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i4i.8xlarge on Databricks

i4i.8xlarge is a storage optimized AWS worker type with 32 vCPUs and 256 GB of memory. On Databricks it uses 11 DBUs an hour, so 1 node on Jobs Compute in US East (N. Virginia) costs $4.40 an hour: $1.65 for the DBUs and $2.75 to AWS for the machine.

AWS · Storage optimized · i4i

i4i.8xlarge at a glance

vCPUs
32
Memory
256 GB
Own SSD
7,500 GB
DBUs an hour
11
Classic compute
With Photon
31.9
DBUs an hour, Jobs Compute
1 node an hour
$4.40
Jobs Compute, US East (N. Virginia)

1 node an hour on each kind of compute

In US East (N. Virginia) on the Premium plan. Databricks charges the DBUs, AWS the machine. A cluster pays this for every worker and for the driver.

ComputeDBUs an hourA DBUDatabricksMachineAn hour
Jobs Compute11$0.15$1.65$2.75$4.40
Jobs Compute + Photon31.9$0.15$4.78$2.75$7.53
All-Purpose Compute11$0.55$6.05$2.75$8.80
All-Purpose Compute + Photon22$0.55$12.10$2.75$14.85
Lakeflow pipelines Core11$0.20$2.20$2.75$4.95
Lakeflow pipelines Core + Photon31.9$0.20$6.38$2.75$9.13
Lakeflow pipelines Pro11$0.25$2.75$2.75$5.50
Lakeflow pipelines Pro + Photon31.9$0.25$7.97$2.75$10.72
Lakeflow pipelines Advanced11$0.36$3.96$2.75$6.71
Lakeflow pipelines Advanced + Photon31.9$0.36$11.48$2.75$14.23

In each region

1 node an hour on Jobs Compute, Premium, cheapest first.

RegionMachineAn hour
US East (N. Virginia)$2.75$4.40
US East (Ohio)$2.75$4.40
US West (Oregon)$2.75$4.40
US West (N. California)$3.03$4.68
Canada (Central)$3.03$4.68
Europe (Ireland)$3.03$4.68
Asia Pacific (Mumbai)$3.12$4.77
Europe (London)$3.19$4.84
Europe (Paris)$3.19$4.84
Asia Pacific (Tokyo)$3.22$4.87
Asia Pacific (Seoul)$3.22$4.87
Europe (Frankfurt)$3.27$4.92
Asia Pacific (Singapore)$3.29$4.94
Asia Pacific (Sydney)$3.29$4.94
Asia Pacific (Jakarta)$3.29$4.94
South America (São Paulo)$4.38$6.03

Questions

How many DBUs does i4i.8xlarge use on Databricks?
i4i.8xlarge uses 11 DBUs an hour on Databricks classic compute without Photon. With Photon it uses 31.9 DBUs an hour on Jobs Compute and 22 on All-Purpose Compute, as Databricks' price list gives them.
How much does i4i.8xlarge cost an hour on Databricks?
In US East (N. Virginia), 1 i4i.8xlarge node on Jobs Compute costs $4.40 an hour: $1.65 to Databricks for 11 DBUs at $0.15 each, and $2.75 to AWS for the machine. On All-Purpose Compute the same node costs $8.80 an hour, and on Lakeflow pipelines Core $4.95. A cluster pays this for every worker and for the driver.
Does Photon cost more on i4i.8xlarge?
Yes, by the hour: with Photon, 1 i4i.8xlarge node on Jobs Compute in US East (N. Virginia) costs $7.53 an hour instead of $4.40, because it uses 31.9 DBUs an hour instead of 11. It saves money only when the job finishes fast enough to make up the difference.
Which region is cheapest for i4i.8xlarge on Databricks?
US East (N. Virginia), at $4.40 an hour for 1 node on Jobs Compute, against $6.03 in South America (São Paulo), the dearest of the 16 regions listed here that offer it. Databricks charges the same for a DBU of Jobs Compute in every AWS region listed, so the gap is the machine.
What is the same size as i4i.8xlarge on the other clouds?
The nearest worker types of the same kind are Standard_L32s_v3 on Azure and n2-standard-32 on Google Cloud. Each cloud gives its own DBUs an hour for its types, so compare what a cluster costs in the calculator, not the DBUs alone.
What is the next size up or down from i4i.8xlarge?
One size down is i4i.4xlarge, at 5.5 DBUs an hour; one size up is i4i.16xlarge, at 22. Within a family, DBUs and the machine price grow with the vCPUs, so 2 nodes of a size cost about what 1 node of twice the size costs.