Category Archive: Site Feeds

May 24

Want a free Kindle version of the VMware vSphere 4.1 HA and DRS technical deepdive?

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May 24, 2012

Just a limited offer, two days only… The VMware vSphere 4.1 HA and DRS tech deepdive is free. WHAT? Yes it is free… $ 0,-. So hop over to amazon and pick up your free Kindle copy today!

For those who have been living under a rock, this book will explain the ins and outs of both vSphere HA and DRS. Admission Control, Resource Pools, Limits, HA Restart Timelines… it is all in there. Pick it up!

“Want a free Kindle version of the VMware vSphere 4.1 HA and DRS technical deepdive?” originally appeared on Yellow-Bricks.com. Follow us on Twitter and Facebook.
Available now: vSphere 5 Clustering Deepdive. (paper | e-book)

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Permanent link to this article: http://www.startswithv.com/2012/05/24/want-a-free-kindle-version-of-the-vmware-vsphere-4-1-ha-and-drs-technical-deepdive/

May 23

vSphere Metro Storage Cluster white paper released!

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May 23, 2012

I wanted to point you guys to a white paper that I have worked on for the last months. This white paper was written in collaboration with Lee Dilworth, Ken Werneburg, Frank Denneman and Stuart Hardman. Thanks guys for taking time out of your busy schedule to work with me on this project! This white paper is about vSphere Metro Storage Cluster solutions (aka stretched clusters) and specifically looks at things from a VMware perspective. Enjoy!

  • VMware vSphere Metro Storage Cluster (VMware vMSC) is a new configuration within the VMware Hardware Compatibility List. This type of configuration is commonly referred to as a stretched storage cluster or metro storage cluster. It is implemented in environments where disaster/downtime avoidance is a key requirement. This case study was developed to provide additional insight and information regarding operation of a VMware vMSC infrastructure in conjunction with VMware vSphere. This paper will explain how vSphere handles specific failure scenarios and will discuss various design considerations and operational procedures.
    http://www.vmware.com/resources/techresources/10284

“vSphere Metro Storage Cluster white paper released!” originally appeared on Yellow-Bricks.com. Follow us on Twitter and Facebook.
Available now: vSphere 5 Clustering Deepdive. (paper | e-book)

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Permanent link to this article: http://www.startswithv.com/2012/05/23/vsphere-metro-storage-cluster-white-paper-released/

May 17

Why is my pathing policy limited to “fixed” or “MRU” with things like MSCS cluster?

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May 17, 2012

Yesterday I received an email from someone. He wanted to know why he was limited to using either the “fixed” or “MRU” pathing policy for the LUNs attached to his MSCS cluster. In his environment they used round-robin for everything and not being able to configure all of them with the same policy was against their internal policy. The thing is that if round-robin would be used and the path would switch (by default every 1000 I/Os) the SCSI-2 reservation would need to be re-acquired on this LUN. (MSCS uses SCSI-2 reservations for their cluster devices) As you can imagine that could cause a lot of stress on your array and could lead to all sorts of problems. So please do not ignore this recommendation! Some extra details can be found in the following KB articles:

“Why is my pathing policy limited to “fixed” or “MRU” with things like MSCS cluster?” originally appeared on Yellow-Bricks.com. Follow us on Twitter and Facebook.
Available now: vSphere 5 Clustering Deepdive. (paper | e-book)

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Permanent link to this article: http://www.startswithv.com/2012/05/17/why-is-my-pathing-policy-limited-to-fixed-or-mru-with-things-like-mscs-cluster/

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