On 4/8/12 9:25 PM, Mic wrote:
Hi,
Does spawn spread the task across computer nodes in a cluster eg like
in Julia http://julialang.org/manual/parallel-computing/ ?
Currently, no.
Any plans maybe also to build spawn on top of MapReduce and HDFS API
for Hadoop like in Python
http://sourceforge.net/apps/mediawiki/pydoop/index.php?title=Main_Paget ?
Currently, no.
We are currently not targeting distributed computing. Some of the
features in Rust—e.g., unique pointer transfer between tasks—are really
intended for processes with shared memory.
Nonetheless, the current design would permit a distributed
implementation: all sendable things are also copyable (and tree-shaped,
for that matter), which means that they could in theory be efficiently
serialized and sent over the wire.
However, as we evolve, there are some planned features that do not lend
themselves so well to a distributed setting. For example, we would like
to make use of regions to allow the construction of a message that has
arbitrary shape (for example, a graph) and which can then be sent as a
whole. While it is of course possible to serialize graphs, it's just
harder and slower. But I guess that so long as we stick to a strict "no
shared memory" model (which I think we will) then a distributed
implementation is always a possibility.
(Data or small-scale task-parallelism, as discussed in the recent thread
on ray tracing, is a different matter of course. That often only makes
sense with shared memory. But we don't currently have any features
targeting this.)
Niko
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