Pathway/XM System Management Manual

PXMCFG Statements and PXMCHK Utility
Compaq NonStop™ Pathway/XM System Management Manual—426761-001
10-59
SET SERVER
performs checkpoint operations, but does not automatically retry I/O errors; this is
done by the operating system.
TYPE { DISTRIBUTED | REPLICATED | DIRECT }
specifies the way the server processes in the server class are managed.
If this attribute is omitted, the default is DISTRIBUTED.
VOLUME volume-spec
specifies the server class default volume and subvolume names to be passed to the
server process in the startup message. This value is also used by the PATHMON
process for the VOLUME attribute of _DEFAULTS DEFINE.
Defaults for file name expansion are based on the value of the DEFAULT attribute
of the associated NODE object.
Considerations
•
If you repeat a SET SERVER statement with a different attribute value, the
PATHMON process uses the last value entered for the server class attribute.
•
If you specify a value for the TIMEOUT attribute and an I/O to a server process
times out because of the TIMEOUT value, the link management process cancels the
I/O to the server and returns the link. If the link was the last link to the server, the
server stops.
•
If you specify a value for the TIMEOUT attribute, it should be a value large enough
to accommodate suspended servers without timing out.
DISTRIBUTED Server processes in this server class are accessed through an
LCS process (executing as a PATHMON server) which
provides load-balancing for server processes across CPUs,
This server class type permits on-line server replacement and
takes full advantage of Pathway/XM load-balancing features.
REPLICATED Each server class is managed by its local PATHMON process;
server processes in this server class are accessed directly by a
TCP or LINKMON process. Each PATHMON process in a
multiple-PATHMON environment manages a replicated copy
of the server class.
This server class type supports static load balancing only.
DIRECT The server class is managed only through the well-known
named PATHMON process; server processes in this server
class are accessed directly by a TCP or LINKMON process.
Other PATHMON processes in the Pathway/XM environment
if any, handle this server class as an associative server class.
This server class type does not support load balancing; it is the
most restrictive server type.