Instruction for McPrem, The UTA DØGrid Team, Dec. 5, 2003
Instructions for McPrem, the McPerM Remote Daemon
Dec. 5, 2003
Prashant Bhamidipati
( prashant@hepmail.uta.edu )

The McP_remote.tar contains the following files.
o main_xml
o make_dir
o xml_modules.py
This is the main script which converts the archives to XML.
This is the script which will create the required directory structure.
This files contains various modules required by main_xml for
various conversions and file types.
o conf_file
This is a sample configuration file from which the final
configuration file for your farm will be created.
1. $FARM_BASE is a good place to store the mcperm scripts. So, create a folder
‘mcperm’ in $FARM_BASE and store the McP_remote.tar in the folder.
2. Untar McP_remote.tar using the command tar –xvf McP_remote.tar. Above four
files will be in the $FARM_BASE/mcperm folder.
3.By
default,
McPrem
creates
the
XML
database
for
the
archives
in
$FARM_BASE/mcperm/database. However, if a different location is desired to store
these files (for example due to the available storage space, etc), do the following:
o
Edit the file main_xml
o Change the variable main_database_location to the desired location
main_database_location= [full path to desired database location]
4. The frequency with which the script main_xml is to be executed can be controlled by
the update_interval parameter in the same file. Default is 12 hours. One can change this
interval to the desired value as follows:
o Edit the file main_xml
o Change the variable update_interval to the desired value
update_interval=your_desired_time_interval
5. Run the script make_dir in the $FARM_BASE/mcperm folder as follows:
o make_dir <farm_name> <host_name> <university> <globus_fetch>

The parameters enclosed in < > are necessary parameters . All
have to be given. Their significance is as follows

<farm_name>: This is the name of your farm as you would like it
to appear on the final McPerM display (eg :
Please keep it short.
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UTA-SWIFT).
Instruction for McPrem, The UTA DØGrid Team, Dec. 5, 2003

<host_name>: This is the host name of the globus gatekeeper node
that the main server from UTA will fetch the XML database files
from. The directory where the database is fetched from must be
accessible from the gatekeeper node. (eg : hepfm000.uta.edu)

<university>: This parameter is same as the first three characters
(like “OU-“, “UTA”, “LTU”, “TAT”, or “LU-“) of the job-name
on your farm, that is set by McFarm.

<globus_fetch>: This parameter specifies whether the XML files
are to be deleted after being fetched by the main server. Options
are:

enable : would NOT DELETE the files

disable : would DELETE these files upon completion of
fetch
The synopsis of this make_dir script is
main_xml UTA-SWIFT hepfm007.uta.edu UTA enable
The following structure is created in the mcperm folder after step 5. The files
main_xml and xml_modules are also automatically moved to the
$FARM_BASE/bin folder.
Once the above is done, you can start the main_xml daemon by issuing the command as
the user mcfarm.
main_xml start
You can also stop main_xml daemon by issuing the command as the user mcfarm,
main_xml stop
From this point on, the ball is in UTA McPerM server’s court.
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