Hardware requirements

Snow Owl with a co-located Elasticsearch cluster

For installations where Snow Owl and Elasticsearch are co-located, we recommend the following hardware specifications:

Snow Owl & co-located ES	Cloud	Dedicated
vCPU	8	8
Memory	32 GB	32 GB
I/O performance	>= 5000 IOPS SSD	>= 5000 IOPS SSD
Disk space	200 GB	200 GB

Snow Owl with a managed Elasticsearch cluster

For installations where Snow Owl connects to a managed Elasticsearch cluster at elastic.co we recommend the following hardware specifications:

Snow Owl	Cloud	Dedicated
vCPU	8 (compute optimized)	8
Memory	16 GB	16 GB
I/O performance	OS: balanced disk TS file storage: local SSD	OS: HDD / SSD TS file storage: SSD
Disk space	OS: 20 GB TS file storage: 100 GB	OS: 20 GB TS file storage: 100 GB

Elasticsearch @ elastic.co
vCPU	8 (compute optimized)
Memory	4 GB
I/O performance	handled by elastic.co
Disk space	180 GB

In case Snow Owl is planned to be used with resource-intensive workloads (large code system upgrades, frequent classification of terminologies, bulk authoring) an 8 vCPU / 4 GB Elasticsearch cluster might not be sufficient. Consider increasing the size of the hosted Elasticsearch instance gradually, so that finding the sweet spot will be straightforward.

Cloud VMs

Here are a few examples of which Virtual Machine types could be used for hosting the Terminology Server at the three most popular Cloud providers (including but not limited to):

Cloud Provider	VM type
GCP	c2d-highcpu-8
AWS	c5d-2xlarge
Azure	F8s v2