TMF Application Programmer's Guide (G06.26+)

Designing Single-Threaded Processes

HP NonStop TMF Application Programmer’s Guide—522419-005

2-9

Checkpointing Strategy

Figure 2-1. Checkpointing Within Single-threaded Requesters

VST001.vsd

Has final

WRITEREAD been

issued?

Specify the

TFILE.

Yes

Failure #1

Failure #2

Failure #3

Call CHECKPOINT.

Call

BEGINTRANSACTION.

Issue WRITEREAD

call to server.

Call CHECKPOINT.

Call

ENDTRANSACTION.

Issue READ to get

terminal input.

Set up local storage with

all the application data

necessary to start the

transaction.

Specify both the

application data

necessary to start

the transaction and

the TFILE.