BabuDB

[bg_...@aliyun.com]

Hello there,

    Haha, it is me! This time I want to ask about BabuDB's knowledge and source code. What is the main function of BabuDB in XTreemFS? And why is BabuDB instead of Redis? What if I use Redis?

Thank you for your reply and precious time! ! !

Bgzyy

[Robert Schmidtke]

Hi,

BabuDB is used by the DIR and MRC services to store their databases, like metadata information. I'm not too involved with this project, so I cannot tell you much about the inner workings.

I think this is one of the main interfaces for these databases in XtreemFS: https://github.com/xtreemfs/xtreemfs/blob/master/java/xtreemfs-servers/src/main/java/org/xtreemfs/mrc/database/StorageManager.java

And this is the BabuDB implementation for it: https://github.com/xtreemfs/xtreemfs/blob/master/java/xtreemfs-servers/src/main/java/org/xtreemfs/mrc/database/babudb/BabuDBStorageManager.java

I would think that you could create a RedisStorageManager class that implements the StorageManager interface.

BabuDB is small without overheads that come with more general key-value stores, giving it less flexibility, but just the right functionality that XtreemFS requires. So it should be the most efficient solution here. However feel free to experiment with other techniques.

Cheers

Robert

On Friday, December 28, 2018 at 10:11:31 AM UTC+1,