Disk writing speed is one of the major factors for zk write performance. Is the disk setup the same across both of these machines? My guess is that is a big factor.
On Tue, Feb 7, 2017 at 2:24 AM, Amar Gajbhiye <[email protected]> wrote: > 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 > > > > > > > > > > > > > > > > > > >
