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Definitions
Page history last edited by Paul McCullagh 4 days ago
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domain
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- A domain is the top level separation of files. File keys are unique within domains. A domain consists of a set of classes that define the files within the domain. Examples of domains: fotobilder, livejournal.
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- class
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- Every file is part of exactly one class. A class is part of exactly one domain. A class, in effect, only specifies the minimum replica count of a file. Examples of classes: userpicture, userbackup, phonepost.
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- key
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- A key is a unique textual string that identifies a file. Keys are unique within domains. Examples of keys: userpicture:34:39, phonepost:93:3834, userbackup:15.
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- minimum replica count
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- This is a property of a class. This defines how many times the files in that class need to be replicated onto different devices in order to ensure redundancy among the data and prevent loss.
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- file
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- A file is a defined collection of bits uploaded to MogileFS to store. Files are replicated according to their minimum replica count. Each file has a key, is a part of one class, and is located in one domain. Files are the things that MogileFS stores for you.
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Definitions
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