I wrote an internal EMC memo on licensing issues with Oracle on VMware as I get a lot of questions on this topic. But I’d like to expand the question a bit. After all, my blog is named “Dirty Cache”…
An IT infrastructure perspective on optimizing business applications
I wrote an internal EMC memo on licensing issues with Oracle on VMware as I get a lot of questions on this topic. But I’d like to expand the question a bit. After all, my blog is named “Dirty Cache”…
One request I got back after my series on Oracle RAC stretched clusters is if I could summarize again why anybody would choose VPLEX for storage replication over other solutions. My attempt was to describe the principles of VPLEX in…
Last year, EMC announced a new virtualization product called VPLEX. VPLEX allows logical storage volumes to be accessible from multiple locations. It boldly goes beyond existing storage virtualisation solutions (including those from EMC) in that it is not just a…
In my previous posts I described how Oracle ASM can be used to build stretched clusters. I also pointed to some limitations of that scenario. But I am by far not the first one in doing so – and some…
Before showing my preferred solution for Oracle stretched high availability clusters, first some clustering basics. Active/passive versus Active/Active clusters Most clustering software is based on active/passive scenarios. You have a system (say, a database) that is running on a set…