An Oracle Linux Network Installation

The docs on Red Hat Network Installations can also be applied to Oracle Enterprise Linux (OEL)... Easily. Just make sure that you may have to edit the file TRANS.TBL in Enterprise/RPMS.
You can also use Altiris to setup a Linux ftp deployment server. Just boot the OEL cd with the prompt:
linux askmethod
Then, the OEL CD image will ask you if you'd like to use the CD-ROM or opt for an NFS, ftp or http install source. Before you hit the OK key, make sure that the local CD image disk 1 is unmounted. If you don't, the network install will fail and you'll see the file product.img appearing in your logs. Try again, this unmount the boot CD image from which you started and then hit OK to start the network install. This fixed all my problems (after several hours).

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Tuning the nscd name cache daemon

I've been playing a bit with the nscd now and want to share some tips related to tuning the nscd.conf file. To see how the DNS cache is doing, use nscd -g. nscd configuration: 0 server debug level 26m 57s server runtime 5 current number of threads 32 maximum number of threads 0 number of times clients had to wait yes paranoia mode enabled 3600 restart internal passwd cache: no cache is enabled [other zero output removed] group cache: no cache is enabled [other zero output removed] hosts cache: yes cache is enabled yes cache is persistent yes cache is shared 211 suggested size <==== 216064 total data pool size 1144 used data pool size 3600 seconds time to live for positive entries <==== 20 seconds time to live for negative entries

Preventing PuTTY timeouts

Just found a great tip to prevent timeouts of PuTTY sessions. I'm fine with timeouts by the host, but in our case the firewall kills sessions after 30 minutes of inactivity... When using PuTTY to ssh to your Linux/Unix servers, be sure to use the feature to send NULL packets to prevent a timeout. I've set it to once every 900 seconds, i.e. 15 minutes... See screenshot on the right.

Setting up SR-IOV in RHEL6 on PowerEdge servers

Dell Community : "RHEL 6 provides SR-IOV functionality on supported hardware which provides near native performance for virtualized guests. Single-Root I/O Virtualization (SR-IOV) specification, introduced by PCI-SIG details how a single PCIe device can be shared between various virtualization guests. Devices capable of SR-IOV functionality support multiple virtual functions on top of the physical function. Virtual Function is enabled in hardware as a light weight PCIe function. Operating System cannot discover this function as it does not respond to the PCI bus scan and requires support in the host’s driver. As in PCIe pass-through, a Virtual function of a SR-IOV capable card can be directly assigned to the guest operating system. A virtual function driver running in the guest manages this device."

Oracle: Unbreak my Linux Heart

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