Hello, Kevin. That's an interesting direction for your company to take. Can you elaborate a bit on what drove the decision to not exploit virtualization?
As far as the move from z/VM to bare metal LPARs, I don't see any potential problems, as long as the LPARs are defined with enough physical resources to support the zLinux workloads. Good luck. DJ On 06/30/2015 09:18 PM, Morris, Kevin J. (RET-DAY) wrote: > We currently have 22 zLinux guests (all running RHEL 6.4) on 7 zVM > (v6.2) LPARs spread across 6 CECs (29 IFLs in total) all to support > numerous environments for a single application. Here is our current > zVM LPAR / zLinux guest configuration: 1. Sandbox zVM LPAR - 3 zLinux > systems only for Systems Programming use/testing. 2. Test/Dev zVM > LPAR - 2 zLinux systems for application development and testing. 3. > Prod#1 zVM LPAR - 5 zLinux systems for cert/prod 4. Prod#2 zVM LPAR - > 4 zLinux systems for cert/prod 5. Prod#3 zVM LPAR - 1 zLinux system > for prod 6. Prod#4 zVM LPAR - 1 zLinux system for prod 7. DR zVM LPAR > - 6 zLinux systems for prod DR. > > At one point we had an additional ~12 zLinux systems throughout these > zVM LPARs, but they have since been retired. > > As a sizeable software cost-savings effort (zVM, RACF, Perfkit, > Operations Manager), we are planning to migrate these 22 zLinux > systems into standalone LPARs and eliminate zVM altogether. > > I know that we will lose the capability to overcommit/share memory > between zLinux systems, but the application running in this > environment is very response-time critical/sensitive so we actually > dedicated memory resources to our production zLinux systems anyways. > Additionally, after retiring the ~12 servers, we now have a memory > excess on all of our zVM LPARs. VSWITCH is nice with its automatic > failover, etc; however, we have tested the linux "bonding driver" and > feel it is an adequate replacement. We are not a zVM SSI user. > > Also, let me state that the business has no future plans to > grow/expand the zVM/zLinux environment (including as a virtualization > platform for traditional x86 workloads). > > Given our static environment, can anyone provide any glaringly > obvious caveats/downfalls to migrating from zVM to standalone zLinux > LPARs that we might be missing? > > Thanks! > > Kevin Morris Reed Elsevier - Technology Services zOS Systems > Engineering > > > ---------------------------------------------------------------------- > > 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/ > -- Dave Jones Houston, TX 281.578.7544 ---------------------------------------------------------------------- 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/
