2016 UPDATE.Finaly the paper was written, presented and published www.CMG.org
Here is the presentation slides:
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Capacity Management and Availability Management are two interconnected services. That connection is getting more important in current era of virtualization, clustering and especially for cloud computing. It is obviously, that IT customers not only want the sufficient capacity for their applications, but even more importantly want that capacity highly available.
Here is the presentation slides:
_____
Capacity Management and Availability Management are two interconnected services. That connection is getting more important in current era of virtualization, clustering and especially for cloud computing. It is obviously, that IT customers not only want the sufficient capacity for their applications, but even more importantly want that capacity highly available.
I have to deal with that combination recently and firmly believe that could be a great topic for up-coming CMG'13 conference. I plan to attend the conference, but unfortunately in spite I have a topic, the title "Is your Capacity Available?" and some already published in this blog related materials, I do not have ability to write the paper for this year CMG conference.
May be somebody could pick that idea up and share your experience in this mix area of Capacity and Availability? I would be extremely happy!
Here is the list of my posts related to this subject:
BTW The last post has some suggestion to estimate each node (component) availability (which is needed for a cluster availability calculation) by just looking at the Incident records history and use MTTR from there. Why not? If you have a good Incident Management that could be a very cheap solution! I would suggest to calculate different degrees of estimated availability, such as "Absolute" availability estimation based on up-time completely free from any incidents. Or "N-degree availability" number if only severity <= N incidents are taken in account or filtering out only incidents related to a particular component capacity - "Capacity Availability". Sure if Incident Management service is not mature enough, that will provide incorrect input for estimation. So you may consider other mechanisms I mentioned in that post... But from other hand that would encourage you (maybe via CSI) to improve your Incident management service!
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