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The Tin Hat | Simple Online Privacy Guides and Tutorials Clustered Filesystem with DRBD and OCFS2 on CentOS 5.5 - Tutorials / Howtos - Sysconfig's Wiki Months ago I've published Clustered Filesystem with DRBD and GFS2 on CentOS 5.4 in this wiki. Now I would like to give another option – OCFS2, which is a clustered filesystem developed by Oracle. OCFS initially was focused on use with Oracle's databases, but with OFCS2 it's a general-pupose cluster filesystem. It's available as open source, and Oracle does a quite good job publishing packages and modules for each and every kernel version (so you don't need to re-compile it over and over again when you update your kernel). You will notice that this howto is very similar to the GFS2 howto mentioned earlier. For this short tutorial, I assume that you have set up identical unused disk partitions on both nodes (sdf in this tutorial) ideally, the two nodes are connected via a distinct network link, and IP addresses have been assigned (I'm using and here) you are running CentOS 5.x on both nodes Unless stated otherwise, please do everything on both nodes! , for example:

JStylo-Anonymouth - PSAL From PSAL The JStylo and Anonymouth integrated open-source project (JSAN) resides on GitHub. What is JSAN? JSAN is a writing style analysis and anonymization framework. It consists of two parts: JStylo - authorship attribution framework Anonymouth - authorship evasion (anonymization) framework JStylo is used as an underlying feature extraction and authorship attribution engine for Anonymouth, which uses the extracted stylometric features and classification results obtained through JStylo and suggests users changes to anonymize their writing style. Details about JSAN: Use Fewer Instances of the Letter "i": Toward Writing Style Anonymization. Tutorial JSAN tutorial: Presented at 28c3 video Download Downloads: If you use JStylo and/or Anonymouth in your research, please cite: Andrew McDonald, Sadia Afroz, Aylin Caliskan, Ariel Stolerman and Rachel Greenstadt. If you use the corpus in your research, please cite: Michael Brennan and Rachel Greenstadt. Developers

Avoiding SPOF -- Clustered, replicated Storage with GlusterFS - Tutorials / Howtos - Sysconfig's Wiki In an environment where high availability is crucial, you won't be able to work without cross-machine replication in the long run. While normal RAIDs, backups, and networked file systems are reasonable ways to protect yourself from data loss and allow to access the same data from multiple hosts, they still leave you with a single point of failure, the storage itself. There are plenty of rather expensive solutions out there, which come with two machines and multiple NICs in one box, accessing the same RAID array (for example NetApp®). GlusterFS can help here. In this mini tutorial, I'd like to describe how to create a replicated clustered storage with two machines. This short tutorial is based on CentOS 5.4 x64, but the GlusterFS team also provides binaries for other RedHat based systems and Debian (including derivates), as well as the source code. So let's go... Obtaining and Installing the Binaries All relevant binaries can be found here:

The 20 Coolest Jobs in Information Security #1 Information Security Crime Investigator/Forensics Expert#2 System, Network, and/or Web Penetration Tester#3 Forensic Analyst#4 Incident Responder#5 Security Architect#6 Malware Analyst#7 Network Security Engineer#8 Security Analyst#9 Computer Crime Investigator#10 CISO/ISO or Director of Security#11 Application Penetration Tester#12 Security Operations Center Analyst#13 Prosecutor Specializing in Information Security Crime#14 Technical Director and Deputy CISO#15 Intrusion Analyst#16 Vulnerability Researcher/ Exploit Developer#17 Security Auditor#18 Security-savvy Software Developer#19 Security Maven in an Application Developer Organization#20 Disaster Recovery/Business Continuity Analyst/Manager #1 - Information Security Crime Investigator/Forensics Expert - Top Gun Job The thrill of the hunt! You never encounter the same crime twice! Job Description SANS Courses Recommended Why It's Cool How It Makes a Difference How to Be Successful - Stay abreast of the latest attack methodologies.

Ceph: un système de fichier distribué à surveiller | InZeCloud.Fr A l’instar de MooseFS , Ceph est un système de fichier distribué. Son architecture matériel & logiciel repose sur: un groupe de serveurs de stockage (appelés OSDs), un ensemble de serveurs de métadonnée (MDS) et quelques services de monitoring qui ont pour vocation de gérer la cohérence de l’ensemble en fonction de l’états des différents noeuds. L’architecture logique, quant à elle, se compose de deux couches: la première est une couche d’abstraction intitulé RADOS qui fournit un espace de stockage distribué, évolutif (scalable) et à tolérance de panne. La seconde, Ceph lui même, utilise les services de la précédente pour stocker les fichiers et fournit un jeu de commande compatible POSIX pour y accéder. Il existe différentes méthodes pour intéragir avec Ceph: Les serveurs de metadonnées : il s’agit d’un ensemble de serveurs qui conservent les informations relatives au fichiers sous la forme de métadonnées et en propose l’accès via un point de montage. Mise en oeuvre d’un cluster Ceph

A/I :: Home Gestion des snapshots dans MooseFs | InZeCloud.Fr En regardant les statistiques de visite sur ce blog et notamment les mots clés qui permettent d’y aboutir, la question de la gestion des snapshots dans MooseFS revient fréquemment. Voici donc un (tout) petit article sur le sujet. Définition A l’instar de la virtualisation, un snapshot permet de figer l’état ‘E’ d’un objet (ici fichier, répertoire ou arborescence) à un instant ‘T’. Gérer les snapshots dans MooseFS Dans les faits, prendre un snapshot ressemble à une copie de fichier à ceci prêt que dans le cas d’un système de fichier distribué les contraintes sont plus fortes. Pour prendre un snapshot dans MooseFS la commande est simple: # mfsmakesnapshot [-o] source destination Deux petites remarques: La source peut être un fichier, un répertoire ou une arborescence de répertoires. Conclusion C’est déjà terminé. Suggestions:

A Declaration of the Independence of Cyberspace by John Perry Barlow <> Governments of the Industrial World, you weary giants of flesh and steel, I come from Cyberspace, the new home of Mind. On behalf of the future, I ask you of the past to leave us alone. We have no elected government, nor are we likely to have one, so I address you with no greater authority than that with which liberty itself always speaks. Governments derive their just powers from the consent of the governed. You have not engaged in our great and gathering conversation, nor did you create the wealth of our marketplaces. You claim there are problems among us that you need to solve. Cyberspace consists of transactions, relationships, and thought itself, arrayed like a standing wave in the web of our communications. We are creating a world that all may enter without privilege or prejudice accorded by race, economic power, military force, or station of birth. Our identities have no bodies, so, unlike you, we cannot obtain order by physical coercion.

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