-HOME-DIR/conf -p table=usertable -p columnfamily=family

Then, you can run the workload:

bin/ycsb run hbase -P workloads/workloada -cp /HBASE-HOME-DIR/conf -p table=usertable -p columnfamily=family

Please see the general instructions in the doc folder if you are not sure how it all works. You can apply additional properties (as seen in the next section) like this:

bin/ycsb run hbase -P workloads/workloada -cp /HBASE-HOME-DIR/conf -p table=usertable -p columnfamily=family -p clientbuffering=true

Configuration Options

Following options can be configurable using -p.

• columnfamily: The HBase column family to target.
• debug : If true, debugging logs are activated. The default is false.
• hbase.usepagefilter : If true, HBase PageFilters are used to limit the number of records consumed in a scan operation. The default is true.
• principal: If testing need to be done against a secure HBase cluster using Kerberos Keytab, this property can be used to pass the principal in the keytab file.
• keytab: The Kerberos keytab file name and location can be passed through this property.
• writebuffersize: The maximum amount, in bytes, of data to buffer on the client side before a flush is forced. The default is 12MB.

Additional HBase settings should be provided in the hbase-site.xml file located in your /HBASE-HOME-DIR/conf directory. Typically this will be /etc/hbase/conf.