This sounds weird, but I have witnessed it today, and had to work rather hard to figure the cause of the problem. When using ” Intel Corporation 82575EB Gigabit Network Connection (rev 02)” (as lspci reports), TCP offload causes problems. Symptoms: The host can communicate with the guest flawlessly (including HTTP get for larger than…
To burn Dual-Layer (or Double-Layer, of you stick to the official name for DVD+R) medias, I use growisofs. The syntax is as follow: growisofs -dvd-compat -use-the-force-luke=break:1913760 -Z /dev/scd0=file.iso Change the break blocks to match your own values, and replace the file.iso with the actual name of your ISO file. If you do not set layer…
As the owner of a nice laptop running Hardy, I had a huge performance degradation when accessing USB storage devices. Speed could reach 1MB/s at most, and usually, half that speed. The trick that solved my problem was suggested in this post, and after I have tested it, I was happy with the results. The…
Linux LVM is a wonderful thing. It is scalable, flexible, and truly, almost enterprise-class in every details. It lacks, of course, at IO performance for LVM snapshots, but this can be worked-around in several creative ways (if I haven’t shown here before, I will sometime). What it can’t do is dealing with a mixture of…
Redhat Cluster is a nice HA product. I have been implementing it for a while now, lecturing about it, and yes – I like it. But like any other software product, it has few flaws and issues which you should take under consideration – especially when you create custom “agents” – plugins to control (start/stop/status)…
This is not a simple task. Adding or compiling modules is a tricky feat when it comes to 2.4 kernels. It requires you compile the entire kernel yourself before. I have used a diskless machine, with an NFS mount as the place where I have kept all persistent data. Mounted it at /tmp/mnt directory. Preparations…
