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SC'10 - Comme and visit us at our XtreemOS booth!

The SC Conference is the premier international conference for high performance computing (HPC), networking, storage and analysis.

The XtreemOS project will be present at SC'10 at booth n°1631 (click here to see the conference floor plan).

A delegation of researchers from the consortium will showcase XtreemOS: the project current achievements will be presented, especially the last advancements, software release and demos (our third release will be out in the coming days).

XtreemOS participants: Christine Morin, Yvon Jégou, Pierre Riteau

Dates: November 13-19, 2010

Venue: Ernest N. Morial Convention Center, New Orleans, LA



Kerrighed rc for XtreemOS

A Kerriged 3.0 release candidate is available at

Changes are the following:
   * [kernel] Port to linux 2.6.30
   * Add various options to checkpoint and restart
   * Add tools ipccheckpoint and ipcrestart to help checkpoint/restart of applications using IPC objects
   Kerrighed containerization
   * [kernel] Run Kerrighed in a Linux container
   * New tools krgboot[_helper] and krginit[_helper] to run Kerrighed in a Linux container
   * Fully automatic cluster boot
   Kerrighed hotplug
   * [kernel] Experimental support for adding nodes to a live cluster
   * New krgadm semantics:
     * kill commands 'cluster start' and 'wait_start',
     * make command 'nodes add' the default way to build a cluster

   * [kernel] Support migration of X connections
   * [kernel] Many bugfixes in socket migration
   * [kernel] Support migration / remote fork of chrooted applications
   * [kernel] Many migration fixes
   * Remove limitation on number of concurrent executions in KTP


XtreemOS 2.1 out very soon!

Filed Under:
This release update will include:
  • Improved installer with a new xosautoconfig tool to greatly simply and automate installation of XtreemOS instances.
  • A number of high impact bug fixes, along with work on stability and correctness.
  • XtreemFS 1.2, which has a number of new features along with enhanced performance and stability
  • XtreemOS MD (Mobile Device) - This new version integrates XtreemOS on Internet Tablets, beginning with the Nokia N810. This makes it possible to launch jobs and interact with XtreemOS resources via a special client.
  • Virtual Nodes - a framework to provide fault tolerance for grid applications by replicating them over multiple nodes.
  • XOSSAGA - a set of technologies to allow you to run SAGA compliant  applications on top of XtreemOS unmodified.



Luscious Lebkuchen: XtreemFS 1.2 now available

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XtreemFS 1.2 ("Luscious Lebkuchen") is now available at

New features:
  • asynchronous MRC database backups (database dumps are created in the background)
  • new GRID SSL mode: SSL is used for authentication only, data is transferred via plain TCP for a better performance
  • Vivaldi-based replica selection and placement
  • MRC and OSD wait and retry for a configurable time span if they cannot reach the DIR on startup
  • faster file copying of files with 'cp' (by providing correct values for 'st_blksize' with 'getattr')
  • additional binaries with standard Unix names (mount.xtreemfs, mkfs.xtreemfs, lsfs.xtreemfs, rmfs.xtreemfs)
  • experimental Hadoop file system driver for XtreemFS
  • web-based admin console
We also fixed most of the bugs recorded in the tracker.


When upgrading your XtreemFS installation from 1.1 to 1.2, MRC and DIR databases should be converted automatically, without the need for human intervention. However, for safety reasons, we suggest to create an XML dump with the old release before updating; see "Updating" section in the XtreemFS FAQs (


XtreemOS at SuperComputing 2009

XtreemOS exhibited for the 3rd time this year at Supercomputing '09 in Portland, Oregon. Sharing the booth were consortium partners INRIA, CNR, VUA, ZIB and Kerlabs.

During the show, the new version 2.0 of XtreemOS was demoed (along with the latest version of Kerrighed using their cluster in a box). Interest from visitors ranged from university faculty interested in integrating XtreemOS in their teaching to other research institutions wishing to join future development.



