User guide

3–InfiniBand
®
Cluster Setup and Administration
Performance Settings and Management Tips
IB0054606-02 A 3-39
Remove Unneeded Services
The cluster administrator can enhance application performance by minimizing the
set of system services running on the compute nodes. Since these are presumed
to be specialized computing appliances, they do not need many of the service
daemons normally running on a general Linux computer.
Following are several groups constituting a minimal necessary set of services.
These are all services controlled by
chkconfig. To see the list of services that are
enabled, use the command:
$ /sbin/chkconfig --list | grep -w on
Basic network services are:
 network
 ntpd
 syslog
 xinetd
 sshd
For system housekeeping, use:
 anacron
 atd
 crond
If you are using Network File System (NFS) or yellow pages (yp) passwords:
 rpcidmapd
 ypbind
 portmap

nfs
 nfslock
 autofs
To watch for disk problems, use:
 smartd
 readahead
The service comprising the ib_qib driver and SMA is:
 openibd