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This question is for Linux, but for fellow windows users who found their way here and want a windows solution...
the problem is your Mongodb service is stopped.
So do the following steps:
1) cntrl-alt-del and open your task manager
2) click on 'services'
3) scroll down to MongoDB
4) right click and hit 'start' (or 'restart')
go back to ...
1
You can use MongoDB's Aggregation Pipeline
to add calculated or constant fields to a query.
The $addFields
stage appends new fields to existing result documents if you don't want to specify
a list of all fields. However, since your example projects a subset of fields you
can also add new fields
using expressions in a
$project stage.
Your find() query would ...
1
my question is to know if this is feasible
A shard key index cannot be multi key, text, or geospatial, so part of your theoretical approach is definitely infeasible. You also mention considering hashed sharding on a datetime field, which could provide better data distribution for otherwise monotonically increasing values like a timestamp. However, a ...
1
Just to clarify in case someone stumbles upon this in the future.
MongoDB Replicasets need a majority vote to elect a primary. So uneven amount of nodes are advised because a 4 member replica set requires 3 votes as well as a 5 member replica set.
But with a 5 member replica set 2 members can go down while with 4 only 1 can go down before the replica set ...
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I had the same issue when i cloned a VM to make the arbiter. Similar to what aldwinaldwin said, I had to change the ip address in this line in my /etc/hosts file "192.168.1.103 mongodb-arbiter.domain.local mongodb1-arbiter" to match the ip address of the server.
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