- ABOUT G&R
Host Links and Gweb R6.1 production release is available
The production release of Host Links 6.1.0 is now available for download and installation at sites needing the new functionality.
This release introduces Secure Sockets Layer (SSL) support in Ggate, the Gweb web server, Gproxy and the Glink for Java server. SSL is a security protocol that provides privacy over the Internet. The protocol allows client/server applications to communicate in a way that cannot be eavesdropped. Servers are always authenticated and clients are optionally authenticated. Workstations with Glink Professional Edition can now have a private, encrypted connection to their Bull mainframe thru Ggate Professional Edition. Workstations with web-browsers can now have a private, encrypted connection thru the Gweb web server to Bull and IBM mainframes.
Ggate has been improved to setup new connections even faster than before and can now handle more connections per second. Bull has validated that Ggate can handle the maximum load of their new GCOS Network Server Processor (GNSP) which is 15,000 concurrent sessions and 1,000 TPS on the high-end model with 4 processors and 4 GByte of memory.
Ggate now supports the TNVIP protocol, allowing third party emulators and communications products to use Ggate as their high-performance gateway to Bull mainframes. TNVIP is less efficient and less configurable than the G&R/Ggate protocol but Ggate's TNVIP support facilitates a smooth transition from third-party products to state-of-the art G&R Glink and other G&R communications products using the G&R/Ggate protocol.
The Windows version of Gweb has been re-designed to run the terminal emulation sessions as independent threads inside a single terminal emulation process. Previous versions of Gweb were limited by Microsoft Windows' limited capability to manage a high number of processes. With this release we have verified that Windows can handle thousands of concurrent mainframe connections thru a single system with extremely good throughput.
Gproxy is extended to support SSL and can now load balance SSL enabled clients. Gproxy is further enhanced to load balance Glink for Java servers making sure that Glink for Java users always connect to the operational server with least load. Gproxy becomes even more important for users with multiple Ggate, Gweb and Glink for Java servers, both because it balances the load across the currently available servers, and because it allows currently available servers to share the licenses allocated to any server that is down. In this improved version the licenses allocated to a server that is not available are evenly distributed between the operational servers.
The Windows version of Gspool has an improved checking of print server availability when idle and when receiving a new connection from a Bull mainframe. If the print server is inoperable, the connection is broken, triggering recovery on the mainframe.
If the print server becomes unavailable during transfer of print data to Gspool, Gspool will keep the print reports to allow the system administrator to print them when the print server or printer becomes available again.
A new version of the Marben OSIAM Transport stack is offered and required with this release. NOTE that the new stack cannot be used with Host Links versions prior to 6.0.3. This version of the stack is far more reliable in heavy load situations, particularly when handling simultaneous incoming sessions.
This release introduces support for AIX 5L for Power version 5.1.
The equivalent release of Gmail is also available for compatibility. Gmail customers running version 5.3.x or earlier, who want this release because of new functionality in Host Links products should also update Gmail, although there are no functional changes, just error corrections.
See the SRB for a complete list of improvements and corrections offered with this release.