A big, fast and persistent queue based on memory mapped file.
 
Features include: 
<ol>
<li>Fast: close to the speed of direct memory access, both enqueue and dequeue are close to O(1) memory access.</li>
<li>Big: the total size of the queue is only limited by the available disk space.</li>
<li>Persistent: all data in the queue is persisted on disk, and is crash resistant.</li>
<li>Reliable: OS will be responsible to presist the produced messages even your process crashes.</li>
<li>Realtime: messages produced by producer threads will be immediately visible to consumer threads.</li>
<li>Memory-efficient: automatic paging &amp; swapping algorithm, only most-recently accessed data is kept in memory.</li>
<li>Thread-safe: multiple threads can concurrently enqueue and dequeue without data corruption.</li>
<li>Simple&amp;Light-weight: current number of source files is 12 and the library jar is less than 30K.</li>
</ol>

A big, fast and persistent queue based on memory mapped file.

Big Queue - A big, fast and persistent queue based on memory mapped file.

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