Shell Tips !

Here is a quick post about a cheap SAN and secure backup architecture solution for small-sized platform (5/10 servers). In this study case we will see how to use Network Block Devices (nbd) and soft-raid with mdadm. I design it for my personal web platform which is a small one. Last day, I was missing of free space on my backup server and I was angry by the idea to rent a most expensive server to store my backup while I had lot of unused space on my other servers.

1. Initial platform
2. New platform
3. How to do it ?

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If you are a PHP developer or a LAMP server admin you probably have already heard about the Zend Platform. After some test and configure/tunning step, we deployed this solution on a heavy loaded production server running with Apache 2.x, PHP 4.4.x, MySQL Client 5.x.

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I started to write this post many weeks ago and finally publish it even if it’s not totally finish. It is just a little feedback about tuning a full LAMP server with some user traffic and services load. Important thing to notice is that all stuff in this post is NOT THE SOLUTION. You will probably have to tune little more for adapt all this to your personal server usage, server load, development & architecture. So, use those tips as a kind of inspiration instead of an “how to”. Don’t forget that when you do such tuning, take care to keep a backup of your previous configuration files.

We will try to tune the following server :

• Current OS : Debian GNU Linux Kernel 2.4.32 ipv4 + GRSEC
• 1Go RAM DDR
• Intel(R) Celeron(R) CPU 2.66GHz
• SWAP 512Mo
• 3Go on / and 226Go on /home
• Running services are Qmail, Bind9, mrtg, Apache 2.2.2, PHP 5.1.4, MySQL 5.0.21

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