[erlang-questions] Streaming a folder from one node to another
Mon Dec 21 03:12:04 CET 2015
Re streaming an arbitrarily large folder from one node to another
in a cluster:
1. Why is it necessary to do this?
Why is it impossible or undesirable to just serve blocks from
the files to the other node on demand?
2. You seem to be suggesting that it is necessary to communicate
the whole thing in one go. Why is it not possible to set up
a common initial state and stream changes?
3. What are you going to do if the contents of the folder change
faster than you can stream them?
4. I'm wondering about the cost of streaming vs the cost of simply
switching the storage device from one node's control to
another's. (In the extreme, getting a human to swap cables.
I mean, that could take just seconds. Electronic switching would
likely be better. And yes, I'm thinking of old "truck of tapes"
ideas.) Surely the cluster is equipped to switch devices from
one CPU board to another in order to handle CPU board failure...
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