Why Zookeeper is always configured with odd number of nodes ?

This is a 2 min readSomeone in Quora.com asked me  “Why Zookeeper is always configured with odd number of nodes ?”. Well, thats a great question but sad part is, not even many practitioners, even those who use Zookeeper in production can explain it simply. I will try to keep this really simple, I promise. ZooKeeper (ZK) is a highly-available, highly-reliable and… Continue reading

C for Consistency : Inconsistencies about “consistency” in data systems

This is a 2 min readThere are countless resources explaining CAPl, there are a lot of confusions around this subject. CAP has everything to do with distributed systems, NoSQL data stores happen to be one type of distributed system but surprisingly CAP has been misunderstood after the popularity of NoSQL data stores. IMHO no one explains these better than these… Continue reading