z/OS V1R9.0 UNIX System Services Command ... - Christian Grothoff

configstk
Examples
number specified is be distributed equally among the read and write
flows. As new ESCON ®
fibers are added to the configuration,
additional IO buffers are required. Thruput decreases and overhead
increases if the number specified is too restrictive. You should
initially specify a value of 10 times the number of defined gateways
for low-to-average use and increase it proportionally as the number
of users increase). The maximum number of buffers allocated is the
larger of six times the number of active gateways, or the number
specified. A decrease in the number is not honored until the next
IPL.
blocking
Indicates whether the internal blocking algorithm should be
activated for outgoing packets. The default is BLOCKING.
Specifying NOBLOCKING causes the internal optimization routines,
which attempt to group multiple packets into a single blocked I/O, to
be bypassed (such as single packet per block written on demand).
Specifying BLOCKING minimizes the z/OS overhead and
maximizes the ESCON channel bandwidth, but can delay the
packet delivery slightly.
GATEWAY device_number checksum
At least one of these statements is required and up to 32 can be specified.
The entire statement must be on a single line. This statement maps the
target RS/6K IP addresses to the gateway that will process the request. The
device number to define the gateway must be the first of an even-odd pair
of subchannels (both configured thru a single ESCON fiber) between the
z/OS image and the RS/6K gateway. Multiple target IP addresses can be
mapped to a given gateway. A given target IP address can be mapped to at
most one gateway.
device_number
Specifies the hex address of device to be configured. This number
must be four hex digits and must be an even number.
checksum
Indicates whether a reliable communications path exists between
the communicating applications. Specify CHECKSUM if any portion
of the path between the communicating applications is unreliable
(such as a LAN). Specify NOCHECKSUM if the entire path is
reliable (such as a SP2 ®
fast switch or ESCON).
A list of IP addresses immediately follows this statement, one IP address
per line. At least one IP address must be specified for each gateway
device. Up to 256 IP addresses can be specified in the configuration file.
Blank lines are permitted and lines beginning with /* are treated as
comments.
/* configure AF_UEINT sockets
/* name the ip address for this node, default to blocking enabled
home 10.32.166.20 buffers(20)
/* configure device 324
gateway 0324 nochecksum
10.34.166.20
10.34.166.24
10.34.166.26
148 z/OS V1R9.0 UNIX System Services Command Reference