| Answer |
| · What
are the download algorithms employed by LoRS? How does LoRS choose
the depots closest to a certain destination?
LoRS has two methods available for
using the highest bandwidth depot for downloads. One is explicit, as
defined by the resolution file, the second is adaptive, as defined by
the progressive-redundancy download algorithm.
To make use of the explicit downloading, you must have an accurate
resolution file that reflects the topology of the depots in the LBone
available to your client machine. Currently LoRS does not have a means of
calculating network topology dynamically. The current
resolution file contains geographic distance information, which is
often a poor substitute for network topology.
The adaptive download algorithm prefers depots that respond quickly
over those that take a relatively longer time to respond. In the
adaptive case there is no a priori knowledge of the relative speed of
the depots to your client unless an accurate resolution file is used.
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| · I have
installed the LoRS tools from source. What is the lors_setup.sh program?
The shell script lors_setup.sh is
designed to setup the LoRS tools preferences file named ".xndrc". It
is written to the user's home directory and records the user's primary
location as well as other application defaults.
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| · Does
LoRS support resuming on transfers?
LoRS download supports resume with
release 0.82.
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| · Is
there a command line tutorial for the LoRS tools?
Yes, follow this link.
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| · How
do I use MCopy in lors_augment?
MCopy in lors_augment creates a
tree using route_depots (R) and target_depots (T)
If you do not have a mono-spaced font, this diagram will appear
distorted:
/----->T1
source -->R------>T2
----->T3
Without specifying the route depots in the .xndrc file, it uses the
programmed defaults, which are in Tennessee. The flexibility of the
command line tool for more complicated routing schemes is clearly
limited. For more complex scenarios, use the LoRS API.
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| · What
is LoRS View?
LoRS View is the TCL/Tk GUI used
for easier tool control and visual feedback of transfers. The best
feature of LoRS View is the geographic view of the L-Bone. During the
different upload, augment or download operations, you may watch the
discrete transfers as they occur.
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| · How
do I install the Windows package?
Go to this page.
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| · I'm
having problems downloading an ISO file. What should I do?
If you are experiencing difficulty
downloading a Linux ISO on any platform, it may be due to the decay of
the exNode. Because IBP is not static storage, it expires over time and
must be moved or refreshed to preserve file integrity. Despite our best
efforts, it is still possible from time to time to have the ISOs exNode
decay to a point of uselessness.
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