Question about HACMP for active-active mode

qiulang · #1 (**permalink**) 4 Weeks Ago

Hi all,

I am new to HACMP. So sorry for the newie question. But I did search the forum and it seems that no one asks this before.

So if a 2-node cluster runs in active-active mode (and the same application), what is the benefit of using HACMP ?

If it runs in active-stanby, it is easy to understand because you need HACMP to do failover; but for active-active mode, no failover (right ?), then why do we need HACMP ?

Besides, I find HACMP documents do not use the term "active-active" or "active-standby" (cold standby or hot standby) often. So does "concurrent resource group" mean "active-active" and "cascading/rotating resource group" mean "active-standby" ? Is there a cold standby ?

And what is the relation between "concurrent resource group" and "concurrent shared disk access"; what's the relation between "Cascading/Rotating resource group" and "non-concurrent shared disk access" ?

Thanks!

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