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ESXi – RDM disks with SAS Storage (local or shared)

29 November 2011
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Reading Time: 2 minutesThe RDM disks are a feature of VMware vSphere (but was present also in Virtual Infrastructure) to make a “mapping” between a LUN (or logical disk) to a VM (is similar to a disk pass-through). This feature can be used in different cases, for example: to support disk larger than 2 TB (only in vSphere 5 with physical RDM) and to implement guest clustering with shared storage (still only with physical RDM). But there is an issue (or a feature :) ) that does not allow to add a RDM disk from the GUI for […]

Highlights, VMware, vStorage

New in vSphere 5 – VMware HA

28 November 2011
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Reading Time: 2 minutesWith vSphere 5, the VMware HA part has been completely change on the implementation part, but the nice aspect is that it seems still the change on the user part (this is a good example on how improve in a painlessly way). In vSphere 5.0 the new HA agent is “FDM” (Fault Domain Manager) and replace the old AAM agent (from EMC Legato). But not only the agent has changed: The old Primary / Secondary node concept has been replaced by a new and more simple Master/Slave node concept A new Datastore Heartbeat function as […]

VMware none

Supported means that works well?

25 November 2011
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Reading Time: 2 minutesIn the previous post I’ve consider the cases and scenarios of a “non supported” configurations. But what’s happen with “supported” configurations? Are they always working and always in the best way? A supported configuration means that it can work well, but in specific situations, cases, scenarios. Usually a good rule could be make a good analysis and a good virtual design before choose the single pieces. A supported configuration does not mean that also meets requirements like availability, scalability and performance. For example there are a lot of entry storage that are VMware certified, but […]

Highlights, vProducts none

Not supported means that it does not work?

24 November 2011
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Reading Time: 2 minutesIn previous posts related to vSphere 5 upgrade, I’ve talked several time about the HCL and his relevance. For a production environment, have a completed supported configuration, in each parts (hardware, software, firmware, …) IMHO is mandatory. But “not supported” not always means “not working”. There are different scenarios with an “unsupported configuration”:

Highlights, vProducts none

Upgrading to ESXi 5 vs. doing a Fresh Install

23 November 2011
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Reading Time: 3 minutesIn a vSphere upgrade process, there are two different approach for the host upgrade: a fresh re-install or a in-line upgrade. In the VMware site there is an interesting post about this choice. The differences between an upgraded host and a freshly installed host are:

Highlights, VMware , , ,

XenServer 6.0 vs. vSphere 5.0

22 November 2011
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Reading Time: 3 minutesThe new major release of Citrix’s hypervisor was released on Sep, 30 2011 (XenServer 6.0 is here! ). For more info see also the Release Notes for Citrix XenServer 6.0. Architectural Changes: The Boston release is based on the open-source Xen 4.1 hypervisor.   XenServer is another commercial product to ship with the Xen 4 hypervisor.  For those of you who like to follow the open source world, Oracle VM 3 launched a few weeks ago, and is based on the Xen 4 hypervisor.  Ubuntu Server 11.10 will soon follow with support for Xen 4, and […]

Citrix, VMware, vProducts , ,

RHEV 3.0 vs vSphere 5.0

21 November 2011
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Reading Time: 2 minutesSome days ago Red Hat has announced the availability of its Red Hat Enterprise Virtualization (RHEV) 3.0 public beta. The first beta of RHEV 3.0 was announced in August, but was not available to the general public. You needed to have an active RHEV subscription at that time. The evaluation is immediately available to anyone with a Red Hat Network account. About the new features and the improvements there is a specific page on RedHat site. Red Hat Enterprise Virtualization 3.0 includes updates such as: Red Hat Enterprise Virtualization Manager is now a Java application […]

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