How many cloud spanner instances should I have for a database I want to have a single database along with a single instance

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How many cloud spanner instances should I have for a database? I want to have a single database along with a single instance.
Nov 20, 2019 in GCP by anonymous
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1 answer to this question.

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To provide high availability and low latency for accessing a database, Cloud Spanner requires 1 node for every 2 TB of data in the database. 

For example, if your instance has 1 database that stores 3.5 TB of data, you need to provision at least 2 nodes. 

Those nodes will keep the instance below the limit until the database grows to 4 TB. 

After your database reaches that size, you need to add another node to allow the database to grow. 

Otherwise, writes to the database will fail. For a smooth growth experience, add nodes before this limit is reached for your database.

answered Nov 20, 2019 by Sirajul
• 59,230 points

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