5.3 KiB
| title | TARGET DECK | FILE TAGS | tags | ||
|---|---|---|---|---|---|
| Content-Addressable Storage | Obsidian::STEM | fs::cas |
|
Overview
CAS (content-addressed storage) refers to storage that allows retrieval based on content (as opposed to name or location). Usually the contents of a file are passed through a cryptographic hash function to generate a key that can be used for subsequent retrieval.
%%ANKI Basic What is content-addressed storage? Back: A method for storing information such that it can be retrieved based on its content. Reference: “Content-Addressable Storage,” in Wikipedia, February 27, 2024, https://en.wikipedia.org/w/index.php?title=Content-addressable_storage&oldid=1210669681.
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%%ANKI Basic What is considered the "opposite" of content-addressed storage? Back: Location-addressed storage. Reference: “Content-Addressable Storage,” in Wikipedia, February 27, 2024, https://en.wikipedia.org/w/index.php?title=Content-addressable_storage&oldid=1210669681.
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%%ANKI Basic What is CAS an acronym for? Back: Content-addressed storage. Reference: “Content-Addressable Storage,” in Wikipedia, February 27, 2024, https://en.wikipedia.org/w/index.php?title=Content-addressable_storage&oldid=1210669681.
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%%ANKI Cloze {1:Content}-addressed is to {2:URNs} whereas {2:location}-addressed is to {1:URLs}. Reference: “Content-Addressable Storage,” in Wikipedia, February 27, 2024, https://en.wikipedia.org/w/index.php?title=Content-addressable_storage&oldid=1210669681.
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%%ANKI Basic Interpreted as a key-value store, what is a "key" in a CAS system? Back: The digest produced when running content through a cryptographic hash function. Reference: “Content-Addressable Storage,” in Wikipedia, February 27, 2024, https://en.wikipedia.org/w/index.php?title=Content-addressable_storage&oldid=1210669681.
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%%ANKI Basic Interpreted as a key-value store, what is a "value" in a CAS system? Back: The actual content being stored. Reference: “Content-Addressable Storage,” in Wikipedia, February 27, 2024, https://en.wikipedia.org/w/index.php?title=Content-addressable_storage&oldid=1210669681.
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%%ANKI Basic In the context of CAS, what is a "content address"? Back: A digest produced when running content through a cryptographic hash function. Reference: “Content-Addressable Storage,” in Wikipedia, February 27, 2024, https://en.wikipedia.org/w/index.php?title=Content-addressable_storage&oldid=1210669681.
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%%ANKI Cloze Content addresses are an alternative to {location} addresses found in traditional filesystems. Reference: “Content-Addressable Storage,” in Wikipedia, February 27, 2024, https://en.wikipedia.org/w/index.php?title=Content-addressable_storage&oldid=1210669681.
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%%ANKI Basic Why are CAS systems sometimes called "fixed content storage"? Back: CAS is normally used for files that are not frequently edited. Reference: “Content-Addressable Storage,” in Wikipedia, February 27, 2024, https://en.wikipedia.org/w/index.php?title=Content-addressable_storage&oldid=1210669681.
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%%ANKI Basic How is it CAS systems ensure file uniqueness? Back: An attempt to store an already stored file will generate the same key as before. Reference: “Content-Addressable Storage,” in Wikipedia, February 27, 2024, https://en.wikipedia.org/w/index.php?title=Content-addressable_storage&oldid=1210669681.
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%%ANKI Basic How is it CAS systems ensure file's remain unchanged? Back: A file's key will always be the same provided the content has not changed. Reference: “Content-Addressable Storage,” in Wikipedia, February 27, 2024, https://en.wikipedia.org/w/index.php?title=Content-addressable_storage&oldid=1210669681.
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Bibliography
- “Content-Addressable Storage,” in Wikipedia, February 27, 2024, https://en.wikipedia.org/w/index.php?title=Content-addressable_storage&oldid=1210669681.
- Scott Chacon, Pro Git, Second edition, The Expert’s Voice in Software Development (New York, NY: Apress, 2014).