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is it possible to make query to primary when slaveOk is true
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Sergejs Degtjars  
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 More options Aug 1 2012, 9:05 am
From: Sergejs Degtjars <sergedegt...@gmail.com>
Date: Wed, 1 Aug 2012 06:05:55 -0700 (PDT)
Local: Wed, Aug 1 2012 9:05 am
Subject: is it possible to make query to primary when slaveOk is true
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I have shareded cluster. My application connects to mongos with
slaveOk=true.
I some situation I need to check existence of document with concrete value,
and if it isn't present allow to insert new, or deny insert if it exists.
In stress load, we are discovered possibility to get wrong reply to query,
because it queries slaves when replication isn't done.

Is there possibility using 10gen C# driver to call MongoCollection.FindOne
method with primary node as target?

Thanks.


 
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craiggwilson  
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 More options Aug 3 2012, 10:13 am
From: craiggwilson <craiggwil...@gmail.com>
Date: Fri, 3 Aug 2012 07:13:56 -0700 (PDT)
Local: Fri, Aug 3 2012 10:13 am
Subject: Re: is it possible to make query to primary when slaveOk is true
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You cannot call FindOne with a different slave ok value.  However, FindOne
is just a helper for Find(...).Limit(1).  Since Find returns a MongoCursor,
you can set the slaveOk value there.


 
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