TMF Operations and Recovery Guide (G06.24+)

Routine Maintenance

HP NonStop TMF Operations and Recovery Guide—522417-002

2-17

Understanding Transaction States

TMF transactions can be in various states of operation, which are shown in the

STATUS TRANSACTIONS command display. Table 2-4 describes transaction states.

Verifying that New Transactions Can Start

If there is a problem with transactions starting, you usually discover it by monitoring the

EMS log or the STATUS TMF display: that display provides a global view of TMF.

You can also use the STATUS BEGINTRANS command to make sure that transactions

are able to start on the system; this command displays the status of the

BEGINTRANSACTION object. Under normal operation, BEGINTRANSACTION is

State The operational state of the transaction, as described in the following

section.

Parent The name of the system that sends a distributed transaction to another node

to perform work on it.

Children The names of any systems that receive and perform work on behalf of a

distributed transaction. During the course of a transaction, the child node

may send the transaction to yet another node. The original child node is now

also a parent node.

Table 2-4. Transaction States

State Meaning

Aborted The transaction has been backed out, either as a result of an ABORT

TRANSACTION command, or automatically by the TMF autoabort

function. (See Changing the Autoabort Configuration

on page 3-18 for

information on the autoabort function.) Locks held by the transaction are

being released. The transaction stays in this state until all nodes affected

by the transaction have been informed of the backout.

Aborting The transaction is being backed out.

Active The transaction is in progress.

Committed The transaction has completed, and locks held by the transaction are

being released. The transaction stays in this state until all nodes

affected by the transaction have been informed of the committed

changes.

Hung The transaction is aborting, but the backout process has failed to undo

the transaction. See Controlling Individual Transactions

on page 3-20

for information on handling a hung transaction.

Prepared The child node is waiting for the parent node to send the result of the

transaction: that is, whether the transaction was committed or backed

out.

Table 2-3. Understanding the STATUS TRANSACTIONS Display

Heading Meaning