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From "Jacob Wright (Created) (JIRA)" <>
Subject [jira] [Created] (COUCHDB-1337) Use MD5 for attachment ETag
Date Mon, 07 Nov 2011 22:30:52 GMT
Use MD5 for attachment ETag

                 Key: COUCHDB-1337
             Project: CouchDB
          Issue Type: Improvement
    Affects Versions: 1.1.1
            Reporter: Jacob Wright
            Priority: Minor

Currently attachments use the revision number of the document they're attached to for their
ETag. This can be inefficient if many attachments are added, removed, or modified on the same
document. Example: a website's assets might be stored on a document. Whenever one file is
changed every file on the website drops out of cache.

If we could use the MD5 of the attachment for the ETag then any caches (including the browser's)
will not drop unchanged files, even if the document to which they are attached is modified.

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