Currently Trafodion uses the standard client side Hbase configuration file
hbase-site.xml deployed by the distros. It is found that there are variations
in this configuration file between distros. At times, the distro manager
decides that a given property is not a client property and it is not added to
the deployed hbase client configuration file. In addition, there are certain
properties like hbase.coprocessor.region.classes need to be configured for
Trafodion tables for the transaction management. Hence, I am planning to
introduce a configuration file traf-site.xml specific to Trafodion similar to
hbase configuration file hbase-site.xml. This configuration file extends the
properties inherited from the standard hbase-site.xml.
By default, the traf-site.xml comes with the following properties
<?xml version="1.0"?>
<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>
<!-- Put Trafodion site-specific property overrides in this file. -->
<configuration>
<property>
<name>hbase.hregion.impl</name>
<value>org.apache.hadoop.hbase.regionserver.transactional.TransactionalRegion</value>
</property>
<property>
<name>hbase.coprocessor.region.classes</name>
<value>
org.apache.hadoop.hbase.coprocessor.transactional.TrxRegionObserver,
org.apache.hadoop.hbase.coprocessor.transactional.TrxRegionEndpoint,
org.apache.hadoop.hbase.coprocessor.AggregateImplementation
</value>
</property>
<property>
<name>hbase.client.scanner.timeout.period</name>
<value>3600000</value>
</property>
</configuration>
This property file will be installed if it doesn't exist at $MY_SQROOT/etc
directory when sqgen is done. Any client side property can be added to this
file and the client connections from Trafodion client processes will inherit
them.
The hbase.coprocessor.region.classes are added as Table co-processor to the
table descriptor when a Trafodion table is created. Trafodion installer will
not be adding to these properties to hbase configuration file soon.
Please feel free to provide your valuable suggestions/comments.
Thanks
Selva
