IKUS specializes in creating and developing software to simplify and optimize data recovery and backup management processes. As such, we developed the Minarca software, a comprehensive, reliable and robust advanced solution developed under an open-source license to contribute to the good of this community in which we are actively involved. Minarca integrates the features of the Rdiff-backup software based on a reverse differential backup process. This offers a definite advantage over other data backup software. However, this is not the only benefit! …


Reverse incremental backup

Minarca, the centralized data backup management software developed by IKUS, uses the features of Rdiff-backup software built on a reverse differential backup process. Rdiff-backup was chosen for the multitude of advantages it already offered, namely the fact that it can be used on multiple platforms (Linux, Unix, Windows, Mac), it can be configured from simple command lines, it has demonstrated stability and robustness, and it benefits the good of the open-source community. Reverse incremental backup is an additional advantage since it increases backup security.

Incremental backup

You may not know it, but the vast majority of data backup software uses an incremental…


In our previous article, we compared the two virtualization technologies available in Proxmox; LXC and KVM. After analysis, we find that both technologies deliver good CPU performance, similar to the host. On the other hand, disc reading and writing performance are far from advantageous for KVM. This article will delve deeper into our analysis to see how the different storage formats available for KVM, namely ZVOL, RAW and QCOW2, compare with the default configurations. Although we analyze only three formats, Proxmox supports several others such as NFS, GluserFS, LVM, iSCSI, Ceph, etc. …


Supermicro Server with Intel CPU

Since the company’s inception in 2011, we have used a variety of virtualization technologies. These technologies’ benefits are rather indisputable: cost reduction and ease of management (backup, migration, cloning, etc.) In fact, virtualization has become a must in the field of information technology.

Although we have good amount of experience with virtualization technologies such as VirtualBox and VMWare, our use of KVM and LXC is fairly recent. For some time now, we have migrated our entire infrastructure to Proxmox, an all-in-one virtualization solution.

To get the most out of this new infrastructure, we want to establish the best configurations to…


Many have asked about the differences between Rdiffweb and Minarca, backup management software developed by IKUS. If both these open-source products seem identical, it is because the Minarca backup system includes all of Rdiffweb’s functions. Minarca is a complete backup system providing a centralized view of the data from the backup of your computers and servers, whereas Rdiffweb is an interface allowing the visualization of your archive backups and their recovery if necessary. The article below explains their technical differences.

An Accessible Interface Versus an Advanced System for Professionals

The Rdiffweb app, available for download online, supports the autonomous management of backups for those with less technical knowledge. Through…


LSI SAS2008 Controller

We recently updated Supermicro Fat Twin SuperServer 6027TR-DTRF servers by replacing the SATA controller card with an SAS controller card.

On these models, it is necessary to replace the BPN-ADP-SAS2-L6i daughter board with an integrated LSI SAS2008 controller that is commonly used for RAID servers. By default, this SAS controller card works in IR mode (Integrated RAID) which supports RAID levels 0, 1, 5, 6.

As you may already know, it is possible to switch to IT mode (Initiator Target) which supports JBOD (Just a Bunch of Disk) which has the advantage of allowing the operating system to manage the…


The Rdiffweb app offers a simplified web interface for easy management of rdiff-backup, software that offers robust automatic backups from one Linux computer (client) to another Linux computer (server) using secure shell (SSH), thus maximizing your disk space. The free, open source online tool helps save time when accessing rdiff-backup archives, recovering data, and managing administrators. Recently, rdiff-backup received a major update with a host of new features when it was migrated to Python 3.

In this article, I’ll show you a basic way to set up rdiff-backup with Rdiffweb. …


In March 2020, rdiff-backup advanced to version 2, 11 years after the last major release. The deprecation of Python 2 at the beginning of 2020 was the impetus for this update, but it gave the development team the opportunity to incorporate other features and benefits.

For about two decades, rdiff-backup has helped Linux users maintain full backups of their data locally or remotely without needlessly draining resources. This is because the open source solution does reverse incremental backups-backing up only the files that changed from the previous backup.

The revamp (or, as some are saying, rebirth) came thanks to the…


ZFS is a relatively new file system available for the Linux platform. Its popularity is gaining speed thanks to its great management flexibility and its resilience. To learn more about the benefits of ZFS, check out our previous article.

Further to our article on the benefits of ZFS for rdiff-backup, you will find herewith more technical information which explains the best configuration practices for ZFS when used with rdiff-backup.

For starters

It is highly recommended to create a specific dataset for storing rdiff-backup deposits. …


In the past year, Linux has welcomed a newcomer to the file system area. With ext4 still being the de facto choice for desktops and most server installations, and with Btrfs failing to deliver the promise of a next generation file system, ZFS is delivering this long-awaited feature.

ZFS is not a “new” file system in the UNIX world. It has a relatively long history. First introduced in 2005 within OpenSolaris operating system, then ported to FreeBSD in 2008, and it was finally ported to Linux in 2013. …

Patrik Dufresne

Involved in the open source community for more than 10 years. He is the founding president of Ikus Soft inc.,

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