Despite the economic crisis, there were not many signs of retrenchment in investment or research in HPC (high performance computing). A number of ambitious future projects were unveiled at Supercomputing, along with record numbers of visitors.

One other highlight from the show was the keynote from former U.S. Vice President AL Gore, who addressed the topic of how supercomputing can be used to harness solutions to global climate change science.

Already, space for SC '10 is nearly sold out, which portends another record breaking exhibition.


XtreemOS in the news

Filed Under:

XtreemOS 2.0 release announcement


XtreemOS 2.0 release now available!

Filed Under:

XtreemOS 2.0 Release


Rennes, France Nov 12, 2009The XtreemOS project has released the second public release of its Linux-based Grid operating system under the motto "Making Grid Computing Easier". The consortium has conceived and integrated a platform of open source technologies to enable easier usage, management, scalability and programming on top of Grid computing resources.


XtreemOS brings new capabilities to Grids, such as easing job submission and monitoring, while providing a comprehensive security implementation and virtual organization management. XtreemOS comes in three flavours: The PC flavour makes it possible to aggregate standalone PCs as computation resources into XtreemOS Grids. The XtreemOS cluster flavour is based on Kerrighed's LinuxSSI (single system image) technology. LinuxSSI is a Linux cluster providing users an image of a single large system. The third flavour, XtreemOS Mobile has been tailored to run XtreemOS services on mobile devices, such as Nokia Internet Tablets.


The 2.0 release version includes the following functionalities:


    Creation and management of dynamic virtual organizations The security infrastructure includes a set of services that guarantee the secure operation of the system, providing management of credentials, permissions and resources.


    Application execution management AEM is able to search available nodes that fulfill the application needs from within a large number of candidates and then execute the application on the selected nodes. AEM provides job and resource monitoring so that users can get a Linux-like view of their applications. A new experimental feature in this release is the ability to run interactive jobs such as graphical applications unmodified; harnessing the power of a Grid system. In addition, there is a new graphical tool for editing and managing job submissions. Lasty, grid checkpointing and job migration has been integrated into this version.


    XtreemFS is a replicated and distributed object-based file system. It allows scaling an installation by adding machines with free storage resources. It offers striping of files over multiple storage servers for high performance parallel access. Furthermore, it supports automated mounting of home volumes.


    XOSAGA programming interface The XOSAGA API is built using the Simple API for Grid Applications (SAGA) standard from the Open Grid Forum (OGF). It provides access to XtreemOS resources and services.


    Xosautoconfig is a new tool included in the distribution, which assists Grid administrators and other users to quickly deploy XtreemOS nodes on Virtual Machines, Grids and test beds.


With this release, the XtreemOS consortium invites the participation of external contributors and feedback. XtreemOS is open source and GPL/BSD licensed. For more info please email: There is a lively developer channel on #xtreemos-dev on, as well.


Getting XtreemOS

The second public version based on Mandriva Linux isos can be downloaded from the project website: software. The source code is available at Also available in the distribution are sample applications and demos.


About XtreemOS

Partially funded by the sixth framework programme (Contract FP6-033576) of the European Commission, XtreemOS is a 4-year research project, comprised of 19 academic and enterprise partners in Europe and China that aims to develop a Linux based grid operating system to simplify the usage, management and programming of grids.





XtreemOS 2.0 coming soon!

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After several months of hard work and testing the XtreemOS consortium is pleased to announce a release candidate of XtreemOS 2.0.

Among the many improvements:

  • New graphical tools to install and manage XtreemOS.

  • Interactive Job Sessions - Run unmodified graphical applications on a grid.

  • Enhanced job management with the ability to make resource reservations.

A final 2.0 release is expected soon in ISO and virtual machine formats.

XtreemOS 2.0 will inlcude new, advanced features and more differentiating factors than XtreemOS 1.0. It will also be significantly easier to install and configure.

