Try OpenEdge Now
skip to main content
User Guide
OpenEdge Replication and after-imaging : Determining OpenEdge Replication network bandwidth

Determining OpenEdge Replication network bandwidth

There is additional replication overhead that is required to transfer the after-image blocks over the network to the target system. This additional overhead is estimated at ten percent over the amount of the message volume sent between the server and agent and consists of header and control information for replication.
Items in this calculation include, but are not limited to:
*Packaging of blocks. Replication adds overhead to each AI block.
*The database default after-image block size of 8K. Changing the after-image block size to 16K means fewer messages are sent, which lowers the network activity by approximately five percent.
*Standard communication between the OpenEdge Replication agent and the OpenEdge Replication server.
Determining network bandwidth can be difficult. Consider that a T1 line provides approximately 1.544 megabits per second of throughput. This value represents the theoretical limit; however, the value is typically somewhat less than this due to routers, hubs, and switches.
* Estimating network bandwidth
* Anticipating additional network overhead