How to get the number of current servers which are not down from the c++ client

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Jul 27, 2012, 1:37:42 AM7/27/12

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Hi:

when I use replica set , and make w=3 when use the c++ client to insert data , if one of the mongod down ,How to get the number of current servers which are not down from the c++ client ?

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Kristina Chodorow

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Jul 30, 2012, 10:55:17 AM7/30/12

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There's no automatic way. You would have to call isMaster on the primary and then try to connect to each of the hosts in the host list.

That is one reason we have the w="majority" option: it has almost the same safety properties as w=(total # of members) but will still work if a node is down.

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