-Dcom.ibm.net.rdma.zeroCopy (Linux® only)

Specifies whether the zero copy function is enabled for Java™ Sockets over RDMA (JSOR). Enable this function to reduce data transfer time for large payloads.

Note: Start of changes for service refresh 8 fix pack 30The RDMA implementation, which was previously deprecated is removed from IBM® SDK, Java Technology Edition, Version 8.End of changes for service refresh 8 fix pack 30
-Dcom.ibm.net.rdma.zeroCopy=[true|false]

When you enable the zero copy function, data is copied directly from Java application memory on one host to Java application memory on another host without using the processor on either host. Intermediate buffer copy operations are avoided, which reduces data transfer time for large data transfers. The default value is false. Use this property with the -Dcom.ibm.net.rdma.zeroCopyThreshold (Linux only) property, which specifies a minimum size for the data transfer. These properties are ignored if RDMA is not enabled.

For more information about the zero copy function, see JSOR zero copy function (Linux only).