> Tim is correct about the alias component of UCX. The newer 'TCPIP Services > for VMS' version 5.3 that I'm running on our site does have a better > alternative - there is software included, namely TCPIP LOAD BROKER - that > seems to do quite a decent job of emulating load balancing using the same > parameters as LAT (so says the manual). I have it updating the alias every > 90 seconds.
This was available in earlier versions of UCX. It was rewritten and improved for Dec TCPIP services 5.x. For UCX 4.x , as I recall, the system required that the primary Bind server was a VMS system running UCX. Hence if using this with UCX 4.x you quite often had to setup your own DNS sub-domain for the VMS systems so as to be able to setup a VMS based primary. David Webb VMS and Unix team leader CCSS Middlesex University > David Taubner > CIS Systems Administrator > Health Sciences Centre > Winnipeg, Manitoba > Canada > -----Original Message----- > From: Tim Oakley [mailto:[EMAIL PROTECTED]] > Sent: Tuesday, September 10, 2002 11:23 AM > To: [EMAIL PROTECTED] > Subject: How to add an IP alias with UCX much the way you would > The UCX command 'set interface/clus' allows multiple VMS cluster nodes > to share a 'cluster' ip adress, however it does not work the same as a > DECnet alias where a semblance of load balancing is involved. Instead a > cluster alias results in one of the named servers dealing with all IP > traffic directed to the alias adress. The machine which 'holds' the > adress is called the 'impersonator' in UCX speak. If the current > 'impersonator' is shutdown or crashes then one of the other configured > nodes takes over as impersonator automatically without intervention from > support folks. > Very fault tolerant but unfortunately no concept of load sharing. > ��������������������������������������������� > Tim OAKLEY > MAURY-Imprimeur, > Z.I, Route d'Etampes > 45330 MALESHERBES Cedex > France > voice: (33) 02.38.32.34.38 > fax: (33) 02.38.32.37.72 > email: [EMAIL PROTECTED]
