BerkeleyDDB

Using BerkeleyDB to make a distributed database.

Features:

• Consistent hashing to balance load across Workers
• Server pushed client-side look ups similar to Google BigTable and EdgeBase
• Table support
• Client side caching

Running Instructions

Make sure you have access to /tmp/ directory of your machine.

To compile and run the software:

1. Run compile.sh script. (Do it on each host if using multiple hosts)
2. Go to the directory /tmp/berkeleydb/
3. On the master host, run runServer.sh script.
4. On each worker host, run runWorker.sh <Database_Name> <IP_of_Master>.

• It is normal to see an exception about the already used port for rmi registry if more than one workers or the master is running on the same machine. However if the exception does not allow the program to start, please run killrmis.sh script and try the step 4 again.If this doesn't work either, run ps aux | grep rmiregistry and kill -9 the process.

5. On each client, run runClient.sh <IP_of_Master>.
6. Have fun!
7. To turn off the system, please use Ctrl + c on each host running one of the runXX.sh scripts. For killing rmi registries, please run killrmis.sh script.

In progress:

• Transactions
• Replication