Hi, I am working on a distributed system where I want to use consensus algorithm. I am evaluating ZooKeeper for the same. I am trying to quantify read and write operations for zookeeper for version 3.5.2.
I am running following operations. 1. Create 50k Znodes with data 2. Read from those 50k znodes I tried this operations when zookeeper server was running on 4 different remote servers in standalone mode. My client was always on same machine. 1. Test case 1 Server configuration : Windows 8 server R2. jdk 1.7.0_80 Avg time required for each write operations : 1.8 ms Avg time required for each read operations : 0.9 ms 2. Test case 2 Server configuration : Windows 8 server R2. jdk 1.7.0_21 Avg time required for each write operation : 1.7 ms Avg time required for each read operation : 0.9 ms 3. Test case 3 Server configuration : Windows 7 jdk 1.7.0_25 Avg time required for each write operation : 35 ms Avg time required for each read operation : 0.8 ms 4. Test case 4 Server configuration : Windows 7 jdk1.8.0_101 Avg time required for each write operation : 40 ms Avg time required for each read operation : 0.9 ms 5. To get network latency out of picture, I kept both client and server on same machine with following configuration Server configuration : Windows 7 jdk1.8.0_101 Avg time required for each write operation : 30 ms Avg time required for each read operation : 0.4 ms Still, I got same readings. I do not understand, why ZooKeeper gave such a poor write performance on some machines with windows 7. I tried these test cases with different jdk versions. But I am getting same result. However, Read operation performance was same across all deployments. Can someone please point out the possible cause for such extreme results ? Thanks, Amar
