On 2014-10-25 05:11, Siji Sunny wrote:
>> > We are trying to identify the right approach to do Fail-Over and Load
>> > Balancing in Linux server (Centos7), which contains Mariadb(mysql) and
>> > web-server (nginx) with some services such as Video On Demand, Games,
>> etc.
>> > (streaming through Intranet, not Internet)
>> >
>> > Please guide, to select the right technology/solution (Ofcource
>> OpenSource)
>> > to do so. Its seems complicated for me because of the dynamic data (eg:
>> If
>> > a user watching video and fail over happens, he should get seamless
>> > streaming without interruption).
>> >
>> > I have considered HA-Cluster (Heartbeat) for Failover and HA-Proxy for
>> load
>> > balancing, but still not sure, how to handle dynamic data fail over.
>> >
>> I would consider using heartbeat with a DNS round robin approach.
>> 
>> If you have a very low TTL for your DNS entry and a failover happens
>> your video
>> streaming should tolerate it.
>> 
> 
> Thanks Vikas.
> 
> Yes I am expecting very low TTL for our DNS entry, since its managed
> locally, but this approach supports failover too ?
> 
Yes - when you need to failover, you reconfigure the DNS entry to point 
to the new location.

If the TTL is low, the DNS change will propagate quickly - so requests 
will be directed to the new host.
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