MongoDB on EC2: XFS or EXT4 preferred? Inconsistence in mongo docs?

From: "'Matthieu Rigal' via mongodb-user" <mongodb-user@xxxxxxxxxxxxxxxx>
To: mongodb-user <mongodb-user@xxxxxxxxxxxxxxxx>
Date: Wed, 11 May 2016 09:19:02 -0700 (PDT)
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Hi all,

When following this 
chapter: https://docs.mongodb.com/ecosystem/platforms/amazon-ec2/#manually-deploy-mongodb-on-ec2 ;
we are encouraged to deploy mongo on EC@ using EXT4 filesystem.

But on the following 
page https://docs.mongodb.com/manual/administration/production-checklist/#operations-checklist ;
it is strongly recommended to use XFS (what we did until now)

XFS is not installed by default, but can be easily added with yum, as 
specified 
here: http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ssd-instance-store.html

Now the question, is still XFS the recommended file systems for all Mongo 
(especially WiredTiger) deployments? If yes should the docs for EC2 be 
adjusted?

Best,
Matthieu


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