koushik-das commented on issue #1960: [4.11/Future] CLOUDSTACK-9782: Host HA 
and KVM HA provider
URL: https://github.com/apache/cloudstack/pull/1960#issuecomment-303663868
 
 
   @rhtyd See my responses below
   
   >> Host-HA is disabled by default, it needs explicit configuration and to be 
enabled in order to be used.
   These are relevant once the need for the new HA framework is justified. Lets 
keep these things aside for now.
   
   >> The new agnostic HA framework also has resource life cycle management 
using bounded ephemeral queues for managing very large environments (10k+ hosts)
   Is there any data/bug suggesting that the existing framework is not able to 
scale for 10k+ hosts? Currently also there is a host based bounded queue for 
monitoring commands ().
   
   >> Pluggability of the framework was another reason, it cleanly allows for 
large scale users to implement their own algorithms/logic to carry out various 
operations such as investigate/activity-checks/degrade/recover/fence etc.
   The same is possible with the existing framework as well. A new 
investigator/fencer can be easily added.
   
   >> Due to several reasons and requirements, oobm could not been simply put 
in existing KVM specific VM-HA.
   Can you provide more details as to why this cannot be done?
   
   The last paragraph is again irrelevant at this point. I understand that you 
have put in a considerable amount of effort but based on the discussion so far, 
I don't see any strong justification regarding the need for a new framework.
   
   
   
 
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