ricellis commented on issue #2015: parse_revid - Badarg error in HTTP request URL: https://github.com/apache/couchdb/issues/2015#issuecomment-487582522 Re: https://github.com/apache/couchdb/issues/2015#issuecomment-487321849 >but the reality is that pouchdb generates rev values using a different algorithm There are also other replicator compatible data stores that generate rev IDs differently to (at least current) CouchDB e.g. the Cloudant sync libraries. We don't do anything particularly unusual, in fact, we use a random UUID similarly to CouchDB prior to deterministic revs. I do think that maintaining backwards compatibility with those types of revs probably ought to be a goal here as trying to migrate rev formats in existing datastores would be painful. If there _have_ to be some sort of forced rev format/algorithm then I think there needs to be clearly defined versioning for replicators such that Couch N would always be able to replicate with rev ids that were supported by the replicator from at least Couch N-1, for example.
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