The transaction log file can be a raw device rather than an ordinary file system file. A raw device is a disk partition without a file system. This avoids file system overhead for disk input and output. Ingres supports use of a raw device for the transaction log files as a high‑performance option.

By default the install process creates the log file as an ordinary file. After Ingres is installed, you can create and configure the transaction log file as a raw device.