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Can we use mongo recommended snapshot i.e LVM snapshot across versions?

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Can we use mongo recommended snapshot i.e LVM snapshot across versions? i.e snapshot taken from v2.4.10 and restore it to v3.0.4.
We have tested the same and this works. Is this recommended by mongo?

posted Aug 31, 2015 by anonymous

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1 Answer

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For data files for regular mongod's yes. However, it may be more complex for configdb - there you can use mongodump instead (since it's a relatively small dataset).

answer Sep 1, 2015 by Mandeep Sehgal
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+2 votes

Considering working with a shard replica-set cluster, some emergency such as re-pick primary node will happen and maybe we can retry the command several times for waiting for recover of mongo.

Is there anyone know when use c driver api such as mongoc_collection_update, mongoc_collection_commond, mongoc_collection_insert, which error codes tell me that I can retry command for making the application more robust.

+1 vote

I am in the process of migrating a replica set from a data center to AWS, but when I checked the settings, I noticed that the Sharding is not enabled, yet they are using 3 MongoS / Routers and 3 MongoC / Config servers - So since Sharding is not used in the current system, would it be safe to migrate the replica sets and not use MonogoS nor MongoC ? Can the users connect directly to Mongo database replica set without using MongoS ?
Or should I use at least 1 MongoS and 1 MongoC config server ?

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