This article describes how to set up a very lightweight VNC service under CentOS/Red Hat. Intro In Red Hat Enterprise Linux (and derivates, I use CentOS) you can run a VNC service to allow graphical connections to a linux system.…
Debunking Oracle certification myths
Another frequently asked question I get asked a lot: Is Oracle certified on Vmware? There are plenty articles discussing this very topic, here’s a few examples: oracle blog – is Oracle certified on VMware vmware understanding oracle certification support licensing…
ZFS and Database fragmentation
Yet another customer was asking me for advice on implementing the ZFS file system on EMC storage systems. Recently I did some hands-on testing with ZFS as Oracle database file store so that I could get an opinion on the…
Performance – The database stack
As mentioned before, I frequently find myself in discussions around Oracle performance and how an Oracle database behaves on EMC storage. It turns out that often there is a lot of confusion on how the different layers interact with each…
Limitations of host-based mirroring for stretched clusters
For data mirroring, EMC SRDF is sometimes used in such a setup that both servers write to one location only (the “far” server writes across dark fibre links to the local storage). EMC has similar tools (Mirrorview, Recoverpoint, etc) for…