C Space For Mac

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C Space engages with hundreds of thousands of people – patients, caregivers and physicians – every day. They’re generating insights that are helping our clients understand how COVID-19 is affecting lives, informing and de-risking decisions about how to address those needs. Healthcare as we know it will be forever changed. This rugged hard disk drive uses a USB-C interface, is compatible with Mac and Windows PCs and is water and shock-resistant. A 4TB Thunderbolt with USB-C version is available for Thunderbolt.

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Docker Desktop stores Linux containers and images in a single, large “disk image” file in the Mac filesystem. This is different from Docker on Linux, which usually stores containers and images in the /var/lib/docker directory.

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Where is the disk image file?

To locate the disk image file, select the Docker icon and thenPreferences > Resources > Advanced.

The Advanced tab displays the location of the disk image. It also displays the maximum size of the disk image and the actual space the disk image is consuming. Note that other tools might display space usage of the file in terms of the maximum file size, and not the actual file size.

If the file is too big

Mac

If the disk image file is too big, you can:

  • move it to a bigger drive,
  • delete unnecessary containers and images, or
  • reduce the maximum allowable size of the file.

Move the file to a bigger drive

To move the disk image file to a different location:

  1. Select Preferences > Resources > Advanced.

  2. In the Disk image location section, click Browse and choose a new location for the disk image.

  3. Click Apply & Restart for the changes to take effect.

Do not move the file directly in Finder as this can cause Docker Desktop to lose track of the file.

Delete unnecessary containers and images

Check whether you have any unnecessary containers and images. If your client and daemon API are running version 1.25 or later (use the docker version command on the client to check your client and daemon API versions), you can see the detailed space usage information by running:

Alternatively, to list images, run:

and then, to list containers, run:

If there are lots of redundant objects, run the command:

This command removes all stopped containers, unused networks, dangling images, and build cache.

Space

It might take a few minutes to reclaim space on the host depending on the format of the disk image file:

  • If the file is named Docker.raw: space on the host should be reclaimed within a few seconds.
  • If the file is named Docker.qcow2: space will be freed by a background process after a few minutes.

Space is only freed when images are deleted. Space is not freed automatically when files are deleted inside running containers. To trigger a space reclamation at any point, run the command:

Note that many tools report the maximum file size, not the actual file size.To query the actual size of the file on the host from a terminal, run:

In this example, the actual size of the disk is 2333548 KB, whereas the maximum size of the disk is 64 GB.

Reduce the maximum size of the file

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To reduce the maximum size of the disk image file:

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  1. Select the Docker icon and then select Preferences > Resources > Advanced.

  2. The Disk image size section contains a slider that allows you to change the maximum size of the disk image. Adjust the slider to set a lower limit.

  3. Click Apply & Restart.

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When you reduce the maximum size, the current disk image file is deleted, and therefore, all containers and images will be lost.

C Space For Mac Computers

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