LimitationsĪll new containers would not have the increased rootfs size. However, there are certain limitations to this solution. This feature would allow us to expand the base device size on daemon restart, which means all future images and containers (based on those new images) will be of new size. $ docker rmi fedoraĪnd start a container on this new Fedora image:Īs we can see, the container rootfs size is now 20GB.
#Docear default size changes update
So let’s remove the existing Fedora image and update it from the registry. Since our new container is based on our old Fedora image, which is based on the old base device size, the new container would not get a 20-GB device size unless we update the image. Why is the container still showing 10GB of container rootfs size? Shouldn’t we be getting 20 GB? This is expected behavior. Now let’s start a Fedora container and see if we get the new container rootfs size: Let’s double check it using the docker info command:Īs we can see, the base device has been expanded. We have changed the base device size to 20 GB on daemon restart. Note I used the word “expand” and not “change”, which means we cannot set the base device size to 5 GB (less than the existing base device size: 10GB) on daemon restart. With this feature we can expand the Base device size on daemon restart to 20 GB. What if I want my container rootfs (device) size to be 20 GB? I cannot do that since the base device size is set to 10 GB. Increasing the Base Device Size on daemon Restart We can also check this using the docker inspect command with some filters:Īs we can see the container device size in docker inspect output is also 10 GB (10737418240 / 1024 3 ). Let’s start a container on this Fedora image:Īs we can see in the above container, the device size of this container is 10 GB. For the purpose of this article, let’s use Fedora as an example image. I will give you an example of growing it. However, there are times when Volumes might not be suitable for your needs. Many users add Volumes instead of growing the base device, which is why they haven’t used this feature yet. Changing the base size will not actually change the physical usage of containers unless they grow larger than 10 GB.
In Devicemapper, new container/images take zero size and grow up to the maximum size. All future images and containers would be a snapshot of this base device.īase size is the maximum size that a container/image can grow to. So what is this base device size? The first time docker is started, it sets up a base device with a default size of 10 GB. If you do docker info, you will see base device size in the output.
#Docear default size changes drivers
This feature has been included in Docker 1.10, so you can try it out now.īefore we jump further into this article, I would like to point out that this feature is only available for devicemapper storage and does not apply to other storage drivers like overlay, btrfs, aufs, etc.
Sometime back I wrote a feature for docker to allow expanding Base device size on daemon restart. Using 75pt instead.Increasing the Base Device Size on Docker Daemon Restart ``Package relsize Warning: Font size 383.35397pt is too large. The relsize package provides commands to set font sizes relative to the current font size-i.e., the font size in use at the location where you want to make a size change for example, when typesetting footnotes the current (font) size is smaller than within the main text.įor historical reasons, which we won’t explore (but see here), many TeX/LaTeX font-sizing/scaling operations involve the value \(\text-size limit reached and a warning is given:
Other packages for changing font size: relsize and scalefnt Document classes also support options for explicitly setting the font size of the main document text (and other components): LaTeX uses the document class, loaded via the \documentclass command, to set the default font size for various elements, such as footnotes and section headings, which form part of the document’s content. Using tex.stackexchange to find helpful examples.Using the \fontsize and \selectfont commands.Using document classes to set font sizes.This article reviews several methods for changing font size-use the following links to jump to the article section(s) of interest: 6.2.1 Example: using the scalefnt package.6.1.2 Example: using the relsize package.6 Other packages for changing font size: relsize and scalefnt.
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