acro-benchmark Preliminary Results

IBM undertook several macro-benchmarks to demonstrate the benefits of Shared Memory Communications- Remote Direct Memory Access (SMC-R) using key z/OS* middleware, such as CICS*, IMS*, DB2* and IBM WebSphere*. While not complete when this issue went to press, a subset of these benchmark results included:

TradeLite Workload

Scenario: A sample trading application hosted in WebSphere Application Server (WAS) V8.0 using the Liberty Profile environment on one z/OS LPAR, accessed data from a z/OS DB2 database in a separate z/OS LPAR using JDBC drivers. The client, which isn’t a z/OS platform, drove HTTP/REST requests into the WAS via standard TCP/IP. WAS communications with DB2 using JDBC were tested with both standard TCP/IP and SMC-R to demonstrate its performance benefits for multitier applications.
Results: The response time for each client HTTP request was reduced up to 40 percent.

CICS-to-CICS IP Interconnectivity (IPIC)

Scenario: A distributed program link was used to invoke programs in remote CICS regions in another z/OS system via CICS IPIC comparing SMC-R versus standard TCP/IP.
Results: Response time dropped up to 48 percent, resulting in up to 10 percent CPU savings for CICS transactions.

FTP Transfers Between z/OS Systems

Scenario: Bidirectional (i.e., GET and PUT) binary transfers of 1.2 GB files were performed using SMC-R versus TCP/IP.
Results: An overall CPU savings of up to 50 percent over TCP/IP.

—P.D., G.K. and J.S.

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