Data Storage - The Buffer Cache (File System Cache)

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All data accessed from files on the system that are performed through the use of read() and write() system calls, pass through the file system buffer cache.

This buffer cache greatly speeds up disk access because recently accessed files can be served quickly from this RAM based cache, instead of reading then from or writing them to the physical hard disk.

This cache is shared between all of the physical block devices.

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Oracle Database - Redo Log (Transaction Log Files)

transaction log in Oracle are knwon as the redo log. Every instance of an Oracle Database has an associated redo log to protect the database in case of an instance failure. To protect against a failure...

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