Is parity check running?

[kapperz]

I've written a script that will run an encoding job with Handbrake whenever a file is found in a certain directory. Everything works great. I also check to make sure HandbrakeCLI is not already running before queuing any new file in the directory.

 

I would also like to prevent the encode queue if the parity check is currently running. How can I check this in a script?

 

Many thanks

 

I'm using unRaid 4.5

[Joe L.]

I've written a script that will run an encoding job with Handbrake whenever a file is found in a certain directory. Everything works great. I also check to make sure HandbrakeCLI is not already running before queuing any new file in the directory.

 

I would also like to prevent the encode queue if the parity check is currently running. How can I check this in a script?

 

Many thanks

 

I'm using unRaid 4.5

 

you need to use the following as a guide.  If parity sync is not running you get this

root@Tower:/boot# /root/mdcmd status | grep Resync

mdResync=0

 

If it is running, you get something like this:

root@Tower:/boot# /root/mdcmd status | grep Resync

mdResync=976762552

mdResyncPos=90240

mdResyncPrcnt=0.0

mdResyncFinish=3605.2

mdResyncSpeed=4512

 

You can basically just grep for "mdResync="  If it is anything other than 0, a parity check is running.

 

[kapperz]

Thanks for the quick reply. Executing /root/mdcmd status | grep Resync gives me one of the two result (while parity is running) in telnet...

 

Binary file (standard input) matches

 

OR

 

mdResync=1465138552
mdResyncPos=1029122472
mdResyncPrcnt=70.2
mdResyncFinish=86.7
mdResyncSpeed=83788

 

I'm a novice at scripting, but not a total n00b. Could you help a little more with the code?

 

#!/bin/bash
if [ $(/root/mdcmd status | grep Resync) -ne 0 ]
then
echo "Parity running"
else
echo "Not Running"
fi

 

 

[kapperz]

Just a note. If parity is not running, you need to add the -a option to grep

 

	if [ $(/root/mdcmd status | grep -a Resync= | cut -c10) == '0' ]
then
	echo "### Parity NOT running ###"
fi

 

[warhead]

if [ `/root/mdcmd status | grep -aw mdResync | awk -F= '{print$2}'` != 0 ]; then

   echo "Parity check in progress"

   return 1

fi

 

 

 

Your version of just doing grep-a Resync could have problems in the event where parity check is running as grep would return multiple lines and the test statement won't handle it.

the -w flag forces grep to match the word entirely.

 

awk -F= '{print$2}' is a neater way of selecting the data after the equal sign IMO

[Joe L.]

if [ `/root/mdcmd status | grep -aw mdResync | awk -F= '{print$2}'` != 0 ]; then

   echo "Parity check in progress"

   return 1

fi

 

 

 

Your version of just doing grep-a Resync could have problems in the event where parity check is running as grep would return multiple lines and the test statement won't handle it.

the -w flag forces grep to match the word entirely.

 

awk -F= '{print$2}' is a neater way of selecting the data after the equal sign IMO

 

And yours might choke if something other than a numeric value is returned at some point in the future, or nothing is returned.  Probably better to put the "0" in "quotes" as well as the entire `grep ...| awk ` command"

 

if [ "`/root/mdcmd status | grep -aw mdResync | awk -F= '{print $ 2}'`" != "0" ]; then

    echo "Parity check in progress"

    return 1

fi

[warhead]

And yours might choke if something other than a numeric value is returned at some point in the future, or nothing is returned. 

 

Future proofing - good catch 

[kapperz]

Thanks all. I'm still learning.