Oracle Labs by Yuri Khazin, Oracle DBA

April 26, 2011

VirtualBox 4.0.4 and network


It is always exciting to play with new release of this favorite toy of mine. Not this time though. There are some changes in release 4.0.4 that I could not cope with. I was using release 3.2.12 before, it looks very modest and just works well. So first thing I have noticed in the new release was the sweeping changes to overall GUI, then I was puzzled by a disappearance of the button “New” in the “Virtual Media Manager” interface and finally, when installing OEL 5.2 (Red Hat), I could not get the Host-Only networks to actually work (the adapters were up and running but not accessible from host).

Some people have already complained about the problem that manifests itself as error message:

“the value of the MAC address field on the network page is not complete”

You can look at the discussion on the topic here (but there was no resolution at that time):

http://forums.virtualbox.org/viewtopic.php?f=6&t=38253

According to some, the problem surfaces when you have more than one network interface, according to others it is only with some operating systems. As of this moment I gave up on this new release and reverted back to 3.2.12

February 10, 2011

Shareable disks in Virtual Box


Recent versions of Virtual Box (4 and up) have support for “shareable” disks. This feature lets you build a RAC without using Openfiler or some other sort of SAN/NAS simulation software. Saves you one virtual machine in the setup.

I am not sure if this setup can be used with Oracle 10g RAC and whether this feature is stable enough, but here is an article by Tim Hall that describes Oracle 11g RAC built around this kind of disks.

Update: created shareable disks in 3.2.12 and used them under OEL 5.2 (you still need some clusterware-like software to properly share the disks).

November 18, 2009

Linux, UNIX and Oracle – automating database startup and shutdown

Filed under: Oracle Database — Tags: , , , , — oraclelabs @ 15:14

How to automate database startup and shutdown when your server restarts.

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October 10, 2009

VMware on Fedora Linux (F9) – some adjustments


This article addreses several problems that may be encountered when installing VMware Server 1.0 in Fedora Linux (F9) as host and running Red Hat like Linux as guest.

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