TS/MP Release Supplement

Introduction to TS/MP 2.4
HP NonStop TS/MP Release Supplement—546055-006
3-2
Synchronous Upgrade
class attributes. After a successful ALTER, the ACS subsystem queues all new
Pathsend requests to this server class.
3. The FREEZE command is issued on all other PATHMONs and the altered server is
THAWed. The ACS subsystem starts processing new requests that are queued.
Because only the upgraded server is in THAW state and others servers are frozen,
all requests go to the upgraded server.
4. The remaining servers in other PATHMONs are stopped, altered, thawed, and
started.
ALTER-DOMAIN is a non-atomic command. Any failure during processing must be
manually recovered.
If commands are issued from PATHCOM for the servers being upgraded when an
ALTER-DOMAIN is in progress, the results are unpredictable. You are recommended
not to use PATHCOM for operation and management of PATHMONs, which are part of
domains.
When ACS subsystem is not running:
•
ALTER-DOMAIN command is rejected.
•
PATHCOM commands issued from PDMCOM are processed with a warning
message.
For more information on ALTER-DOMAIN command, see ALTER-DOMAIN Command
on page 4-5.
Synchronous Upgrade
TS/MP 2.4 supports online upgrade of SCOBOL applications synchronized with online
upgrade of server class applications. This feature is useful when SCOBOL applications
and the corresponding server classes must be upgraded simultaneously.
See the synchronous upgrade in the
HP NonStop Pathway/iTS System Management
Manual
.
Large Message Support
TS/MP 2.4 supports data transmission of up to 2 MB for context free Pathsend
requests. A new Pathsend API, SERVERCLASS_SENDL_, allows sending and
receiving messages of up to 2 MB. See the SERVERCLASS_SENDL_ procedure in
the
HP NonStop TS/MP Pathsend and Server Programming Manual.
The following file system APIs support 2 MB messages:
•
AWAITIOXL
•
CANCELREQL