The glossary below contains many of the terms you will find in common use throughout the Symantec Security Response website. Please refer to this list to find definitions of terms and answers to other Internet security-related questions.

unbuffered I/O

I/O that bypasses the file system cache for the purpose of increasing I/O performance (also known as direct I/O).

I/O that bypasses the kernel cache to increase I/O performance. This is similar to direct I/O, except when a file is extended; for direct I/O, the inode is written to disk synchronously, for unbuffered I/O, the inode update is delayed.

See buffered I/O and direct I/O.