incubator-couchdb-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Ceriel Jacobs <cerieljac...@gmail.com>
Subject Documentation: 1. Order in which replication is executed 2. Single invocation multiple ports 3. Replication bound to a
Date Fri, 11 Dec 2009 20:34:39 GMT
Dear list,

1. Quote from the documentation: [1]
> "... for each updated document, only fields and blobs that have changed are replicated...
If replication > fails... the next replication restarts at the same document where it left
off"

My question is: "How is the order of replication?" 
In other words: "In which order are things in a CouchDB replicated?"

For instance:
* 1st most recent changes, 2nd older changes, 3th oldest changes
and/or
* 1st inserts, 2nd updates, 3th deletes
and/or
* 1st data, 2nd BLOB's
and/or
* 1st documents in the top of the tree, 2nd are documents in the second level of the tree,
etc.
and/or
* 1st walking down a tree till its leave, then the next leave of the same parent, until the
last, and then one level up

Any information that clarify the inner workings is welcome.
Especially in situations with mixed data and BLOB's.

In case BLOB's are replicated with identical priority as stored data, that could lead to a
design decision where BLOB's will not be stored in CouchDB though on the file system level.
This to ensure that textual content is replicated with highest priority.

2. A related question is if a single invocation of CouchDB can be bound to multiple ports?

3. In case this is possible, can replication then be bound to run on a specific port?
This would give the ability to limit the bandwidth of replication traffic with a firewall
rule. And not reduce the speed other (CouchDB) network traffic.



Thanks in advance,
~Ceriel


[1] http://couchdb.apache.org/docs/overview.html



Mime
View raw message