By using DB2 extenders in a partitioned database environment, you can exploit features that support especially well the manipulation of LOBs. Large repositories of LOBs (which can be up to 2 gigabytes in length each) can be stored in one database, since a database can be spread across many machines.
Also, DB2 extenders participate in the parallel processing of SQL operations as managed by DB2 Extended Enterprise Edition. When DB2 Extended Enterprise Edition runs a query in parallel, any DB2 Extender UDF in the query is also run in parallel on the individual database partitions.