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From Gabriel Mancini <>
Subject Re: Couchbase Mobile to CouchDB on AWS - Looking for instance sizing advice.
Date Mon, 02 Jul 2012 20:19:42 GMT
Hi Douglas,

   You can create a doc Json on _replicator base, and when  the couchdb
server restart he will survive...


On Mon, Jul 2, 2012 at 3:51 PM, Douglas Turner <> wrote:

> Hi Octavian
> There are two halves to the cronjob. First is finding any new databases
> that have been created on Server A, creating them on Server B then starting
> replication. Second, send a replication continuous = true for existing
> databases.This covers server changes/moves, new databases, missing
> replication instances.
> My understanding is that I can send the replication request multiple times
> with no ill effects and continuous replication does not survive server
> reboots. Using _replicator has been problematic in my usage and I have yet
> to have create_target=true work, so I have opted to take the KISS approach.
> LOL, at least that is how I see it.
> Thanks!
> Doug
> On 7/2/12 11:15 AM, Octavian Damiean wrote:
>> Hello Douglas,
>> Is there a special reason for using a cron job to continously sync
>> between the two remote databases? CouchDB offers continous replication
>> already.
>> Cheers,
>> Octavian Damiean
>> On Mon, Jul 2, 2012 at 7:28 PM, Douglas Turner<>
>>  wrote:
>>> Hello
>>> Let's see if I can articulate this sufficiently.
>>> Some background: I am a one person shop, I wear all the hats and I have
>>> been
>>> learning everything as I go for the last 18-20 months, so I am still a
>>> bit
>>> of a noob.
>>> I have an iOS app created in Titanium using Pegli's ti_couchbase module.
>>> If
>>> the user wants to enable syncing, they enter their requested GroupName,
>>> Password, eMail address.  The app reaches out to a php document that uses
>>> php-on-couchdb to check if the GroupName (database name) is available,
>>> if it
>>> is, that database is created with the proper authorization/password. This
>>> all works great and I am very pleased with it.
>>> I am currently running everything into IrisCouch. I am considering
>>> changing
>>> over to AWS as IrisCouch seems a bit slow, plus last week they were down
>>> all
>>> morning one day. I have everything up and running on an AWS micro
>>> instance.
>>> (Couchdb 1.2). In fact I have two instances, Couch A and Couch B. Couch
>>> B is
>>> my backup server and has a cron job running a script to continuously
>>> replicate everything on A to B.
>>> The current version of my app has about 3k users. If history is an
>>> indicator, when this syncing version is released, I expect about 250
>>> users
>>> (world wide) per day to update to the sync version. I expect 80% will
>>> enable
>>> syncing. The numbers I am anticipating are 200 people per day creating a
>>> database initially syncing 300-600 documents (2-4Meg per db). The Couchdb
>>> server is for replication only.
>>> After the initial updates I anticipate an average of 15 users per day
>>> growth, databases created with less than 20 docs to start.
>>> Using Cloudant is not an option at this time and I would rather get away
>>> from IrisCouch.
>>> Will a Micro instance be sufficient or will I need to go larger?
>>> Thank you for the help and advice!

Gabriel Mancini de Campos
Arquiteto de Soluções

+55 (11) 9449-1706
São Paulo - SP - Brasil

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