Berkeley DB

env txn

						env txn
						[-nosync]
						[-nowait]
						[-parent txnid]
						[-sync]
					

Description

The env txn command begins a transaction. The returned transaction handle is bound to a Tcl command of the form env.txnX, where X is an integer starting at 0 (for example, env0.txn0 and env0.txn1). It is through this Tcl command that the script accesses the transaction methods.

The options are as follows:

• -nosync Do not synchronously flush the log when this transaction commits or prepares. This means the transaction will exhibit the ACI (atomicity, consistency, and isolation) properties, but not D (durability); that is, database integrity will be maintained, but it is possible that this transaction may be undone during recovery instead of being redone.

  This behavior may ...