Since July 2009
Systems & network engineer
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Working in the infrastructure team of France's original maps site, 13th french web destination (10M UV+300M PV/month), in a mixed Windows / Linux environment. I'm the go-to person for Linux & Internet technology matters.
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My main project is streamlining Linux server administration (setting up best practices, automated installs, centralized configuration management, virtualization, performance tuning, security policy...)
- Debian Linux, Puppet, Cacti, Memcached, Windows Server, Cisco, Nortel, Zeus ZXTM load balancer, VMWare, NetApp, Bind, Apache, IIS, MySQL, SQL Server, Postfix...
Since september 2007
Renaud Guerin Conseil (Paris, France)
Freelance consultant
- Experienced in Linux and Open Source since 1996, with a strong background and a passion for Internet operations, I help my clients design, build and fine tune their Linux systems and Internet infrastructure.
- Some recent assignments:
Network administration (about 40 days in 2008-2009, Reed Expositions),
Linux / TCP/IP training (about 50 days in 2008-2009, Pythagore FD),
Embedded software architecture consulting (7 days in 2008, multimedia set-top box project),
Emergency tuning of webservers under heavy traffic (2009)
- I also have a strong interest for Apple and digital audio technologies : iPhone, Mac client/servers, handling of multimedia streams, audio production, podcasts...
Since 2005
Gum Prod (music label, Paris)
Freelance systems engineer
- Re-designed hosting and took charge of systems administration for (most notably) joachimgarraud.com and davidguetta.com.
- Set up the hosting infrastructure for Joachim Garraud and David Guetta's music podcasts (often at the top of iTunes Store France charts, 100.000+ downloads / week) and the "Invasion" on-demand CD store.
- Debian Linux, Ubuntu, Plesk, Mac OS X, Bind, Apache, MySQL, Postfix, RSS, shell, PHP...
March 2004 - June 2007
(3 years+)
Orange Internet (ex-Wanadoo Portails) (ISP/hosting branch of France Telecom, Bagnolet, France)
Linux systems engineer
- Working on the main orange.fr hosting platform (#1 ISP and 3rd french site, 20M UV, 4.1B PV/month) : day to day operations, systems administration, security & performance tuning, reporting & monitoring, architecture, design & sizing of new projects, on-call duty (1500+ servers).
- Main accomplishment : architecture and roll-out of the new subscribers' home pages platform (Pages Perso Orange : 500,000 sites, several TBs of storage). Advanced software (DRBD) & hardware (HP) troubleshooting. Drastically improved performance and cut costs compared to the previous solution.
- HP/IBM servers, HP storage arrays, Linux (Debian, Redhat), Apache, high availability (LVS+Heartbeat+NFS+DRBD), iptables, cfengine, Windows 2003 Server, Cisco, Nortel ...
Sept. - Dec. 2003
(4 months)
Linux / TCP/IP trainer
- Took charge of Linux, TCP/IP, and Internet training sessions, mostly for audiences of experienced UNIX/Windows/Mainframe system administrators.
- Taught courses, developed practical case studies according to students' work environments.
Jan. - May 2003
(5 months)
R&D Software Engineer
- Developer in the embedded software team of the award-winning Freebox (DSL set-top box for France's #2 ISP Free.fr).
- Optimized key parts of the embedded Linux distribution for size. Modified the ADSL Sagem Fast 800 modem's kernel-mode drivers for internal use.
- C-based system-level development, custom Linux distribution, sockets/driver/kernel programming, busybox, uClibc ...
Feb. - Aug. 2002
(7 months)
INRIA (National Computer Science Research Institute, Sophia-Antipolis, France)
IP/network QoS research engineer (M.Sc internship)
- Within the PLANETE research group, evaluated the DiffServ framework for IP QoS, its issues and suitability for deployment in a carrier-scale IP network.
- Studied the state of the art for QoS algorithms (CBQ,WRR,RED,RIO...), and their implementation in networking equipment.
Created C++ modules for the ns-2 network simulator. Gained insight with working in a research team with industrial partners.
- Advanced TCP/IP, NS-2 network simulator, C++, TCL, Valgrind, LateX.
Sept. 2000 - Feb. 2001
(6 months)
Alcove (Linux services, Saint-Denis, France)
Infrastructure software engineer (B.Sc internship)
- Developed and rolled out a custom system for automated installation and centralized management of Debian Linux workstations at Alcove.
- Allowed me to learn fast with much of the Paris Linux community and Debian developers working there.
- C, Shell, Perl, advanced Debian, cfengine.
2000 - mid-2002
(2 years+)
Linux Systems Administrator (part time university job)
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During my studies, started the student web server project (web hosting and online services for 1500+ users). Designed, set up and admin'ed the infrastructure ( LAMP / Samba / NIS). Also set up a Squid proxy to speed up Internet access for students.
- Linux, Digital Unix, Mandriva, Debian, Squid, PAM authentication, Apache, MySQL ...
Apr. - Jun. 1999
(2 months)
Hexanet (regional ISP, Reims, France)
LAMP developer (internship)
- Developed a MySQL/PHP customer management application. Investigated IP firewalling and bandwidth management solutions on FreeBSD.
- Linux, FreeBSD, Firewall, ipfw, Apache, MySQL, PHP.
Jun. - Aug. 1998
(3 months)
Plastic System International (industry, Reims, France)
Freelance consultant
- Designed, developed and rolled out an intranet/web-based sales application. This gave me a first opportunity to interact and consult in a non-specialist environment.
- Linux, Apache, MySQL, PHP.
