Understanding the Transition
The golden rule for managing a switch from ILMT as the reporting tool for IBM sub-capacity licensing over to IT Asset Management as the replacement reporting tool is this: there can only be one source of truth at any given moment. Peak license consumption can be calculated by exactly one tool.
Having a single source of truth must be the case, because the calculation of peak consumption must account for all devices within a single calculation. You may not get the same result from two sub-capacity calculations for a few machines here and a few others there, simply summed (for example, how would you track VM reassignments that transitioned across tool boundaries?); and far more damage may come from overlapping calculations, where one or more servers are included in two different sets of peak calculations, double counted. So the principle is: a single source of truth.
- A separately managed region
- A distinct subsidiary in your company structure
- The time period before transition day, and the future after transition day — at first you have only ILMT providing the peak consumption calculations, and after "throwing the switch" you have only IT Asset Management providing the calculations.
- Initially only ILMT is in use. Of course, it must cover all inventory devices where sub-capacity calculations apply. ILMT sub-capacity peak consumption reports are supplied to IBM at each reporting interval (typically, each quarter). If you also have products that must be licensed at full device capacity, you can record these separately (in theory, even on a spreadsheet if you wanted to). So each quarterly report consists of sub-capacity peak value plus any separate full capacity value.
- IT Asset Management is now introduced. At first, for IBM PVU points it simply connects to the ILMT database, and imports inventory data, product consumption (which IT Asset Management converts into license records), and peak consumption results. ILMT remains the source of truth, even though seen through the lens of IT Asset Management. Meanwhile, for your IBM VPC licenses, you continue to use consumption results from ILMT.
- Now you deploy the FlexNet Inventory Agent to those same target devices
where sub-capacity calculations apply. As usual, the installed FlexNet Inventory Agents gather their inventory daily, uploading it to the
central application server. However, although IT Asset Management now starts internally calculating results from its own inventory, these
are restricted:
- For IBM PVU licenses, IT Asset Management does not publish
these results because, by default, it honors the results calculated
by IMLT and publishes those in the web interface. (In
fact, once both the ILMT agent and the FlexNet Inventory Agent are
uploading data, and the daily import from ILMT is operational,
IT Asset Management provides a report where you can
compare, for every device, both full- and sub-capacity calculation
results from each of the two tools.) ILMT is still the source of
truth.Tip: If it should happen, during this stage, that there is a device reported only in FlexNet inventory (and not reported by ILMT), this device is excluded from sub-capacity calculations (for which ILMT alone is currently responsible), and its consumption must be calculated at full capacity.
- For IBM VPC licenses, since there is no import of license
consumption results from ILMT, IT Asset Management calculates
license consumption. Since IT Asset Management at this point is
not in high-frequency mode, these are full
capacity calculations (by default), and those full capacity
results are displayed in the web interface. This means
that, at this stage, you should continue to use ILMT for your
management of VPC consumption and for reporting to IBM, since ILMT
provides you with the sub-capacity results that represent your
license liability to IBM. ILMT is still the source of truth.Tip: Unlike the PVU case, for VPC there cannot be a built-in report comparing results from ILMT with those from IT Asset Management, since no results are imported from ILMT.
- For IBM PVU licenses, IT Asset Management does not publish
these results because, by default, it honors the results calculated
by IMLT and publishes those in the web interface. (In
fact, once both the ILMT agent and the FlexNet Inventory Agent are
uploading data, and the daily import from ILMT is operational,
IT Asset Management provides a report where you can
compare, for every device, both full- and sub-capacity calculation
results from each of the two tools.) ILMT is still the source of
truth.
- When the agent coverage across target devices is the same for both ILMT and
IT Asset Management, you metaphorically "flick the switch". This
includes changing the installed FlexNet Inventory Agents into high-frequency
mode, so that they can track hardware changes every 30 minutes as IBM
requires; and also changing the default so that results no longer come from
ILMT imports, but from calculations by IT Asset Management. From now
on, the results calculated from FlexNet inventory are the source of truth.
Because IT Asset Management has been saving historical data for
sub-capacity calculations, it is able to prepare reports based on FlexNet
inventory for whichever is the longer of:
- The time since you had FlexNet inventory available (having the FlexNet Inventory Agent installed on devices running software under a sub-capacity PVU or VPC license)
- The current reporting period.
- In one final piece of fine tuning, when setting the reporting period in IT Asset Management, you can also separately set Ignore any value prior to — the date when you want your reports to IBM to be entirely based on FlexNet inventory. You might set this for a few days after turning on high-frequency mode, allowing time to check that everything is working perfectly, all devices are covered and so on. On that date, you archive your final report out of ILMT (even when this is for a part of a reporting period), and from then on reports come from your new source of truth, IT Asset Management.
Project phase | ILMT is source of truth | FNMS is source of truth |
---|---|---|
1. ILMT only |
Covers all subcap devices; provides reports. |
|
2. Integrated presentation |
ILMT consumption data for IBM PVU licenses is imported into IT Asset Management. ILMT provides reports. (For IBM VPC licenses, IT Asset Management displays full capacity consumption results.) |
|
3. Rollout |
FlexNet Inventory Agent is locally installed on the same complete set of sub-cap devices. ILMT provides reports. (For IBM VPC licenses, IT Asset Management displays full capacity consumption results.) |
|
4. Switch |
Turn on high-frequency mode, which inverts the default so that you now prefer sub-capacity results from FlexNet inventory. IT Asset Management provides reports, starting from the effective date of your choice. |
We've already noted above that your operations may be bounded within certain 'spheres of influence'. If this applies to you so that you have several such spheres to deal with, you can undertake phases 1-3 of the above transition process in one sphere, and then move on to another sphere, and continue until all required areas have the FlexNet Inventory Agent fully deployed. Then you can move your entire IT Asset Management implementation into phase 4 in one step (there is a single setting that controls high-frequency mode for an entire implementation at once, and a single schedule for IBM sub-capacity calculations worldwide).
This chapter does not cover your implementation of ILMT. It is possible that you may never implement ILMT, if IT Asset Management is your first inventory and license management tool. In what is perhaps the more common case, it is assumed that you have already implemented stage 1, using ILMT as a free-standing system. You may then start with Using ILMT (and Importing Results) (and its subtopics) for details about stage 2, the integrated presentation of ILMT results for PVU consumption within IT Asset Management.
IT Asset Management (Cloud)
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