top button
Flag Notify
    Connect to us
      Site Registration

Site Registration

What is the concept of map-reduce and use of it in mongoDB ?

+4 votes
109 views
What is the concept of map-reduce and use of it in mongoDB ?
posted Jun 14, 2015 by Vikram Singh

Looking for an answer?  Promote on:
Facebook Share Button Twitter Share Button LinkedIn Share Button

Similar Questions
+1 vote

We Have a 3 node mongodb setup with a primary,secondary and an arbiter. If a Primary node goes down the election process to choose a new primary is taking around 30 seconds. During this period all the Create and Update operations fail. So is there anyway to reduce this failover time so that the client application can resume normal operations in less time.

What is the ideal way to handle Create and Update failures during the failover time? Should it be queued and retried? if the number of operations are high the queue size will not be enough. So please suggest a solution for this problem.If the failover time can be reduced it would solve this problem.

We tried reducing the heartbeat interval in the replica configuration. It did not help either

...