Last Updated: 4 April 2023
Experienced z/VM System Programmer Roadmap
The advanced roadmap assumes you have previous IBM mainframe experience. Perhaps you have a background in z/OS and would like to learn more about z/VM. The education in this track skips some of the basic education found in the other roles.
Example of this role may include: z/OS System Programmer, Current z/VM System Administrator
Session 300 - What's Going Wrong? LPAR Weights
This presentation reviews the basic concepts about LPAR weight, the notion of entitlement, how to recognize configuration problems, and how to correct them. Techniques and tools that might help are discussed.
Date added: November 1, 2022
Chapters:
0:00 - Introduction
1:25 - Basic concepts
12:06 - Ways things go wrong
32:53 - Tools
37:21 - Summary
Material:
LPAR Weights presentation
Session 301 - Virtual Switch (VSwitch): Advanced Topics
The Virtual Switch (VSwitch) is a virtualized representation of a hardware LAN switch. A virtual switch is capable of bridging a z/VM guest LAN to an associated real LAN connected by an OSA-Express adapter. This video presents advanced z/VM Virtual Switch topics and includes an extensive discussion on link aggregation and diagnostics.
Date added: December 13, 2022
Chapters:
0:00 - Introduction
0:53 - IEEE 802.3ad and Link Aggregation
12:35 - Shared Link Aggregation Port Groups
15:48 - IVL Domain
17:19 - IVL VSwitch
18:35 - IVL Dynamic Controls
19:31 - Create the Shared Port Group
20:24 - Define a Global VSwitch
21:38 - Asynchronous Global VSwitch Initialization
24:42 - OSA Priority Queuing
27:44 - HiperSocket Virtual Switch Bridge
34:12 - VEPA - Virtual Ethernet Port Aggregator
39:03 - z/VM Virtual Switch SNMP MIB
41:08 - Diagnostics
51:21 - Support Timeline
Material:
z/VM Virtual Switch - Advanced Topics presentation
Session 302 - SSI & LGR Performance Topics
This video explains performance implications using z/VM Single System Image (SSI) and Live Guest Relocation (LGR). Metrics like Quiesce Time (QT) and Relocation Time (RT) are explained and factors that affect performance using SSI and LGR are reviewed in detail.
Date added: April 4, 2022
Chapters:
0:00 - Introduction
1:27 - Background and review
3:25 - Live Guest Relocation - Key Performance Metrics
6:26 - LGR: Factors affecting Quiesce Time and Relocation Time
9:56 - LGR: Serial vs. Concurrent Relocations
10:51 - Effect of Serial vs. Concurrent on Quiesce Time
12:47 - Effect of Serial vs. Concurrent on Relocation Time
14:16 - Effect of IMMEDIATE option on Relocation Time
15:14 - VMRELOCATE Options Summary
15:57 - Background on ISFC Capacity Test
19:27 - Effect of CTC Bandwidth on LGR
21:31 - Effect of Virtual Machine Size on LGR
22:24 - Impact of Virtual Machine Changing Memory on LGR
24:05 - LGR: CPU and Memory Use Habits
25:05 - Effect of System Memory Constraint on LGR
28:23 - Effect of LGR on Existing Workloads
31:44 - LGR: Things to Keep in Mind
33:22 - SSI: ISFC Logical Link Configuration Best Practices
35:07 - SSI: ISFC Logical Link Write Scheduling, under the covers
36:34 - SSI Workload Distribution Measurements
37:30 - SSI Distribution: CPU Constrained Measurement
39:35 - SSI Distribution: Virtual I/O Constrained Measurement
40:27 - SSI Distribution: Memory Constrained Measurement
40:41 - SSI Scaling Measurements
42:31 - SSI Transition Measurement
43:37 - SSI: Performance Toolkit, Considerations
44:52 - SSI: MONWRITE Considerations
45:03 - SSI: Dump and PMR Considerations
45:19 - SSI and LGR: Planning White Space
46:37 - Relocation Planning: Other Considerations
47:54 - Summary
Material:
z/VM SSI & LGR Performance Topics Presentation
z/VM SSI & LGR Performance Reports