DB2 Universal Database (DB2 UDB) supports UTF-8 and UTF-16/UCS-2. When a Unicode database is created, CHAR, VARCHAR, LONG VARCHAR data are stored in UTF-8 form. It's enough for JCR multi-lingual support.

Example of UTF-8 database creation:

DB2 CREATE DATABASE dbname USING CODESET UTF-8 TERRITORY US

Create database with UTF-8 encoding and use db2 dialect for Workspace Container on DB2 v.9 and higher:

<workspace name="collaboration">

          <container class="org.exoplatform.services.jcr.impl.storage.jdbc.JDBCWorkspaceDataContainer">

            <properties>

              <property name="source-name" value="jdbcjcr" />

              <property name="dialect" value="db2" />

              <property name="multi-db" value="false" />

              <property name="max-buffer-size" value="200k" />

              <property name="swap-directory" value="target/temp/swap/ws" />

            </properties>

          .....