Hi Shannon, We have all kinds of HA going on.
What are your distributed folks doing? Sometimes it is easiest just to use what they use. Appliances work great (one example is F5's GTM and LTM). The sw products often have their own solution (i.e. DB2 HADR, Websphere ND, Oracle RAC) and those are good choices for those products. We do use some LinuxHA (on SLES for z it is included and supported) for clustered file systems. It's complicated, but it can do things like provide r/w file systems to multiple server and move IP addresses around for you. When you think about just activating an app on another server, does it have access to the same files? >From a systems management standpoint, we prefer that our applications run >active-active (that is send traffic to multiple app servers if possible) to >use capacity on more than one CEC. IHS in Websphere ND has plugins too where >you can adjust percentage of traffic to the various app servers. This >allows us to take whole lpars or CECs out of service for planned maintenance >as well without much human intervention. Hope that is helpful. Marcy -----Original Message----- From: Linux on 390 Port [mailto:[email protected]] On Behalf Of Collinson.Shannon Sent: Friday, October 04, 2013 8:03 AM To: [email protected] Subject: [LINUX-390] any good recommendations for an HA tool on zSeries? We're running RHEL6.2 and RHEL6.4 on our zlinux servers under z/VM 6.2 and so far have been handling HA by just clustering servers--yeah, any transaction in process to a server that's gone down would be whacked in mid-air, but anything new would route to the "cluster-buddy" that was still up. That's not true high-availability, though, and won't work for all our potential applications. Of course, we're looking at SSI which will help out for planned outages, but we'd also like to be able to do something in the case of a server-crash (i.e. have some sort of heartbeat-monitor that could pop up/activate an application on a different server if it noticed something was down). We'll be investigating Tivoli Systems Automation for Multiplatform, and the Sine Nomine HAO (High Availability Option), plus I intend to see if the RHEL HA add-on is compatible with zSeries, but I'm wondering if there's any other good products to explore (as well as anyone's experiences with the above products). We did a cursory look at LinuxHA, but unfortunately our management is not keen on using freeware, even though price will definitely be a consideration in whatever we decide on. Any comments from those in the field actually exploiting HA for zSeries at their shops? Thanks! Shannon Collinson, SunTrust Bank, Atlanta, GA LEGAL DISCLAIMER The information transmitted is intended solely for the individual or entity to which it is addressed and may contain confidential and/or privileged material. Any review, retransmission, dissemination or other use of or taking action in reliance upon this information by persons or entities other than the intended recipient is prohibited. If you have received this email in error please contact the sender and delete the material from any computer. By replying to this e-mail, you consent to SunTrust's monitoring activities of all communication that occurs on SunTrust's systems. SunTrust is a federally registered service mark of SunTrust Banks, Inc. [ST:XCL] ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For more information on Linux on System z, visit http://wiki.linuxvm.org/ ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For more information on Linux on System z, visit http://wiki.linuxvm.org/
