jira 6 high availability: license ?

[Calogero Bonasia]

starting from this page:
https://support.atlassian.com/customer/servicedesk-portal

I found an answer:
https://answers.atlassian.com/questions/105538/share-your-best-practices-for-jira-high-availability-failover-strategies

I tried to read the document but it seems that I do not have the permissions
https://confluence.atlassian.com/display/ATLAS/Failover+for+JIRA

then I have the same result for this other page
https://confluence.atlassian.com/display/JIRA/Is+Clustering+or+Load+Balancing+JIRA+Possible

my question is simple: right now my company is using one jira server version 5.1.8.

my intention is to migrate to jira6 and make two server.

I want to know if I can configure two jira server so that they are in high reliability between them.

but I doubt: I can use the same product license jira or should I buy two licenses, one for each server jira?

[Nic Brough -Adaptavist- · Accepted solution]

It depends on what you mean by "high availability".  

If you have a standby JIRA server - one that is NOT running until you have a problem and have turned off the production server, then your licence for production entitles you to a "developer" licence which is free and has many purposes, including "disaster recovery" type stuff.

However, if you're thinking of clustering and load-balancing with two or more active JIRA nodes, then you will need two licences.  But, I wouldn't as it really does not work at all, ever, with standard Jira.   

However, if you move to JIRA 6.3 and still want to do this, then you need to look at JIRA data centre (I mention 6.3 because that's the first version that can be "data-centred") That will do it, and he licence model is different, it's not really "get another licence", the whole model changes.