#include <db_cxx.h>

int DbMpoolFile::set_lsn_offset(int32_t lsn_offset); 

The DbMpoolFile::set_lsn_offset() method specifies the zero-based byte offset of a log sequence number (DbLsn) on the file's pages, for the purposes of page-flushing as part of transaction checkpoint. (See the DbEnv::memp_sync() documentation for more information.)

The DbMpoolFile::set_lsn_offset() method configures a file in the cache, not only operations performed using the specified DbMpoolFile handle.

The DbMpoolFile::set_lsn_offset() method may not be called after the DbMpoolFile::open() method is called. If the file is already open in the cache when DbMpoolFile::open() is called, the information specified to DbMpoolFile::set_lsn_offset() must be consistent with the existing file or an error will be returned.

The DbMpoolFile::set_lsn_offset() method either returns a non-zero error value or throws an exception that encapsulates a non-zero error value on failure, and returns 0 on success.