google compute engine - What is the difference between an Instance and an Instance group -

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i wondering difference between instance , instance group are.

can explain difference me?

why can use autoscaler instance group , not instance

in gce, instance single virtual machine can customise (cpu, network, endpoint, disk, etc) , manage (shutdown, run, build new image, etc)

https://cloud.google.com/compute/docs/instances/

an instance virtual machine hosted on google's infrastructure.

instances can run linux images provided google, or customized versions of these images. can build , run images of other operating systems.

while instance group collection of instances above, management. i.e. have 2 groups, slow instances , fast instances.

autoscaler can use managed instance group. group created instance manager using instance template.

https://cloud.google.com/compute/docs/instance-groups/

a compute engine autoscaler automatically adds or removes virtual machines managed instance group based on increases or decreases in load. allows applications gracefully handle increases in traffic , reduces cost when need resources lower. define autoscaling policy , autoscaler performs automatic scaling based on measured load.

hope helps. cheers.


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