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vSphere cluster: max 4 ESX hosts per “location” because of HA limitations?

Posted on February 3, 2010 by Matthijs Haverink

Not a lot of info is found when you Google for manually selecting/fixing the primary HA nodes in a VMware VI or vSphere environment. Of course Duncan Epping has a couple of extremely interesting posts on Yellow-Bricks.com concerning HA even when it comes down to selecting or promoting the HA status of ESX nodes (a must read!), but I want more …

Let’s start with what I assume to know about HA:

- HA works with primary and secondary HA nodes
- The primary nodes are aware of the states and configs of all nodes in an HA cluster
- The secondary nodes depend on the primary nodes
- There is an supported limit of 5 primary HA nodes per cluster
- The first 5 ESX hosts that are added in a HA cluster are initially defined as primary HA nodes
- All the other hosts that are added to the HA cluster are configured as secondary HA nodes
- There’s a way to configure a HA node as primary or secondary, however it’s not possible to configure an ESX host as a “fixed” primary HA node:
… Continue Reading

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Next release of Xenserver public beta release available now

Posted on July 31, 2008 by Sven Huisman

The Citrix blog announces the following news:

The public beta is available of the next release of Xenserver. Highlights of the release include:

  • Automated high availability
  • Windows Server 2008 guest support
  • Persistent performance statistics and metrics
  • Fully integrated Fibre Channel multipath support with configuration via XenCenter
  • VM grouping, searching and tagging
  • Email alerts
  • Disaster recovery for VM metadata
  • Active/active NIC aggregation
  • Xen hypervisor updated to version 3.2
  • XenConvert P2V migration tool
  • Wider hardware support
    …and many more.  … Continue Reading
2

VMware’s Diane Greene about virtual future

Posted on June 5, 2008 by Sven Huisman

EWeek.com had a Q&A with VMware‘s president and CEO Diane Greene. She talks about how virtualization has changed the last year and how she thinks virtualization will develop the next 12-18 months. It’s a good read, and here are some things that interested me the most: … Continue Reading