Hi Experts.
I am a bit confused about ganesha active-active setup.
We can set up multiple ganesha servers on top of cephfs and clients can point to different ganesh server to serve the traffic. that can scale out the traffic.
From client side, is it using DNS round robin directly connecting to ganesha server ?Is it possible to front all ganesha server with a load balancer so client only connects load balancer IP and byte writes can load balancer across all ganesha server?
My current feeling is we probably have to use DNS way and specific client read/write request can only go to same ganesha server for the session.
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Best regards,Xiaolong Jiang
Senior Software Engineer at NetflixColumbia University
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Load balancing ganesha means some clients are being served by a gateway and other clients by other gateways, so we distribute the clients and their load on the different gateways but each client remains on a specific gateway, you cannot have a single client load balance on several gateways.
A good way to distribute clients on the gateways is via round robin dns, but you do not have, you can distribute ips manually among your clients if you want, but dns automates the process in scalable way.
One note about high availability, currently you cannot failover clients to another ganesha gateway in case of failure, but if you bring the failed gateway back online quickly enough, the client connections will resume. So to support HA in case a host server failure, the ganesha gateways are implemented as containers so you can start the failed container on a new host server.
/Maged
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