3.7.0 HP StorageWorks HP Scalable NAS File Serving Software administration guide - HP Scalable NAS 3.7 for Linux (AG513-96002, October 2009)

Following are some of the daemons provided with HP Scalable NAS:
ClusterPulse. Monitors the cluster, controls failover of virtual hosts and devices, handles
communications with the Management Console, and manages device monitors,
service monitors, and event notification.
Distributed Lock Manager (DLM). Provides a locking mechanism to coordinate server
access to shared resources in the cluster. All reads and writes to a PSFS filesystem
automatically obtain the appropriate locks from the DLM, ensuring filesystem
coherency.
grpcommd. Manages HP Scalable NAS group communications across the cluster.
mxds. Manages the mxds datastore.
mxinit. Starts or stops HP Scalable NAS and monitors HP Scalable NAS processes.
mxlogd. Manages global error and event messages. The messages are written to
the event log on each server.
PanPulse. Selects and monitors the network to be used for the administrative network,
verifies that all hosts in the cluster can communicate with each other, and detects any
communication problems.
pswebsvr. The embedded web server daemon used by the Management Console
and the mx utility.
SANPulse. Provides the cluster infrastructure for management of the SAN. SANPulse
coordinates filesystem mounts, unmounts, and crash recovery operations.
SCL. Manages shared storage devices. The SCL has two primary responsibilities:
assigning device names to shared disks when they are imported into the cluster, and
enabling or disabling a server’s access to shared storage devices.
SDMP. Arbitrates and ensures that only one cluster has access to shared SAN devices.
If a problem causes a cluster to split into two or more network partitions, the SDMP
process protects filesystem integrity by ensuring that only one of the network partitions
has access to the SAN.
HP Scalable NAS includes the following drivers:
psd. Provides cluster-wide consistent device names among all servers.
psv. Used by the Cluster Volume Manager, which creates, extends, recreates, or
destroys dynamic volumes.
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