Flatpak 1.0 to be Released

Flatpak is the the Linux desktop app distribution framework
21 August 2018   1233

Developers presented a stable version of Flatpak 1.0 - a framework for building self-contained packages that are not tied to a specific Linux distribution. Among the supported systems: Debian, Fedora, Linux Mint and Ubuntu. Applications collected using Flatpak are runing in an isolated container outside the OS.

Flatpak-program contains only specific dependencies: the basic system and graphic libraries are connected as runtime-environments individually for each distribution. This allows you to run test or suspicious application iterations in a separate sandbox, and also to update packages without changing the system.

Key Features of Flatpak 1.0

  • Developers can separately mark out-of-date versions of packages, so during their installation, the user will receive a warning about this.
  • Applications can now create a separate sandbox and restart themself..
  • New utility flatpak-spawn. It works through the Portals API and is needed to create isolated environments and run commands on the host side.
  • Packages ca be installed through P2P (from USB-drives or on the local network) by default, with support for bundle-packages.
  • The Flathub service, containing both development tools and ready-made applications, has received the status of a stable project.
  • Stable release of the runtime platform by default Freedesktop, built using the new BuildStream system.
  • Internal reorganization of the code, improvement of overall stability and performance.

More information on the new version can be found on the Flatpak project GitHub page..

LizardFS 3.13.0-rc2 to be Rolled Out

The release of LizardFS 3.13.0 with  Raft consensus algorithm as a main innovation is scheduled to be released in late December
12 November 2019   143

After a year-long pause in development, work on the new branch of the fault-tolerant distributed file system LizardFS 3.13 was resumed and the second candidate for releases was published. Recently there was a change of ownership of the company developing LizardFS, a new leadership was adopted and the developers changed. Over the past two years, the project has moved away from the community and did not pay due attention to it, but the new team intends to revive its previous relations with the community and establish close interaction with it. The project code is written in C and C ++ and is distributed under the GPLv3 license.

LizardFS is a distributed cluster file system that allows you to disperse data across different servers, but provide access to them in the form of a single large partition, the work with which is carried out by analogy with traditional disk partitions. The mounted section with LizardFS supports POSIX file attributes, ACLs, locks, sockets, channels, device files, symbolic and hard links. The system does not have a single point of failure, all components are redundant. Parallelization of data operations is supported (several clients can access files at the same time).

The release of LizardFS 3.13.0 is scheduled to be released in late December. The main innovation of LizardFS 3.13 is the use of the Raft consensus algorithm (using its own implementation of uRaft, which was previously used in commercial products) to ensure fault tolerance (switching master servers in the event of a failure). Using uRaft simplifies setup and reduces latency when recovering from a failure, but requires at least three working nodes, one of which is used for quorum.

Among other changes: a new client based on the FUSE3 subsystem, solving problems with error correction, the nfs-ganesha plugin was rewritten in C language. The 3.13.0-rc2 update fixes several critical errors that made the previous test releases of the 3.13 branch unsuitable for use (patches for the 3.12 branch have not yet been published, and the upgrade from 3.12 to 3.13 still leads to complete data loss).

In 2020, work will focus on developing Agama, the new completely rewritten core of LizardFS, which, according to the developers, will provide a three-fold increase in productivity compared to branch 3.12. Agama will make the transition to event-driven architecture (event driven), asio-based I / O based on asio, work primarily in user space (to reduce the dependence on kernel caching mechanisms). In addition, a new debugging subsystem and network activity analyzer with support for performance tuning will be offered.

Full support for versioning write operations will be added to the LizardFS client, which will increase the reliability of disaster recovery, solve the problems that arise when different clients share the same data, and will achieve a significant increase in performance. The client will be transferred to its own network subsystem operating in user space. The first working prototype of LizardFS based on Agama is planned to be prepared in the second quarter of 2020. At the same time, they promise to implement tools for integrating LizardFS with the Kubernetes platform.

Get more info at the official website.