Posts By: jonny

Beginning MongoDB

MongoChef

Coming at MongoDB from a RDMS perspective (and specifically MySQL), things feel a little strange. Just sharing a few paragraphs on how I got started. Installation Installing MongoDB was easy following their instructions and using the 10gen repo for CentOS. After installation the mongo client can be used to access the server without any authentication… Read more »

Munstrap for Munin

Alternative Munin Template

Warm fuzzy feeling inside when you get emails like this: I had recently added my Munstrap template to the munin-contrib repository and had been talking to Steve about the template much earlier. Munstrap was based on Bootstrap and other interested people contributed to (and forked) my Github repo to improve Munstrap. Great to see a… Read more »

Intel Xeon Phi Co-Processor Setup

centos logo

Introduction Just adding my notes here in case it helps anyone else who finds themselves in a similar situation to me.I have two machines each with an Intel Xeon Phi Co-Processor board. This (in my basic view of the world) is like an extra machine inside the host machine but contains 240 processors clocking in… Read more »

Bulk Delete Emails in Gmail

Gmail bulk delete messages

I had a bunch of emails sent from one of my own automated notification systems that I wanted to remove from Gmail. Doing a search in Gmail showed the first batch of 50 emails but the key to removing them all in one go is when ticking the ‘Select All’ checkbox (see below) a message… Read more »

Solar Power Installation

Solar Panels on Roof

Just thought I would record a few notes/thoughts on my recent solar installation in case I need to illustrate it to anyone I know. For the solar photovoltaic (PV) panels there was two choices: Sharp (Japanese) or SolarWorld (German) panels. According to David (our installer) there is little difference bar aesthetics, although the Sharp ones… Read more »

CyanogenMod on the Samsung Galaxy Tab 2

cyanogenmod clockwork recovery image

I wanted to breath a little new life into a Galaxy Tab 2 (model P3110) that was about 18 months old, so dusting it off I followed the instructions on the CyanogenMod wiki. Roughly the steps were as follows: I downloaded and installed the Heimdall tool to my desktop computer I downloaded the Clockwork Mod… Read more »

Building Likwid RPMs for CentOS

centos logo

Installing likwid is easy (using ./configure, make, make install) however I wanted to create an RPM package to allow for repeatable builds and installation across a number of nodes/machines. With the ‘Development Tools’ package installed I started with:

I downloaded the latest likwid release (3.1.3) and copied it to

Then moved to the… Read more »

MySQL dummy placeholder RPM package for MariaDB

On CentOS 7 MariaDB has (quite rightfully IMHO) replaced MySQL in the repositories however this has caused me a few problems. Since MySQL was so widely used there are other things that have MySQL as a requirement/dependency. Mainly my problem was some puppet modules that wanted the mysql-server package installed before they would proceed with… Read more »

Local Ubuntu Repository

I wanted to set up a local repository for DEB packages I create to be installed among a number of cluster nodes. After building the deb package I added it to my home folder as follows and created the Packages.gz file:

I can now add a new line to my apt sources.list file as… Read more »