Re: How to speed up chunk mitgration in MongoDB?

[David Hows]

Hi Christopher,

There is no option to make chunk migrations faster. In the particular situation you mentioned you may wish to look at exporting all data from the node, then importing the data into the new sharded instance. However, you are basically pre-sharding from scratch.

The chunk size may play a factor - but only by adding extra metadata for each write, the overall volume of data being transfered is the same.

That said, longer term having a smaller chunk size will mean you will migrate chunks more regularly.

Cheers,

David