Compaq AA-Q88CE-TE Server States, Server Shadowing and Recovery Application Considerations, CHAN2

Server Shadowing and Recovery

B.8 Application Considerations

•Any physical reference to the transaction which is unique to the executing server, e.g. Channel Id, system time, DB-key, etc., should not be passed back to the client for future references within its subsequent messages, as this could lead to inconsistent handling when a different server is involved in shadow operations.

This consideration is also valid for recovery of non-shadowed servers.

B.9 Server States

The current state of a server can be examined as follows:

RTR> show server/full

Servers:

Process-id:	13340	Facility:	RTR$DEFAULT_FACILITY
Channel:	131073	Flags:	SRV
State:	active	Low Bound:
High Bound:	87 13	rcpnam:	"RTR$DEFAULT_CHANNEL"
User Events:	0	RTR Events:	0
Partition-Id:	16777216
Process-id:	13340	Facility:	RTR$DEFAULT_FACILITY
Channel:	196610	Flags:	SRV
State:	active	Low Bound:	88 13
High Bound:	0f'	rcpnam:	"CHAN2"
User Events:	0	RTR Events:	0
Partition-Id:	16777217

Figure B–2 gives an overview of the server state changes which appear in the "State:" field

B–6Server Shadowing and Recovery