# Unexpected behavior on EC2 **URL:** \ **Category:** Installation\ **Created:** [August 18, 2014, 5:13pm UTC](https://discuss.aerospike.com/t/unexpected-behavior-on-ec2/312 "2014-08-18T17:13:54Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![oldforum](https://avatars.discourse-cdn.com/v4/letter/o/13edae/32.png) [@oldforum](https://discuss.aerospike.com/u/oldforum)\ **Post date:** [August 18, 2014, 5:13pm UTC](https://discuss.aerospike.com/t/unexpected-behavior-on-ec2/312/1 "2014-08-18T17:13:54Z")
by amdalal » Thu Oct 10, 2013 8:51 pm Hello all, In my test setup on EC2 I have done following: 1. One Aerospike server is running in ZoneA (say Aerospike-A). 2. Another node of the same cluster is running in ZoneB (say Aerospike-B). 3. The application using above cluster is running in ZoneA again. 4. I am initializing AerospikeClinet like this: With above setup I am getting below behavior: 1. Writes are happening on both Aerospike-A and Aerospike-B. 2. Reads are only happening on Aerospike-A (data is around 1million records, occupying 900MB of memory and 1.3 GB of disk) 3. If I take Aerospike-B down, everything works perfectly. There is no outage. 4. If I take Aerospike-A down, all the writes and reads start failing. I’ve waited for 5 mins for other node to take traffic but it didn’t work. ---
**Author:** ![oldforum](https://avatars.discourse-cdn.com/v4/letter/o/13edae/32.png) [@oldforum](https://discuss.aerospike.com/u/oldforum)\ **Post date:** [August 18, 2014, 5:14pm UTC](https://discuss.aerospike.com/t/unexpected-behavior-on-ec2/312/2 "2014-08-18T17:14:14Z")
by devops01 » Thu Jul 31, 2014 3:26 pm Could share your full code for testing. Also is the client running on same machine as Node A? In a normal case an Aerospike 2 node Mesh configured cluster would form and handle both read and writes. Running auto-dun may have also been a factor. best, Lucien