Log-structured file system: Difference between revisions

Revision as of 19:25, 13 September 2007

Revision as of 21:55, 29 September 2007

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== Disadvantages ==

* The design rationale for log-structured file systems assumes that most reads will be optimized away by ever-enlarging memory caches. This assumption is not true for all workloads: on magnetic media (where seeks are relatively expensive) the log structure may actually make reads much slower, since it [[fragmentation (computer)#External_fragmentation|fragments]] files that conventional file systems normally keep contiguous with in-place writes. (However, these mechanical seek limitations do not apply to flash memory.)

* These mechanical seek limitations obviously do not apply to flash memory.

== References ==