The OpenSSI project is a comprehensive clustering
solution offering a full, highly available SSI
environment for Linux. Goals for OpenSSI Clusters
include availability, scalability and
manageability, built from standard servers.
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A bug that prevented clusters larger than 32 nodes has been
fixed. Processes with open /proc files can migrate. The CVIP
can be identical to a physical IP address. Hostnames in /etc/
cvip.conf are allowed. CFS can stack on ramfs. Some
documentation has been improved, covering topics such as
NFS, LTSP, and NTP.
OpenSSI 1.2.0 is a stable release, suitable for
production use. New features include several CFS
performance enhancements and the integration of
LVS-NAT. POSIX process groups and multi-threaded
applications can atomically migrate as a group.
Also, processes can migrate while holding file
record locks. When clusternode_shutdown is done,
loadleveled processes are automatically migrated
away. The top command was enhanced to display
execution node numbers, to allow filtering by node
number, and to have a localview mode. There have
also been many bugfixes.
This version is primarily a bugfix release. The top command
was enhanced to display execution node numbers by default,
as well as to have a localview mode. The ps --shownode and
--node enhancements are working again. The init failover
state file was moved to improve performance.
This is a development release, and is not necessarily suitable
for production use. It has versions for Fedora Core 2 and Debian.
New features include several CFS performance enhancements and the
integration of LVS-NAT. POSIX process groups and multi-threaded
applications can now atomically migrate as groups. Also, processes can
migrate while holding file record locks. New commands include "fast" and
"fastnode". Several files have been added to /proc/cluster for dynamic
modification of nodedown detection parameters. Finally, a variety of
bugs have been fixed.
This release is mostly unchanged from the
1.0.0-rc6 release, apart from a few minor bug
fixes. A bug involving SEM_UNDO and nodedown was
fixed. The process loadleveling algorithm better
handles different numbers of CPUs on each node.
File locking with fcntl now works for O_LARGEFILE
files. The mklocalfile command now sets the
correct owner/group on the CDSLs that it creates.
