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Posted to dev@couchdb.apache.org by "Adam Kocoloski (JIRA)" <ji...@apache.org> on 2009/05/14 16:02:45 UTC
[jira] Created: (COUCHDB-351) intra-document checkpointing during
replication
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/%3cA192849F-B7EE-48A2-B010-D63D171FC034@gmail.com%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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[jira] Updated: (COUCHDB-351) intra-document checkpointing during
replication
Posted by "Paul Joseph Davis (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/COUCHDB-351?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Paul Joseph Davis updated COUCHDB-351:
--------------------------------------
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/%3cA192849F-B7EE-48A2-B010-D63D171FC034@gmail.com%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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