On 05/09/2013 09:57 AM, Tyler Brekke wrote: > For High availability RGW you would need a load balancer. HA Proxy is > an example of a load balancer that has been used successfully with > rados gateway endpoints. Strictly speaking for HA you need an HA solution. E.g. heartbeat. Main difference between that and load balancing is that one server serves the clients until it dies, then another takes over. With load balancing, all servers get a share of the requests. It can be configured to do HA: set "main" server's share to 100%, then the backup will get no requests as long as the main is up. RRDNS is a load balancing solution. Dep. on the implementation it can simply return a list of IPs instead of a single IP for the host name, then it's up to the client to pick one. A simple stupid client may always pick the first one. A simple stupid server may always return the list in the same order. That could be how all your clients always pick the same server. -- Dimitri Maziuk Programmer/sysadmin BioMagResBank, UW-Madison -- http://www.bmrb.wisc.edu
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