If you need to use CHDFS, please see Purchase Guide for more information on the billing mode and see Getting Started for more information on how to activate and use the service.
No. Currently, you can only access CHDFS from the same region in a VPC.
It can be used on Hadoop 2.x or above.
CHDFS supports concurrently reading the same file, but at any point in time, it supports writing the same file by only one client.
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