SyncMode

String

JournalBlockWrite

Purpose

The SyncMode parameter specifies the write synchronization mode of journals from an SDS database server node to secondary databases, by determining how the secondary database is kept synchronized with the primary.

When the SyncMode parameter is set to the default JournalBlockWrite value and it is synchronized with the primary database, audit blocks are transferred and written to the secondary database journal at the same time they are written to the journal on the primary.

In effect, primary journal writes are mirrored to the secondary journal. These mirrored journal writes are asynchronous and the primary database does not wait for an acknowledgment that a write to disk has been completed at the secondary.

When the SyncMode parameter is set to JournalSwitch value, journal data is transferred to the secondary database when the journal is complete and writing switches to a new journal.

For details, see "Selecting the Journal Transfer Mode for a Secondary Database" under "Synchronizing with a Primary", in Chapter 1 of the JADE Synchronized Database Service (SDS) Administration Guide.

Parameter is read when …

The secondary to primary connection is next established; for example, you can disable the connection, change the parameter value, and then reconnect.

Applicable to database role…

Secondary.