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Wily Introscope EM Manager of Managers (MoM) concept

Former Member
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We are investigating how to go about setting up a Wily Introscope Enterprise Manager 8.x cluster with the concept of using the "Manager of Managers" and would like advice on how to do so. We currently have our Wily Introscope EM running on a single host (where our SolMan resides) and based on the number of agents we have connecting back to our host (+110) we are finding performance does not hold up. We recently upgraded our EM from 7.2 to 8.0 to determine if an upgrade was all we needed, however it doesn't seem to have improved the situation. We are trying to figure out how many systems are required to satisfy the MoM concept. We'd like to get an idea of how others have implemented such an environment and what works best, any thoughts? My initial thought here would be using two dedicated hosts (4gb memory) to handle the requests with our master EM 8.0 accepting requests from those two hosts. Any thoughts would be appreciated and shared experiences are helpful! Thanks!

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Former Member
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Documentation references:

- The online documentation of Introscope 8 (can be reached via the

default dashboard "Navigation 1" explains some details on how to setup

an EM cluster. But in general, it explains more the details on how to

set it up.

- The sizing toolkit contains some details on the different options for

scaling Introscope (additional isolated EMs vs. an EM cluster):

http://service.sap.com/diagnostics -> Media Library -> Sizing toolkit.

In general, Introscope EM 8 is expected to offer twice the capacity of

EM 7.2. On most OS, this is 500.000 metrics with the EM configured well

(large heap, fast CPUs, data directory on dedicated disk/controller). Inyour scenario with >110 agents, you may still reach this capacity limit,such that you may indeed need scaling.

One primitive option to scale is to simply add another EM (same host or

different host) and connect some agents to this EM. In SOlution MAnager,you simply add both EMs.

Pros: Simple in setup, good isolation

Cons: No unified view on all agents, no other EM cluster features like

fallback, load balancing

The alternative is an EM cluster:

EMs in collector role accept agent connections and do most of the work,

as before.

An additional EM (the "Manager of Managers", MoM) connects to all

collector EMs and provides a unified view. Furthermore, you can direct

agents to the MoM and the MoM will balance the agents between the

collectors.

If you do not use the load balancing feature, but instead direct agents

directly to collector EMs, it's easy to switch between isolated EMs and

an EM cluster: Simply leave the MoM away.

Regarding EM distribution to hosts:

In general, you can run multiple EMs on a single host, assuming

dedicated IO paths for each EM's data directory, and enough CPU/memory.

Hope this helps to get an overview?

former_member203322
Participant
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Hello

I'm evaluating both possibilies and have some questions :

what is the MOM workload ? is he taking care of load balancing between the different EMs (I beleive in SMD setup I have to provide the MOM hostname)?

thanks and regards

Michele