Tag: HA

VMware VCP 6.7-DCV – Objective 1.6 – Describe and differentiate among vSphere, HA, DRS, and SDRS functionality

by Samuel Mitchell, posted in VMware

The following notes will assist you to prepare for this objective:

  • HA has come a long way, don’t rely on legacy knowledge of HA to meet objective
  • Learn the newer features, pre-reqs and limitations of:
    • Proactive HA
    • Orchestrated Restart
    • Fault Tolerance (FT) vSMP
  • HA can’t work around everything
    • For example datastore connectivity loss or unable to satisfy reservation
  • Ensure you can explain the basic modes of DRS
    • Disable, Manual, Partial, Full Automated, per-VM
  • DRS has come a long way
    • Predictive DRS
    • Limitations of vMotion have been overcome
  • What are the vMotion pre-reqs?
    • CPU compatibility
    • Network configuration
    • Compatible virtual hardware
  • What virtual hardware options can and cannot be migrated with DRS?
  • SDRS often gets overlooked
    • Remember it has 2 dimensions to optimization
      • Space utilization & I/O latency
      • What are you being asked in the question?

Reference: 

vSphere Availability Guide pdf

vSphere Resource Guide pdf

Brian Graf Blog – https://www.brianjgraf.com/2016/10/17/vsphere-6-5-vsphere-ha-whats-new-part-3-orchestrated-restart/

VMware VCP 6.7-DCV – Objective 1.2 – Identify vCenter high availability (HA) requirements

by Samuel Mitchell, posted in VMware

The following notes will assist you to prepare for this objective:

  • Be very clear that this is vCenter availability management NOT host
  • Learn the topology of a vCenter HA deployment
    • Nodes
    • Roles of nodes
    • What can and can’t they do? Particularly witness
  • Set up vCenter HA in your lab, so much more interesting study than just reading
    • Easy to enable/disable
  • Make sure you read the vCenter HA section of the vSphere Availability Guide

Reference: vSphere 6.7 Availability Guide pdf – Chapter 4 – vCenter High Availability

VCP65-DCV – Objective 7.5 – Troubleshoot HA and DRS Configurations and Fault Tolerance

by Samuel Mitchell, posted in VMware

The following reference material from the vSphere 6.5 online documentation will assist you in covering the main information that is needed to know the topics in this objective:

  1. How vSphere HA works
  2. Troubleshooting vSphere HA host states
  3. Troubleshooting Availability
  4. Configure Proactive HA
  5. DRS troubleshooting information
  6. Migration with vMotion
  7. Migration with Storage vMotion
  8. Troubleshooting Storage DRS
  9. Providing Fault Tolerant for Virtual Machines
  10. Troubleshooting Fault Tolerant Virtual Machines
  11. DRS Cluster Validity
  12. Overview Performance Charts for Clusters

VCP65-DCV – Objective 9.1 – Configure vSphere HA Cluster Features

by Samuel Mitchell, posted in VMware

The following reference material from the vSphere 6.5 online documentation will assist you in covering the main information that is needed to know the topics in this objective:

  1. vSphere 6.5 What’s new HA (yellow-bricks.com)
  2. Create and Using vSphere HA Clusters
  3. Best Practices for Networking
  4. vSphere HA Advanced Options
  5. What’s new in vSphere 6.5 Host Resource Management and Operations (VMware Blogs)
  6. vSphere HA Admission Control
  7. Cluster Resources Percentage Admission Control
  8. Slot Policy Admission Control
  9. vCenter HA datastore heartbeats (theithollow.com)
  10. vSphere HA VM Monitoring back to basics (VMware Blogs)
  11. VM Component Protection (VMCP) [VMware Blogs)
  12. Using vSphere HA with Virtual SAN
  13. Using vSphere HA and DRS together

 

 

VCP65-DCV – Objective 9.2 – Configure vCenter Server Appliance (VCSA) HA

by Samuel Mitchell, posted in VMware

The following reference material from the vSphere 6.5 online documentation will assist you in covering the main information that is needed to know the topics in this objective:

  1. vCenter High Availability
  2. Edit the vCenter HA Cluster Configuration
  3. VMware KB 1024051 – Supported vCenter Server High Availability Options