Sometimes you need to keep OpenVMS hosts from overloading a SAN storage controller fibre channel port. The SANCP utility, new in V8.3, allows you to limit the number of I/O requests “in flight” to that fibre channel port on the SAN storage controller. This is often needed in “Tier 1″ storage environments, which share resources across numerous hosts. The SANCP utility allows you to set the WTID cap. That acronymn stands for the World-wide id Thottle I/o Descriptor.
|
HP OpenVMS Version 8.3 New Features and
Documentation Overview
|
|
The SANCP utility allows you to limit the number of active I/Os a host
may have across all paths to Logical Unit Numbers (LUN) on a given
Fibre Channel storage port. A storage port can be selected by a
discrete or wildcarded port World Wide ID (WWID) or by a product ID
substring.
|
The SANCP utility processes a command and qualifiers passed to it on
the command line, allowing it to be executed from a DCL script, or it
prompts you if started with no command. For more information about the
SANCP utility, see the SANCP Help facility. |
|
|
(1 votes, average: 4.00 out of 5)
Loading ...
