SAP Instance on AWS - Down sizing steps

[veeras81]

Hello All,

We are using EHP8 ECC6.0 & S4HANA 1709 in AWS . We have many demo systems where the size of those instance are R4.Xlarge with 4 VCPU`s and 30.5GB RAM. As part of cost consciousness we want this to be migrated to smaller instance R4.large where it will have only 2 VCPU`s and 16GB RAM. I am trying to find out step by step approach for this and i am not getting enough documentation . Can any one help me on this?

We are using SAP ASE16 as ur DB and Linux as our OS. Even for S4HANA we need the same kind of steps.

Thanks,

Veera

[MarioDeFelipe]

Hi Veera

r4 is an old family these days, as soon as you migrate to a new instance type, it will be possible to change the virtualization type, the hypervisor is different in new families

1. Take an AMI, and suspend auto scaling if you have it enabled.
2. Stop the instance choose Actions > Instance Settings > Change Instance Type
3. Beware if you use a public IP address, this will change, but private address will remain

new r5 instances are based on the Nitro and require EBS-backed AMIs with the Elastic Network Adapter (ENA) drivers installed. So you must install the ENA drivers

Also, on Nitro, EBS volumes are exposed as NVMe block devices so you must first install the NVMe drivers on your instance. Also, to mount file systems at boot time using /etc/fstab, you must use UUID/Label instead of device names on Nitro.