Specifications

Communication Status Information
l these resources are dependent.If present, indicates the tag names of all parent resources
that are directly dependent on this object.
l Local priority. Indicates the failover priority value of the targeted server, for this resource.
l SHARED equivalency. Indicates the resource tag and server name of any remote resources
with which this resource has a defined equivalency, along with the failover priority value of the
remote server, for that resource.
l FAILOVER ALLOWED. If present, indicates that LifeKeeper is operational on the remote
server identified in the equivalency on the line above, and the application is protected against
failure. FAILOVER INHIBITED means that the application is not protected due to either the
shutting down of LifeKeeper or the stopping of the remote server.
Communication Status Information
This section of the status display lists the servers known to LifeKeeper and their current state,
followed by information about each communications path.
These are the communications information elements you can see on the status display:
l State. Status of communications path. These are the possible communications state values:
l ALIVE. Functioning normally
l DEAD. No longer functioning normally
l priority. The assigned priority value for the communications path.This item is displayed only
for TCP paths.
l #comm_downs. The number of times the port has failed and caused a failover. The path
failure causes a failover only if no other communications paths are marked "ALIVE" at the time
of the failure.
In addition, the status display can provide any of the following statistics maintained only for TTY
communications paths:
l
wrpid. Each TTY communications path has unique reader and writer processes. The wrpid
field contains the process ID for the writer process. The writer process sleeps until one of two
conditions occurs:
l Heartbeat timer expires, causing the writer process to send a message.
l Local process requests the writer process to transmit a LifeKeeper maintenance
message to the other server. The writer process transmits the message, using its
associated TTY port, to the reader process on that port on the other system.
l
rdpid. Each TTY communications path has unique reader and writer processes. The rdpid
field contains the process ID for the reader process. The reader process sleeps until one of
two conditions occurs:
l Heartbeat timer expires and the reader process must determine whether the predefined
heartbeat intervals have expired. If so, the reader process marks the communications
52SteelEye LifeKeeper for Linux