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https://issues.apache.org/jira/browse/COUCHDB-351?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Paul Joseph Davis updated COUCHDB-351:
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Skill Level: Committers Level (Medium to Hard)
> intra-document checkpointing during replication
> -----------------------------------------------
>
> 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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