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[HDFS-6658] Namenode memory optimization - Block replicas list - HDFS - [issue]
...Part of the memory consumed by every BlockInfo object in the Namenode is a linked list of block references for every DatanodeStorageInfo (called "triplets"). We propose to change the way we ...
http://issues.apache.org/jira/browse/HDFS-6658    Author: Amir Langer, 2014-07-22, 09:57
[HDFS-6661] Use BlockList instead of double linked list  i.e BlockInfo triplets - HDFS - [issue]
...Replace the triplets data structure with a BlockList instance per DatanodeStorageInfo. This requires to keep only two integers per replica in any BlockInfo object. (One is the index for the ...
http://issues.apache.org/jira/browse/HDFS-6661    Author: Amir Langer, 2014-07-10, 16:20
[HDFS-6660] Use int instead of object reference to DatanodeStorageInfo in BlockInfo triplets, - HDFS - [issue]
...Map an int index to every DatanodeStorageInfo and use it instead of object reference in the BlockInfo triplets data structure....
http://issues.apache.org/jira/browse/HDFS-6660    Author: Amir Langer, 2014-07-10, 16:20
[HDFS-6659] Create a Block List - HDFS - [issue]
...BlockList - An efficient array based list that can extend its capacity with two main features:1. Gaps (result of remove operations) are managed internally without the need for extra memory -...
http://issues.apache.org/jira/browse/HDFS-6659    Author: Amir Langer, 2014-07-10, 16:19
[HDFS-6552] add DN storage to a BlockInfo will not replace the different storage from same DN - HDFS - [issue]
...In BlockInfo - addStorage code looks wrong.At line 10 (below) - we remove the storage we're about to add from the list of storages, then add it. If the aim was to replace the different stora...
http://issues.apache.org/jira/browse/HDFS-6552    Author: Amir Langer, 2014-06-19, 16:17
[HDFS-5732] Separate memory space between BM and NN - HDFS - [issue]
...Change created APIs to not rely on the same instance being shared in both BM and NN. Use immutable objects / keep state in sync.BM and NN will still exist in the same VM work on a new BM ser...
http://issues.apache.org/jira/browse/HDFS-5732    Author: Amir Langer, 2014-03-11, 22:41
[HDFS-5731] Refactoring to define interfaces between BM and NN and simplify the flow between them - HDFS - [issue]
...Start the separation of BlockManager (BM) from NameNode (NN) by simplifying the flow between the two components and defining API interfaces between them. This is done to enable future transf...
http://issues.apache.org/jira/browse/HDFS-5731    Author: Amir Langer, 2014-02-04, 19:32
[HDFS-5734] A NN-internal RPC BM service - HDFS - [issue]
...Separate the BM from NN by running it with with its own thread-pool and RPC protocol but still in the same process as NN.NN and BM will in interact through some loopback call that will simul...
http://issues.apache.org/jira/browse/HDFS-5734    Author: Amir Langer, 2014-01-09, 05:40
[HDFS-5736] BM service as a separate process - HDFS - [issue]
...Add scripts / config. to allow running BM as a separate service....
http://issues.apache.org/jira/browse/HDFS-5736    Author: Amir Langer, 2014-01-08, 14:19
[HDFS-5735] Testing support for BM as a service - HDFS - [issue]
...Testing support for an independent BM service. Modify tests to start it / use MiniDFSCluster if they require a BM. Verify that all tests still pass with an independent BM (running off MiniDF...
http://issues.apache.org/jira/browse/HDFS-5735    Author: Amir Langer, 2014-01-08, 14:18
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