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storage FAQ; integrated some comments from kyle #31

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May 21, 2012
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storage FAQ; integrated some comments from kyle #31

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integrated some comments from kyle
barriesegal May 21, 2012
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minor: changed formatting
barriesegal May 21, 2012
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13 changes: 7 additions & 6 deletions source/faq/storage.txt
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Expand Up @@ -18,12 +18,13 @@ the :doc:`complete list of FAQs </faq>` or post your question to the
What are memory mapped files?
-----------------------------

Memory mapped files are a way of keeping files and data
up to date in memory using the system call ``mmap()``. MongoDB uses
memory mapped files as its storage engine. By using memory mapped
files MongoDB can treat the content of its data files as if they were
in memory. This provides MongoDB with an extremely fast and simple
method for accessing and manipulating data.

A memory-mapped file is a file whose data has been mapped to a region of
virtual memory via the ``mmap()`` system call. Memory-mapped files play a
critical role in the MongoDB storage engine. By using memory mapped files
MongoDB can treat the content of its data files as if they were in memory.
This provides MongoDB with an extremely fast and simple method for accessing
and manipulating data.

How do memory mapped files work?
--------------------------------
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