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Same instance name on AWS across different subnets scenario

  • 1.  Same instance name on AWS across different subnets scenario

    Posted Thu August 06, 2020 02:13 PM

    Hi, we have a scenario on AWS where IBM dev/test software is installed on instances that are offered to testing teams to have them deployed across different subnets, but using the same hostname.  

    Also, some environments could run a couple of hours a day, not necesarily at the same time and not every day.

    Example:

    *DB2_instance1 running on subnets (environments) 10.100.1.0, 10.100.2.0 and 10.100.3.0. Same instance type each (i.e. 2 vCPUs)

    *Day 1 - DB2_instance1 runs on 10.100.1.0 from 08:00 to 10:00 and DB2_instance1 runs on 10.100.3.0 from 13:00 to 16:00

    If we were to count the high-water mark for this day it would be 2vCPU x 70PVUs/core = 140 PVUs

    *Day 2 - DB2_instance1 running on the three environments at the same time during the day

    The high-water mark for Day 2 would be then 3 x 2vCPU x 70 PVUs/core = 420 PVUs

    If ILMT were deployed on this scenario, we believe that this approach is a bit impractical due to the fact that the software scans are scheduled to happen overnight by design).

    Also, let's say that even if the software scans were successful, there would be an issue due to the potential duplicate records (on this scenario I believe ILMT would report just DB2_instance1 once).

    So my questions are:

    - Is there any workaround to have the high-water mark (peak) properly reported on the day 2 scenario? How does the dependency on the duplicate hostname affect here?

    - Due to the dynamic usage on AWS, would it be possible to trigger a software scan once the machines are turned-on?

    Appreciate any thoughts!

    D.






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  • 2.  RE: Same instance name on AWS across different subnets scenario

    Posted Fri August 14, 2020 08:16 PM

    Hi,

    you can trigger a software scan at any time. That was changed in a version last year. Now the default software scan runs when it was actioned and waits 7 days for the next scan.

    However this is fully customizable

    second: duplicate hostnames are no issue. BigFix/ILMT uses a unique computer ID which is generated once the besagent registers on the besroot.

    If that is what you want, it is perfectly possible to have different computers having the same hostname. The Computer ID can be displayed in both BigFix and ILMT

    .Randy






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