Isilon and AWS datasync

Hello All,

We are replicating all data from Isilon H400 (NFS) to s3 bucket via DataSync as backup and DR solution, unfortunately we are experiencing issues in daily sync job, and AWS told me it can support 50 millions files in each task.

I created a new task for the child folder contains 15 millions of files, its total size is 29.5TB and the job is failed again with "Cannot allocate memory" message. 

I have allocated memory to Datasync appliance as suggested by AWS engineer but still no luck, it failed again.

Here I like know whether any one using DataSync as backup and DR in their Environment? If yes, do you have any issues like this?