This post is the first in what I suspect will be a semi-long list of post-install hints and tips as I go through and start rebuilding my cluster as Vsphere 4. Hopefully I will learn a lot along the way... like for example the fact the ntp and snmp traffic is not allowed by default … Continue reading ESX Post Install – Enable NTP and SNMP
vmware
How to Configure NTP in a RHEL/CentOS Vmware Guest
HourglassSuccessful time keeping in a Virtual Machine can be a bit confusing. At times I have been told to use Vmware Tools to sync time between the Guest and the Host, and at time I have been advised to avoid this functionality and use NTP. The following information is direct from a VMwareKB article (updated, 4/16/2010) so I am going to follow their lead on this and use NTP exclusively.
Redhat I/O Scheduler Configuration in a Virtual Machine.
The Linux kernel controls disk I/O scheduling, and is responsible for its optimization. One of the ways that it does this is via an I/O elevator to reorder and schedule pending I/O requests in order to minimize the time spent moving the disk head. This reduction in movement results in a reduction in disk seek time which in turn, maximizes hard disk throughput.
How to Disable DRS for one VM in a DRS Enabled Cluster
In order to override the default DRS cluster settings for a vm, you need to do the following.
VMK load_Mod panic failed to load module VMFS2
This past weekend I was doing a few memory upgrades when one of the boxes that I was working on decided not to boot up properly. This was a bummer considering that it was 2am. Networking did not start properly so I was unable to ssh to the box, however I found the above error … Continue reading VMK load_Mod panic failed to load module VMFS2