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From "Benoit Perroud (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (DIRECTMEMORY-53) MemoryMamagerService buffers allocation policy
Date Sun, 01 Jan 2012 15:09:30 GMT
MemoryMamagerService buffers allocation policy
----------------------------------------------

                 Key: DIRECTMEMORY-53
                 URL: https://issues.apache.org/jira/browse/DIRECTMEMORY-53
             Project: Apache DirectMemory
          Issue Type: Improvement
            Reporter: Benoit Perroud
            Priority: Minor


MemoryMamagerService with multiple buffers has a really simple, even buggy allocation policy
: once a allocation fail (return null), we try the next buffer. If the allocation fails a
second time, we return a failure (a null Pointer) to the caller. 
If all the previous buffer were full at one point, we stick to the last buffer, without any
chance to try to allocate into a previous different buffer (which could have again free space
due to expiration or pointer freeing).

My idea here is to first correct this behavior, but then enhance the fonctionality by providing
configurable buffer allocation policy. For example : 
- round robin allocation, with a certain amount of retries (this would also relax some concurrency
contention)
- allocate into the buffer with the more free space
- allocate into the less fragmented buffer
- random
- ...

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