Contrary to what I found on most websites when googling about comparisons between inkjet and laser printers, the cost per page on high end inkjet printers is lower than that of laser printers.
Moreover, when buying a new printer one has to consider the number of pages that will be …
At Cloudwatt, we have been operating a near hundred nodes Swift cluster in a unique datacenter for a few years. The decision to split the cluster on two datacenters has been taken recently. The goal is to have at least one replica of each object on each site in order …
When people talk about OpenStack Swift, we often hear the word Ring. This is because the Ring is a central piece in how Swift is working. But what is this thing everyone's talking about ?
The Ring refers to 3 files that are shared among every Swift nodes (storage and proxy …
With cloud Virtual Machines prices dropping month after month, we may be asking if the margins previously done by cloud operators were not outrageously high. I actually find surprising that current VM price is on average higher than equivalent dedicated server even though virtualization allows sharing more hardware.
My favorite option to backup and version my code and text files is using git with a remote repository. The implementation I have chosen for that consists in running an ssh server, with git, in a Docker container. This has the following advantages over other solutions:
As a data geek, I've been wondering how I could protect my data from the main threats (if possible by using only open source software). For instance, losing data because of a hardware failure is just something that shouldn't happen anymore, thanks to all the technology available today. One could …
This note summarizes articles from other places about Microsoft Windows images for OpenStack creation, along with some first hand experience. The whole process of creating Windows 2008 and Windows 2012 images fully usable on OpenStack instances is described there.
To achieve the creation of a qcow2 Windows image for …
Raspberry Pi devices are cheap, quiet, and powerful enough to run a Debian based Linux Operating System called Raspbian. Such device would be very convenient to manage one's personal infrastructure, composed of some physical and / or virtual machines, by running Chef Server.
While, the official Chef website mostly documents the …
When using several computers (or devices) from different locations, the question of data management arises. Basically, I wish being able to access my data from any computer; I wish my data to be protected, accordingly to its privacy and I wish my data to be backed up appropriately.
With the …
OpenStack uses a role based access control (RBAC) mechanism to manage accesses to its resources. With the current architecture, users' roles granted on each project and domain are stored into Keystone, and can be updated through Keystone's API. However, policy enforcement (actually allowing or not the access to resources according …