[ogfs-dev][ANNOUNCE] OpenSSI 1.0.0 released!!

["Aneesh Kumar K.V" <aneesh.kumar@xxxxxx>]

Hi,

Sorry for the cross post. I came across this on OpenSSI website. I guess 
others may also be interested.

-aneesh

The OpenSSI project leverages both HP's NonStop Clusters for Unixware 
technology and other open source technology to provide a full, highly 
available Single System Image environment for Linux.

Feature list:
1.  Cluster Membership
  * includes libcluster  that application can use
2. Internode Communication

3. Filesystem
   * support for CFS over ext3,  Lustre Lite
   * CFS can be used for the root
   * reopen of files, devices, ipc objects when processes move is supported
   * CFS supports file record locking and shared writable mapped files 
(along with all other standard POSIX capabilities
   * HA-CFS is configurable for the root or other filesystems
4. Process Management
    * almost all pieces there, including:
          o clusterwide PIDs
          o process migration and distributed rexec(), rfork() and 
migrate() with reopen of files, sockets, pipes, devices, etc.
          o vprocs
          o clusterwide signalling, get/setpriority
          o capabilities
          o distributed process groups, session, controlling terminal
          o surrogate origin functionality
          o no single points of failure (cleanup code to deal with 
nodedowns)
          o Mosix load leveler (with the process migration model from NSC)
          o clusterwide ptrace() and strace
          o clusterwide /proc/<pid>, ps, top, etc.

5. Devices
  * there is a clusterwide device model via the devfs code
  * each node mounts its devfs on /cluster/node#/dev and bind mounts it 
to /dev so all devices are visible and accessible from all nodes, but by 
default you see only local devices
  * a process on any node can open a device on any node
  * devices are reopened when processes move
  * processes retain a context, even if they move; the context 
determines which node's devices to access by defaul
6. IPC
  * all IPC objects/mechanisms are clusterwide:
         o pipes
         o fifos
         o signalling
         o message queues
         o semaphore
         o shared memory
         o Unix-domain sockets
         o Internet-domain sockets
 * reopen of IPC objects is there for process movement
 * nodedown handling is there for all IPC objects
7. Clusterwide TCP/IP
  * HA-LVS is integrated, with extensions
  * extension is that port redirection to servers in the cluster is 
automatic and doesn't have to be managed.
8. Kernel Data Replication Service
  * it is in there (cluster/ssi/clreg)
9. Shared Storage
  * we have tested shared FCAL and use it for HA-CFS
10. DLM
  * is integrated with CLMS and is HA
11. Sysadmin
  * services architecture has been made clusterwide
12. Init, Booting and Run Levels
  * system runs with a single init which will failover/restart on 
another node if the node it is on dies
13. Application Availability
 * application monitoring/restart provided by spawndaemon/keepalive
 * services started by RC on the initnode will automatically restart on 
a failure of the initnode
14. Timesync
 * NTP for now
15. Load Leveling
 * adapted the openMosix algorithm
 * for connection load balancing, using HA-LVS
 * load leveling is on by default
 * applications must be registered to load level
16. Packaging/Install
  * Have source patch, binary RPMs and CVS source options;
  *  Debian packages also available via ap-get repository.
  * First node is incremental to a standard Linux install
  * Other nodes install via netboot, PXEboot, DHCP and simple addnode 
command;
17. Object Interfaces
  * standard interfaces for objects work as expected
  * no new interfaces for object location or movement except for 
processes (rexec(), migrate(), and /proc/pid/goto to move a process)



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