207 items | 2 visits
Responsi Paul's List: Linux + Unix
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Aug 04, 11
This is intended to help fairly knowledgeable people get IPMI working on their hosts so they can issue remote commands to their hardware. I focus on Red Hat Enterprise Linux on a Dell, but it is likely to work on other hosts, distributions, and OSes, too. This works for me on Dell PowerEdge 1850, PowerEdge 2850, Dell PowerEdge 1950, and Dell PowerEdge 2950 hardware.
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Aug 04, 11
Need a serial console on your Linux box, just in case something happens to the network? Yeah, me too. It’s fairly simple to get it running (at least on Red Hat Enterprise Linux 4), if you have the right steps.
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Aug 08, 11
I manage a number of Linux Netbackup media servers, and just recently learned that Linux doesn’t provide a tool to view tape statistics (it appears there are no /proc interfaces to retrieve SCSI tape drive performance data). Fortunately the SystemTap developers saw this glaring deficiency, and created the iostat-scsi.stp script to display statistics for each SCSI tape and disk device in a server.
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Aug 20, 11
The following article presents an overview of the commands used to manage physical and logical volumes for use with Logical Volume Manager (LVM) in Linux.
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Aug 31, 11
inetd does rate-limiting. By default it stops at 40 connections per minute and then "punishes" you with 10 minutes of not listening anymore.
Thus one must make configuration updates accordingly... -
Aug 31, 11
The lore I found while googling is that cfq is the best I/O scheduler to use for HDDs. I was therefore under the preconception that cfq was best for HDDs, but you can see in the data that is NOT the case under most of the tested situations.
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Aug 31, 11
This article gives you a jumpstart on performing benchmark on filesystem using iozone a free Filesystem Benchmark utility.
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Sep 04, 11
an introduction in how to use strace, a commonly used debugging tool for system administrators, as a tool to gather information on the IO pattern of your code(s).
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Sep 06, 11
Ultra Monkey is a project to create load balanced and highly available services on a local area network using Open Source components on the Linux operating system, including heartbeat and ldirectord from the Linux-HA project.
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