intra-document checkpointing during replication
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Key: COUCHDB-351
URL: https://issues.apache.org/jira/browse/COUCHDB-351
Project: CouchDB
Issue Type: New Feature
Components: Database Core
Reporter: Adam Kocoloski
Priority: Minor
Ben Cohen noted that Couch will fail to make progress if a link is never up
long enough to transfer a specific large document or attachment:
http://mail-archives.apache.org/mod_mbox/couchdb-user/200905.mbox/%[email protected]%3e
If we want to do intra-document checkpointing we'll need:
1) support for the Range header in GET requests
2) a place to store partially-transferred docs/attachments when a replication
fails -- possibly as attachments to the replicator _local doc. On the other
hand, this feature is not really replication-specific, so we'd probably want
some sort of standalone "upload cache" that saves partial transfers.
3) for push replication, an extension to the _missing_revs API that can
describe partial transfers existing on the target
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