RDF System Management Manual for H-Series RVUs (RDF 1.8)

transaction is in progress, the RDF gateway merely queues the request. Consequently, if an
application process issues a DoLockstep request immediately after the gateway has started a
lockstep transaction, that request must wait to be performed until the current lockstep transaction
is committed on the backup system. That could also increase response times.
Lockstep and Auxiliary Audit Trails
You cannot use lockstep processing in an RDF subsystem that is protecting auxiliary audit trails.
Lockstep and Network Transactions
You cannot use lockstep to protect data associated with network transactions because the lockstep
protocol only pertains to operations on a single system. If lockstep is used with network
transactions, consistency between lockstep operations and the distributed application database
files cannot be guaranteed after an RDF takeover.
For a description of lockstep operation event messages, see “Lockstep Gateway Event Messages”
(page 335)
294 Process-Lockstep Operation