Download for XtreemOS-RC5 and RC6 here:
The RC5 version for 64 bits and RC6 for 32 bit are identical in content.


Release 1.0 of XtreemFS

XtreemFS 1.0 is out. XtreemFS now supports read-only replication with failover, data center replica maps, parallel reads and writes, and a native Windows client, among other new features.

Download it at

Watch our demo of replication and failover on youtube!

We demonstrate the XtreemFS replication and failover with an unmodified MPlayer. We play a regular movie file stored on two XtreemFS OSDs.



Third project review meeting in Rennes (France)

The third project review meeting was held last July 8-9 in Rennes, France.

A delegation of XtremOS members gave presentations to allow the EC project officer and a reviewers' panel assessing the progress made by the consortium over the past year (June 2008- May 2009). The main technical and scientific achievements are the soon-to-be-publicly released second release of the XtreemOS system -including a graphical tool that makes the system easier to configure and install- and advanced features (integrated in XtreemOS v2.0).

The first demos of XtreemOS 2.0 were also run: a core scenario of the whole XtreemOS system and individual demos of stand-alone components (XtreemOS mobile device flavour, grid checkpointing/fault tolerance, virtual nodes...).

Review Meeting

This project review meeting was followed by a meeting of the Scientific Advisory Committee on July 9-10, 2009.

The XtremOS SAC is composed of experts from academic and industrial entities, both internal and external to the consortium, is a scientific evaluation consultative body.
It aims at maintaining the consortium at the forefront of knowledge worldwide and tackling specific technical difficulties.



XtreemOS-MD first release available!

The Mobile Device Flavor of XtreemOS (aka. XtreemOS-MD) has been recently released and it is available for downloading and testing from Mandriva repositories under the directory devel/xtreemos/2008.0/mobile.

The XtreemOS-MD software distribution is our first released implementation XtreemOS project for Mobile Devices, which integrates the Grid client functionality in Mobile Devices. The most important features are:

  • Grid available out of the box: the installation is as simple as a single click on a Web page and no user configuration is required, only your username and password for the Grid.
  • Grid login uses a plug-able, Single-Sign-On system. Login may be manual or automatic.
  • Automounting of the home Grid filesystem volume when user logs-in the Grid.
  • User may launch processes in the Grid.
  • User may run applications compliant with SAGA API (further work is needed for complete support)

XtreemOS-MD is currently available for two platforms:

  • Nokia N800 and Nokia 810 Internet Tablets running Maemo 2008 distribution.
  • Angstrom 2007.12 (currently, the last stable version until the date of publication of XtreemOS-MD, 2008/02/28) running in a Qemu emulator.

Installation is easier in Maemo 2008 (i.e. Nokia N8x0), because the platform provides the
functionality of "click to install" without needing to login as root in your mobile device. In Angstrom, installation requires to download and execute an installation script as root on top of a QEMU emulator.


XtreemOS source repository is now open!

The XtreemOS source repository is now open to public access.

You can access the sources of the latest development version using the web interface at the following address :

The sources can be downloaded using the command line svn client with the following command:
svn checkout svn://

XtreemOS is an open source project, released under BSD and GPL licenses (check the LICENSE file of each component for details). Developers interested in the project are encouraged to look at the source, and propose patchs, bugfix or ideas on the developers mailling list[1].



First public release: Download XtreemOS!

The XtreemOS European project is happy to announce the first public version of the XtreemOS Grid Operating System.

XtreemOS RC1 is the result of a combined 2 years-long effort by XtreemOS members from 19 academic and industrial partners.

The main features in this release are listed hereafter:

  •  Submit, check and control jobs,
  •  Distributed management of jobs: no global job scheduler,
  •  Complete file system functionality,
  •  Manage the Virtual Organizations' full lifecyle,

For installation instructions and more details on these features, click here where the release notes are available.

Your feed-back on this early version of the XtreemOS Grid OS will be highly appreciated.