Execute several commands through ssh with local and remote values

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I am writing a program to match local values with remote ones. As of now, my code is functional and looks like this :

#!bin/bash

MY_ARRAY=('value1' 'value2' 'value3')
for VALUE in "${MY_ARRAY[@]}"
do
    echo "$VALUE : $(ssh admin@machine matching_function $VALUE)" >> output.file
done

The only problem is that for every iteration of the loop, it creates and closes a new ssh connection. As my original dataset is quite big, it takes a long time to execute.

I was looking for a way to optimize this, and read about passing multiline commands to ssh with :

ssh admin@machine << EOF
    ...
    #some instructions
    ...
EOF

However, it does not work and I get errors like Pseudo-terminal will not be allocated because stdin is not a terminal.. I suspect this is partly due to the fact my remote shell is restricted.

I am also unsure about how bash will differentiate $VALUE, which should be interpretated from my local computer, and matching_function, which should be interpretated from the remote one

asked 34 secs ago

Ploutox

165