You can tweak OpenDJ to speed up import of large LDIF files.
By default, the temporary directory used for scratch files is
import-tmp under the directory where you installed
OpenDJ. Use import-ldif with the
--tmpdirectory option to set this directory to a
tmpfs file system, such as
/tmp.
In some cases, you can improve performance by using the
--threadCount option with the
import-ldif command to set the thread count larger than
the default, which is twice the number of CPUs.
If you are certain your LDIF contains only valid entries with
correct syntax, because the LDIF was exported from OpenDJ with all checks
active for example, you can skip schema and DN validation. Use the
--skipSchemaValidation and
--skipDNValidation options with the
import-ldif command to skip validation.
