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The ecs-sync program is specifically designed for the parallel bulk moving of data from one storage technology to another. It comes from the Dell/EMC support labs, and is what EMC support engineers use for migrating data. It certainly is possible to install ecs-sync outside of Grace, for example on a lab workstation to rapidly move data to or from ROSS. However in this article we only discuss the use case of moving data between ROSS and Grace using the ecs-sync installed by the HPC Admins.
Due to security issues, we do not offer the job-oriented service mode described in the ecs-sync documentation. (If the ecs-sync maintainers ever fixed the security holes, we could reconsider.) Instead we only support running ecs-sync in what its documentation calls "Alternate (legacy) CLI execution", where a user runs ecs-sync as a command, instead of queuing up a job. This allows the command to be run in the context of the user's login, honoring permissions. One side effect is that the copied data could end up being owned by the user running the command, regardless of who owned the source data, which might not be desirable for all cases.
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