Compute

• 1-to-1 mapping for ASG and Instnace Pool
• Scaling is done on the basis of
  • Metric based
    • Cpu utilization
    • Memory utilization
  • Schedule based: cron expression
    • Scale pool size
    • Change in instance state[start or stop]
• In Event of Scale-In, instances are terminated first based on how many instances from the instance pool are in that availability domain and fault domain. Within a placement, the oldest instances are terminated first.

Instance types

• BM [Bare metal / physical machine],
• VM[Virtual Machine]

• Template type
  • Fixed Shape [BM/VM] : Can not be resized
  • Flexible Shape [VM only] : Can be resized cpu and memory
• Shape Types
  • Standard Shapes : Designed for general purpose workloads and suitable for a wide range of applications and use cases. Standard shapes provide a balance of cores, memory, and network resources. Standard shapes are available with Intel or AMD processors.
  • Dense I/O Shapes : Designed for large databases, big data workloads, and applications that require high-performance local storage. DenseIO shapes include locally-attached NVMe-based SSDs.
  • GPU Shapes : Designed for hardware-accelerated workloads. GPU shapes include Intel CPUs and NVIDIA graphics processors.
  • HPC Shapes : Designed for high-performance computing workloads that require high frequency processor cores and cluster networking for massively parallel HPC workloads.
  • Optimized shapes
• Capacity Type
  • On-demand capacity
  • Preemptible capacity
  • Reserved capacity
  • Dedicated capacity
• You can launch console connections that can be connected from your local machine or cloud itself.
• Compute agent provides cpu/memory/io/read/write/network/load metric, which is genrally installed in available images
• Default os can also show OS management and top process
• Cloud-init script can be setup for executing at provison time
• Stop and start does not change the IP [epeheraml ip], however, terminating instance will free that.
• Custom Image from computing will  only include boot volume, region-specific. Maximum size is 300 GB. Instance will shut down for a few minutes while creating images.
• Custom Images can be exported to OS and can be imported
• You can move instances in different fault domains but SAME AD
• Console connection
  • Not booting/need to reset ssh key for the OPC user [default user in oracle linux], edit system configuration
  • Serial console connection / vnc console connection
  • Need private/public key pair
  • Stop / start [can choose boot option and can edit boot file]/ reboot logs will display

Auto Scaling (ASG)

• 1-to-1 mapping for ASG and Instnace Pool
• Scaling is done on the basis of
  • Metric based
    • Cpu utilization
    • Memory utilization
  • Schedule based: cron expression
    • Scale pool size
    • Change in instance state[start or stop]
• In Event of Scale-In, instances are terminated first based on how many instances from the instance pool are in that availability domain and fault domain. Within a placement, the oldest instances are terminated first.