Initializing the DaCS daemons

The daemons can be stopped and started using the shell service command in the sbin directory. For example, to stop the host daemon type:

/sbin/service hdacsd stop

and to restart the host daemon type:

/sbin/service hdacsd start

The default configuration for the daemons will work in most situations. The configuration file contains the following options:

dacsd_receive_timeout

The default receive timeout in seconds. 0 (zero) means no timeout. For example, to set a timeout of 5 seconds use:

dacsd_receive_timeout=5

dacsd_kill_timeout

The default dacs_de_kill timeout; the number of seconds between sending SIGTERM and SIGKILL. 0 (zero) means that dacsd_he_terminate will send SIGKILL immediately, without sending SIGTERM. For example, to set a timeout of 5 seconds use:

dacsd_kill_timeout=5

blade_monitor_interval

The period in seconds between polling Cell Blades to track their availability. Setting this to 0 disables the Cell Blade monitor. For example, to set a period of 60 seconds use:

blade_monitor_interval=60

dacs_topology_config

The topology configuration file, for example:

dacs_topology_config=/etc/dacs_topology.config

ae_cwd_prefix

The AE Current Working Directory prefix. Each AE process started by dacs_de_start is given a temporary current working directory named <ae_cwd_prefix>/adacsd-tmp/<HE # Process Info>/<AE Process Info>. DaCS applications refer to this by $AE_CWD in the dacs_de_start program parameters and environment variables. When adacsd starts it will clear the directory <ae_cwd_prefix>/adacsd-tmp. When an AE process ends, adacsd will remove the directory <ae_cwd_prefix>/adacsd-tmp/<HE Process Info>/<AE Process Info>. When an HE process ends, adacsd will remove the directory <ae_cwd_prefix>/adacsd-tmp/<HE Process Info>. An example of this parameter is:

ae_cwd_prefix=/adacsd

ae_cwd_keep

The default for this is

ae_cwd_keep=false

which means the AE Current Working Directory and its contents are deleted when the AE process terminates. To prevent this use:

ae_cwd_keep=true

he_tar_command

dacs_de_start transfers files via tar. The tar commands are configurable to help with debugging, but should not normally be changed. Configuring these commands incorrectly will cause dacsd_he_xfer to fail. The default is:

he_tar_command="/bin/tar cf -"

An example of a debug setting is:

he_tar_command="/usr/bin/strace -o/tmp/he_tar_strace /bin/tar cvvf -"

ae_tar_command

See the he_tar_command. The default for this is:

ae_tar_command="/bin/tar xf -"

and an example is:

ae_tar_command="/usr/bin/strace -o/tmp/ae_tar_strace /bin/tar xvvf -"

adacsd_use_numa

This is a temporary workaround for problems with libnuma versions before 0.9.10. The default is:

adacsd_use_numa=true

To disable numa support use:

adacsd_use_numa=false

The default startup options are:

ADACSD_ARGS="--log /var/log/adacsd.log --pidfile /var/run/adacsd.pid"
HDACSD_ARGS="--log /var/log/hdacsd.log --pidfile /var/run/hdacsd.pid"