Jetstream can be used in several different virtual machine (VM) sizes which are charged in service units (SUs) based on how much of the total system resource is used. The basic unit of VM allocation for Jetstream is based on a virtual CPU (vCPU) hour: 1 service unit (SU) is equivalent to 1 vCPU for 1 hour of wall clock time. A standard ‘Tiny’ VM instance consists of 1 vCPU, 2 GB of RAM, and 8 GB of storage. This corresponds closely to a ‘t2.small’ instance in Amazon Web Services. The majority of storage within an instance is available for user data but will vary based on the VM image selected. The table below outlines the VM sizes created for Jetstream.
Please note that s1.* flavors are still listed but are no longer available for new instances. Existing instances are not affected.
VM Size | vCPUs | RAM (GB) | Local Storage (GB) | SU cost per hour* | Can be saved as an image? |
|---|---|---|---|---|---|
m1.tiny | 1 | 2 | 8 | 1 | ✔︎ yes |
m1.small | 2 | 4 | 20 | 2 | ✔︎ yes |
| m1.quad | 4 | 10 | 20 | 4 | ✔︎ yes |
m1.medium | 6 | 16 | 60 | 6 | ✔︎ yes |
m1.large | 10 | 30 | 60 | 10 | ✔︎ yes |
m1.xlarge | 24 | 60 | 60 | 24 | ✔︎ yes |
m1.xxlarge | 44 | 120 | 60 | 44 | ✔︎ yes |
| s1.large | 10 | 30 | 120 | 10 | ✘ No |
| s1.xlarge | 24 | 60 | 240 | 24 | ✘ No |
| s1.xxlarge | 44 | 120 | 480 | 44 | ✘ No |
This allocation information may be subject to changes in the future.
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