|From:||"Aneesh Kumar K.V" <email@example.com>|
|To:||Linux Kernel Mailing List <firstname.lastname@example.org>, email@example.com, firstname.lastname@example.org, email@example.com, firstname.lastname@example.org|
|Subject:||[ANNOUNCE] OpenSSI 1.0.0 released!!|
|Date:||Sat, 31 Jul 2004 16:51:32 +0530|
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) - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to email@example.com More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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