Yahoo cloud service benchmark (YCSB) with extended client to Phoenix

create Phoenix Client: YCSB_PhoenixClient / hbase / src / main / java / com / yahoo / ycsb / db /phoenixClient /**

• This class extends the Yahoo! Cloud Servicing Benchmark (YCSB),
• to benchmark the performance of HBase database wrapped by a Phoenix interface.
• It create the table schema and perform workload against the database.
• 
  This class translates simple requests (read(), scan(), insert(), update(), delete())
• from the client threads into calls against the database.
• This class extends com.yahoo.ycsb.DB and implements the database interface used by YCSB client.
• 
  This class parse the schema information from a schema.xml document and create the table schema in the database accordingly.
• This class parse the workload information from a workload.xml document and build the prepare statement accordingly
• 
  This interface expects a schema ...
• All attributes are of type VARCHAR.
• @author Meizhen Shi

*/

modified:

CoreWorkload: YCSB_PhoenixClient / core / src / main / java / com / yahoo / ycsb / workloads / CoreWorkload.java Modified to take schema and workload from external XML files, build prepared statement and workload accordingly and execute workload over HBase on server

use schema and workload XMLs in Phoenix_Test:

phoenixTest/src/