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Old

Extending an LVM volume on a VMWare host

Posted 08-23-2012 at 12:17 PM by sag47
Updated 03-25-2013 at 08:28 AM by sag47
Tags lvm, snapshot

Back story
This is going to be a short blog post. Mostly with commands. Basically I run a media server for online courses/lectures called Echo360 ESS. At some point the LVM volume which holds the lecture captures nearly filled up. I was getting Icinga alerts on it and by looking at the rate of data generation in munin showed me I had better hop to it. So that's what this post is about.

The fun stuff

Add disk to VM

I added a disk to the virtual...
Senior Member
Posted in Uncategorized
Views 956 Comments 0 sag47 is offline
Old

Leap second and Java woes

Posted 07-27-2012 at 12:25 PM by sag47
Updated 07-27-2012 at 12:27 PM by sag47

This is kind of an old event however I thought I'd talk about it for both myself in the future and for anyone looking for an answer when it happens again. There is a bug in java or the kernel in which leap seconds cause some really nasty behavior. For instance, All app servers which include Jetty, Tomcat, and JBoss were pegged at 100% CPU usage and ridiculously high load averages. I don't know if this affects weblogic because if I recall they ship their own custom build of java which may or may...
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Views 1089 Comments 0 sag47 is offline
Old

Removing files with find, and LVM snapshots

Posted 04-24-2012 at 11:21 AM by sag47
Tags find, lvm, snapshot

Take an LVM snapshot using a loopback device
Create the snapshot
Take a look at the devices in your volume group. First there needs to be sufficient space in the volume group for a snapshot to occur. Check this by typing: vgdisplay and checking for Free PE / Size
Code:
vgdisplay -v
Create a loopback device to use for the snapshot. My volume group is named vg_echo360. I want my snapshot to be 9.9GB in size so I'm creating a loopback device which is 10GB in size....
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Old

Making predictions and thinking like a computer

Posted 02-23-2012 at 07:33 PM by sag47
Updated 02-23-2012 at 07:34 PM by sag47

Another user from a different forum asked me a question. I gave, what I though was, a good answer so I'm posting it here for all LQ to enjoy.

Quote:
Originally Posted by Capt Kenpachi
Sar & Jim;

If I were to build a database that were to compare historical purchases for a single individual to forecast what they are likely to purchase again in the future...

I know I would use a SQL database to store the Historical Data on the individual.

But what would I use to comb through
...
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Views 528 Comments 0 sag47 is offline
Old

Monitoring sound over time for long periods to see trends using a microphone

Posted 02-09-2012 at 03:54 PM by sag47
Updated 02-09-2012 at 03:58 PM by sag47

Recently a post was made requesting a solution to detecting sound in a studio to see if it is populated with lots of noise (lots of noise=people/bands playing) this way the person monitoring it wouldn't have to go through the trouble of hulking all their stuff to the studio.

I posted an interesting solution so I'm sharing it here and a little more on this blog. See post #9 of this thread.

I'm going to expand upon that munin plugin and make it a little more robust and...
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