I have had a system panicking when running the mentioned below configuration: RedHat RHEL 4 Update 6 (4.6) 64bit (x86_64) Dell PowerEdge servers Oracle RAC 11g with Clusterware 11g EMC iSCSI storage EMC PowerPate Vote and Registry LUNs are accessible as raw devices Data files are accessible through ASM with libASM During reboots or shutdowns,…
Installation of minimal selection of Centos 5 – only base, core and dialup selections, will leave a small-sized system, with the minimum required. This is a good setup to start setting up a firewall, and it lets you add any required package later using ‘yum’. This said, you cannot forward X over SSH at this…
My brother is a computer illiterate. He can use a computer for the purpose of e-mail messaging and for editing documents, spreadsheets, etc. I have decided to “abuse” his older laptop, an IBM X31 and install Ubuntu on it. This is some sort of an experiment. I wonder how he, a simple user, can cope…
I have been introduced to a very cool software/hardware combination yesterday. It has been, without exaggerating, one of the coolest things I have seen in a while. As you may know, x86 has an issue with scaling up. It’s that x86 architectures and price don’t justify scaling up to tenths and hundreds of CPUs. The…
Sysstat package, for me, is a must on any Linux machine I get to deal with. It allows for easy collection of performance data, and it allows easy postmortem of past (short past, anyhow) problems. For me, the only change from RHEL4 defaults is by setting the time interval to one minute, in stead of…
Linux works perfectly well with multiple storage links using dm-multipath. Not only that, but HP has released their own spawn of dm-multipath, which is optimized (or so claimed, but, anyhow, well configured) to work with EVA and MSA storage devices. This is great, however, what do you do when mapping volume snapshots through dm-multipath? For…
