On 11.01.2012 21:13, Antonio Rodriges wrote:
Thank you, Uwe,
below are my comments
In particular, how to prohibit some set of functions, for example,
from "base" package?
You can't: R is free software.
This does not imply it must be inflexible and unsuitable for cloud services
The opposite: It implies it is extremely flexible in the sense a user
can do anything the OS allows, e.g by installation of packages that
reimplement functions you had prohibited before. I don't see why this is
related to cloud services. In a cloud process, again, the user can do as
much with R as the OS allows, hence you may want to run it in a virtual
machine in such a case.
Uwe Ligges
Well, of course you could build your own
version of R that did not ship those functions. Anyway, typical restrictions
are handled by settig permissions on the file system and/or arrange quotas
for space / memory / CPU resources.
Disk quotas and permissions are helpful in case when R function
depends on disk access. For other functions something more special
must be devised.
How to limit session operating memory and CPU time?
Ask he manual of your operating system.
The most straightforward Linux command is ulimit which limits
CPU/memory per shell/user/system wide. However, sessions are child
processes of R and this requires testing whether limits will cover all
sessions or each session separately.
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