The original Unix file system (UFS) implementation, also called the Berkley Fast File System or UFS1, originated in BSD UNIX. It later appeared in several commercial UNIX variations, including Solaris. The current Solaris UFS adds two major features not found in the original UFS: support for larger files and filesystems (up to 16 TB) and logging.
Logging here is again similar to the WAL database and the journaling used in Linux, and, like Linux's ext3 journal mode, there are known situations where having logging on turns out to be a performance improvement for UFS, because it turns what would otherwise be random writes into a series of sequential ones to the log. Logging is turned on by default on current Solaris releases; in ...
