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54 lines
1.6 KiB
Bash
54 lines
1.6 KiB
Bash
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#!/bin/bash
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# spin up drives faster ?
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# http://www.admin-magazine.com/HPC/Articles/GNU-Parallel-Multicore-at-the-Command-Line-with-GNU-Parallel
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# http://www.gnu.org/software/parallel/parallel_tutorial.html#Building-the-command-line
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logger "BOOJUM note - spinning up disks $0"
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logfile=~/spinup.log
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echo "`date` - boojum spinup called - spinning up disks" >> $logfile
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infile=/run/shm/paratmp.list
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> $infile # clearit
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# exec to use
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para=/usr/bin/parallel
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# populate list of drives - REF: http://unix.stackexchange.com/questions/132126/which-command-to-force-a-drive-to-spin-up
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# TODO random seek - 1-100 RND
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# random REF: https://stackoverflow.com/questions/8988824/generating-random-number-between-1-and-10-in-bash-shell-script
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for c in /dev/sd?; do
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myrand=$(( ( RANDOM % 100 ) + 1 ))
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mycmd="echo $c;/bin/dd if=$c of=/dev/null bs=4096 skip=$myrand count=1 iflag=direct"
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echo "$mycmd" >> $infile
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# `$mycmd &`
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done
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#jobs
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#limitt=6
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limitt=5
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#cat $infile |$para -j $limitt --progress --keep-order --group --linebuffer --results $paradir qpbatch
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#cat $infile |$para -j $limitt --progress fdisk -l $1
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#|grep Disk
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date1=`date +%s` # seconds
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time cat $infile |$para -j $limitt --progress
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wait;
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date2=`date +%s` # seconds
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let date3=$date2-$date1
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echo "`date` + spinup took ($date3) seconds" >> $logfile
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#/bin/dd if=$1 of=/dev/null bs=4096 count=1 iflag=direct
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# combine lines of output for brevity
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# REF: https://stackoverflow.com/questions/9605232/how-to-merge-every-two-lines-into-one-from-the-command-line
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#/root/bin/hd-power-status |awk 'NR%2{printf "%s ",$0;next;}1'
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/root/bin/hd-power-status
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#echo 'o DONE: '`date` #>> ~/$outlog
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exit;
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