README.md

Testing GCE VM suspend/resume latency

time ./suspend-test.sh  &> output.txt

tl;dr

• COS VM create takes ~10s
• VM delete takes ~2m20s
• resuming a VM takes ~8-10s
• suspending a VM takes ~20-25s

Both operations are faster than create/delete, but create vs resume is pretty close.

output.txt

==== CREATE / DELETE ====
ERROR: (gcloud.compute.instances.delete) Failed to fetch some instances:
 - The resource 'projects/my-project/zones/us-east4-a/instances/suspend-test' was not found

  == create ==
Created [https://www.googleapis.com/compute/v1/projects/my-project/zones/us-east4-a/instances/suspend-test].
NAME          ZONE        MACHINE_TYPE   PREEMPTIBLE  INTERNAL_IP  EXTERNAL_IP    STATUS
suspend-test  us-east4-a  n1-standard-1               10.150.0.81  35.245.49.179  RUNNING

real	0m9.399s
user	0m1.105s
sys	0m0.148s
  == delete ==
Deleted [https://www.googleapis.com/compute/v1/projects/my-project/zones/us-east4-a/instances/suspend-test].

real	2m18.469s
user	0m0.655s
sys	0m0.138s
  == create ==
Created [https://www.googleapis.com/compute/v1/projects/my-project/zones/us-east4-a/instances/suspend-test].
NAME          ZONE        MACHINE_TYPE   PREEMPTIBLE  INTERNAL_IP  EXTERNAL_IP    STATUS
suspend-test  us-east4-a  n1-standard-1               10.150.0.82  34.86.127.112  RUNNING

real	0m9.621s
user	0m1.133s
sys	0m0.157s
  == delete ==
Deleted [https://www.googleapis.com/compute/v1/projects/my-project/zones/us-east4-a/instances/suspend-test].

real	2m17.396s
user	0m0.742s
sys	0m0.170s
  == create ==
Created [https://www.googleapis.com/compute/v1/projects/my-project/zones/us-east4-a/instances/suspend-test].
NAME          ZONE        MACHINE_TYPE   PREEMPTIBLE  INTERNAL_IP  EXTERNAL_IP  STATUS
suspend-test  us-east4-a  n1-standard-1               10.150.0.83  34.86.3.252  RUNNING

real	0m8.401s
user	0m1.122s
sys	0m0.175s
  == delete ==
Deleted [https://www.googleapis.com/compute/v1/projects/my-project/zones/us-east4-a/instances/suspend-test].

real	2m16.187s
user	0m0.634s
sys	0m0.142s
==== SUSPEND / RESUME ====
Created [https://www.googleapis.com/compute/v1/projects/my-project/zones/us-east4-a/instances/suspend-test].
NAME          ZONE        MACHINE_TYPE   PREEMPTIBLE  INTERNAL_IP  EXTERNAL_IP    STATUS
suspend-test  us-east4-a  n1-standard-1               10.150.0.84  35.221.50.255  RUNNING
  == suspend ==
Suspending instance(s) suspend-test...
.......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................done.
Updated [https://compute.googleapis.com/compute/beta/projects/my-project/zones/us-east4-a/instances/suspend-test].

real	3m21.688s
user	0m0.690s
sys	0m0.171s
  == resume ==
Resuming instance(s) suspend-test...
..........................................done.
Updated [https://compute.googleapis.com/compute/beta/projects/my-project/zones/us-east4-a/instances/suspend-test].

real	0m10.872s
user	0m0.662s
sys	0m0.146s
  == suspend ==
Suspending instance(s) suspend-test...
.......................................................................................................................................done.
Updated [https://compute.googleapis.com/compute/beta/projects/my-project/zones/us-east4-a/instances/suspend-test].

real	0m29.373s
user	0m0.662s
sys	0m0.144s
  == resume ==
Resuming instance(s) suspend-test...
...............................done.
Updated [https://compute.googleapis.com/compute/beta/projects/my-project/zones/us-east4-a/instances/suspend-test].

real	0m8.632s
user	0m0.611s
sys	0m0.129s
  == suspend ==
Suspending instance(s) suspend-test...
............................................................................................done.
Updated [https://compute.googleapis.com/compute/beta/projects/my-project/zones/us-east4-a/instances/suspend-test].

real	0m20.651s
user	0m0.679s
sys	0m0.145s
  == resume ==
Resuming instance(s) suspend-test...
..............................done.
Updated [https://compute.googleapis.com/compute/beta/projects/my-project/zones/us-east4-a/instances/suspend-test].

real	0m8.455s
user	0m0.695s
sys	0m0.151s
Deleted [https://www.googleapis.com/compute/v1/projects/my-project/zones/us-east4-a/instances/suspend-test].

suspend-test.sh

#!/usr/bin/env bash

set -e

N=3
NAME=suspend-test
ZONE=us-east4-a

echo "==== CREATE / DELETE ===="
gcloud compute instances delete $NAME --zone=$ZONE --quiet --delete-disks=all || true # ignore failures
for i in $(seq 1 $N); do
  echo "  == create =="
  time gcloud compute instances create-with-container $NAME --container-image=nginx --zone=$ZONE
  echo "  == delete =="
  time gcloud compute instances delete $NAME --zone=$ZONE --quiet --delete-disks=all
done

echo "==== SUSPEND / RESUME ===="
gcloud compute instances create-with-container $NAME --container-image=nginx --zone=$ZONE || true # ignore failure
for i in $(seq 1 $N); do
  echo "  == suspend =="
  time gcloud beta compute instances suspend $NAME --zone=$ZONE
  echo "  == resume =="
  time gcloud beta compute instances resume $NAME --zone=$ZONE
done 
gcloud compute instances delete $NAME --zone=$ZONE --quiet --delete-disks=all