Enclose the open call within a transaction. If the call succeeds, the open operation will be recoverable and all subsequent database modification operations based on this handle will be transactionally protected. If the call fails, no database will have been created.

The byte order for integers in the stored database metadata. The host byte order of the machine where the Berkeley DB library was compiled is the default value.

The size of the shared memory buffer pool -- that is, the cache.

The Btree key comparison function.

The policy for how to handle database creation.

If true, do checksum verification of pages read into the cache from the backing filestore.

The duplicate data item comparison function.

Policy for duplicate data items in the database; that is, insertion when the key of the key/data pair being inserted already exists in the database will be successful.

The Berkeley DB environment within which to create a database. If null, the database will be created stand-alone; that is, it is not part of any Berkeley DB environment.

The mechanism for reporting error messages to the application.

The prefix string that appears before error messages issued by Berkeley DB.

Cause the database object to be free-threaded; that is, concurrently usable by multiple threads in the address space.

If true, the secondary key is immutable.

Do not map this database into process memory.

If true, Berkeley DB will not write log records for this database.

Turn reverse splitting in the Btree on or off.

If true and the secondary database is empty, walk through Primary and create an index to it in the empty secondary. This operation is potentially very expensive.

The Btree prefix function.

The cache priority for pages referenced by the database.

Open the database for reading only. Any attempt to modify items in the database will fail, regardless of the actual permissions of any underlying files.

Support transactional read operations with degree 1 isolation.

Physically truncate the underlying file, discarding all previous databases it might have held.

Open the database with support for multiversion concurrency control.

If true, support retrieval from the Btree using record numbers.