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<!-- [metadata]>
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title = "In-memory storage driver"
description = "Explains how to use the in-memory storage drivers"
keywords = ["registry, service, driver, images, storage, in-memory"]
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<![end-metadata]-->
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# In-memory storage driver (Testing Only)
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For purely tests purposes, you can use the `inmemory` storage driver. This
driver is an implementation of the `storagedriver.StorageDriver` interface which
uses local memory for object storage. If you would like to run a registry from
volatile memory, use the [`filesystem` driver ](filesystem.md ) on a ramdisk.
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**IMPORTANT**: This storage driver *does not* persist data across runs. This is why it is only suitable for testing. *Never* use this driver in production.
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## Parameters
None