Activating the LDM Installation
- Become the
LDM user in their
home directory.
- If the home directory isn't the LDM installation
directory (which is unusual) then go to the LDM installation
directory:
cd $LDMHOME
- If an
LDM is running, then stop it:
ldmadmin stop
- If the
runtime symbolic link
exists, then
remove it:
rm runtime
- Create the
runtime symbolic link
to the just-installed LDM:
ln -s ldm-6.7.0 runtime
- Ensure that a valid
product-queue
exists by doing one of the following:
-
If the
product-queue
doesn't exist and the command
df -k data
indicates that sufficient space exists for it, then
create the
product-queue
with the following command:
ldmadmin mkqueue -f
where the -f option requests "fast" creation.
If you don't have sufficient space for the product-queue,
then you'll have to free-up some space or configure-in a
smaller queue.
- If the
product-queue
exists, then execute the command
pqcheck -v
and do one of the following:
- If the product-queue is invalid, then recreate it
with the following commands:
ldmadmin delqueue
ldmadmin mkqueue -f
- If the product-queue doesn't have a
writer-counter, then
create the counter and set it to zero with the
following command:
pqcheck -F
- Start the LDM:
ldmadmin start
- Verify that the LDM is working:
ldmadmin watch
How quickly this verifies your LDM depends on the rate at which
data-products
are inserted into the
product-queue.
If the
LDM system is already running, then you
can minimize the time that the LDM is off-line
by combining some of the above steps. For example
cd $HOME && ldmadmin stop && rm -f runtime && \
ln -s ldm-6.7.0 runtime && ldmadmin start && ldmadmin watch
If you encounter a problem, check the
LDM logfile for relevant messages.
