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mongodbsharding

mongos chunksize error in mongo 3.4.2

I have mongo version 3.4.2 and I have the following command:

mongos --configdb localhost:27016 --chunkSize 1 --port 27020

It doesn't work in my version of mongo. Could somebody help to solve it? I don't want to degrade to previous version of mongo by the way. It used to work under the previous versions (ex. 3.2).

Solution

  • You can't use the --chunkSize option anymore.

    From 3.4 release notes:

    MongoDB 3.4 removes the following configuration options from the mongos: sharding.chunkSize configuration file setting and --chunkSize command-line option sharding.autoSplit configuration file setting and --noAutoSplit command line option

    You will have to use the procedure described here in order to modify the chunk size:

    use config
db.settings.save( { _id:"chunksize", value: 1 } )