Platform LSF Administration Guide Version 6.2

Welcome
Administering Platform LSF
27
Reliability and
usability
◆ Pending job management—limits the number of pending jobs by setting cluster
wide, user level and user group level settings. This prevents the overloading of the
cluster.
◆ Use the -oo and -oe options of bsub and bmod to overwrite the LSF output and
error files if they already exist. The original behavior of appending to the output and
error files is still available with the
-o and -e options.
◆ Administrator control over whether users can use btop and bbot to move jobs to
the top and bottom of queues. When
JOB_POSITION_CONTROL_BY_ADMIN = Y in
lsb.params, only LSF
administrators (including any queue administrators) can use
bbot and btop to
move jobs within a queue. A user attempting to use
bbot or btop receives the error
message
User permission denied.
◆ Using host name ranges as aliases—the default host file syntax
ip_address official_name [alias [alias ...]]
is powerful and flexible, but it is difficult to configure in systems where a single host
name has many aliases, and in multihomed host environments.
In these cases, the
hosts file can become very large and unmanageable, and
configuration is prone to error.
The syntax of the LSF
hosts file supports host name ranges as aliases for an IP
address. This simplifies the host name alias specification.
To use host name ranges as aliases, the host names must consist of a fixed node
group name prefix and node indices, specified in a form like:
host_name[index_x-index_y, index_m, index_a-index_b]
For example:
atlasD0[0-3,4,5-6, ...]
is equivalent to:
atlasD0[0-6, ...]
Platform LSF License Scheduler
Failover
provisioning in
LANs and WANs
You can configure LSF License Scheduler for enhanced performance, easy organization,
and reliable license distribution.
You need only one host to run the LSF License Scheduler but you can configure your
site for a failover mechanism where multiple candidate hosts can take over the
scheduling in case of a failure. This configuration can be used in a local network (LAN)
or across multiple sites in a wide-area network (WAN).
License scheduling across sites can be streamlined because LSF License Scheduler
supports service provisioning during breaks in wide area network connections. This
allows you to run LSF License Scheduler from one host that controls license scheduling
across multiple sites.