November 2017
Intermediate to advanced
298 pages
7h 10m
English
Content preview from Deployment with Docker
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overlay and overlay2
These particular storage drivers are slowly becoming a favorite for Docker installations. They are very similar to aufs but are much faster and simpler implementation. Like aufs, both overlay and overlay2 require a kernel overlay module included and loaded, which in general should be available on kernels 3.18 and higher. Also, both can run only on top of ext4 or xfs filesystems. The difference between overlay and overlay2 is that the newer version has improvements that were added in kernel 4.0 to reduce inode usage, but the older one has a longer track record in the field. If you have any doubt, overlay2 is a rock-solid choice in almost any circumstance.
If you have not worked with inodes before, note that they contain ...
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