Setting up an HP SIM server 6.0 or greater on a Linux-based Serviceguard Cluster White Paper 444847-004, February 2010

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# for the system resources available on your cluster nodes. Some

examples

# of system resources that can affect the optimum number of concurrent

# operations are: number of CPUs, amount of available memory, the

kernel

# configuration for nfile and nproc. In some cases, if you set the

number

# of concurrent operations too high, the package may not be able to

start

# or to halt. It is suggested th

at the number of concurrent operations

# tuned carefully, increasing the values a little at a time and

observing

# the effect on the performance, and the values should never be set to

# value where the performance levels off or declines. Additiona

lly,

the

# values used should take into account the node with the least

resources

# in the cluster, and how many other packages may be running on the

node.

# For instance, if you tune the concurrent operations for a package so

# that it provides optim

um performance for the package on a node while

# no other packages are running on that node, the package performance

# may be significantly reduced, or may even fail when other packages

are

# already running on that node.

# CONCURRENT FSCK OPERATIONS

Specify the number of concurrent fsck processes to allow during

package

# startup. Setting this value to an appropriate number may improve the

# performance while checking a large number of file systems in the

package.

# If the specified value is less tha

n 1, the script defaults it to 1

and

# proceeds with a warning message in the package control script

logfile.

# This parameter is ignored, if the underlying file system is Red Hat

GFS,

# since fsck operations will not be performed in case of GFS.

CONCU

RRENT_FSCK_OPERATIONS=1

# CONCURRENT MOUNT AND UMOUNT OPERATIONS

# Specify the number of concurrent mounts and umounts to allow during

# package startup or shutdown.

# Setting this value to an appropriate number may improve the

performance

# while mountin

g or un

mounting a large number of file systems in the

package.

# If the specified value is less than 1, the script defaults it to 1

and

# proceeds with a warning message in the package control script

logfile.

CONCURRENT_MOUNT_AND_UMOUNT_OPERATIONS=1

# IP

ADDRESSES

# Specify the IP and Subnet address pairs which are used by this

package.