If You use nfs more than 5 server read latency and write latency was very slow. we need to move other way. I have idea to solve your issue. Because we face that same problem after we solve that problem using without nfs mount.
I'm experienced DevOps guy (over 6 years). Worked within the Cloud for integration processes (Amazon web services, Windows Azure, Eucalyptus, CloudStack, and RightScale). Performed DevOps for Linux and Windows platforms. Focused on automation and integration. Monitored developed applications and fixed bugs. Wrote code and designed continual updates. Completed load and performance testing of extremely complex systems. Used PowerShell for DevOps in Windows-based systems. Focused on automation, integration, monitoring and configuration management. Streamlined applications delivery to get applications out to customers faster. Utilized SQL database systems (Mysql, MSSql, Postgresql, Mariadb). Utilized NoSQL database systems (mongodb, Dynomodb, dynamodb). Completed load balancing and proxying of systems, servers and components(HA Proxy/Netscaler, Nginx/Apache/lighttpd, Varnish).Experienced with Interpreted Languages Perl and Python. Understands Compiled languages, C, C++, C#, PHP and JAVA.