[Discover] Google Research Publication: Chubby Distributed Lock Service http://labs.google.com/papers/chubby.html
(google locking architecture cluster) 
[Discover] Locks and Consistency http://swig.stanford.edu/pub/summaries/database/locks.html (locking)
[Discover] Data Concurrency and Consistency http://download.oracle.com/docs/cd/B14117_01/server.101/b10743/consist.htm (locking concurrency)
[Discover] As I May Think...: Google Lock Secrets Unlocked: Chubby unveiled... http://www.wyman.us/main/2006/09/google_secrets_.html (google architecture locking chubby)
[Discover] DistributedLockServer - Lucene-hadoop Wiki http://wiki.apache.org/lucene-hadoop/DistributedLockServer (lock hadoop service hbase)
[Discover] Paxos algorithm - Wikipedia, the free encyclopedia http://en.wikipedia.org/wiki/Paxos_algorithm (algorithm algorithms clustering paxos)
[Discover] The "Double-Checked Locking is Broken" Declaration http://www.cs.umd.edu/~pugh/java/memoryModel/DoubleCheckedLocking.html (java locking programming multithreading)
[Discover] Locks and Consistency http://swig.stanford.edu/pub/summaries/database/locks.html (locking)
[Discover] Data Concurrency and Consistency http://download.oracle.com/docs/cd/B14117_01/server.101/b10743/consist.htm (locking concurrency)
[Discover] As I May Think...: Google Lock Secrets Unlocked: Chubby unveiled... http://www.wyman.us/main/2006/09/google_secrets_.html (google architecture locking chubby)
[Discover] DistributedLockServer - Lucene-hadoop Wiki http://wiki.apache.org/lucene-hadoop/DistributedLockServer (lock hadoop service hbase)
[Discover] Paxos algorithm - Wikipedia, the free encyclopedia http://en.wikipedia.org/wiki/Paxos_algorithm (algorithm algorithms clustering paxos)
[Discover] The "Double-Checked Locking is Broken" Declaration http://www.cs.umd.edu/~pugh/java/memoryModel/DoubleCheckedLocking.html (java locking programming multithreading)