Added script
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Massimo Scagliola
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.gitignore
vendored
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.gitignore
vendored
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.DS_Store
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@ -27,7 +27,10 @@ It has been tested with both:
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## Fun facts
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Up today, 4th of July, 2023, none of the major brands of Tape Libraries could provide a tool capable of this. I wrote the script in a day, then tested and fixed it.
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Up today, 4th of July, 2023, none of the major brands of Tape Libraries could provide a tool capable of this.
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I wrote the script in a day, then tested and fixed it.
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Total time spent: 3 days.
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Total money earned: none, so I'll just put it here.
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Total money earned: none, so I'll just put it here.
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P.S. I am aware the script il poorly written, but I don't have a test environment anymore to test it properly. I'll do it in my spare time.
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185
optimizer.sh
Executable file
185
optimizer.sh
Executable file
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#!/bin/sh
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###
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### Usage: ./optimizer.sh </dev/sgX> <parallelism>
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###
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### -h | --help Shows this message
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###
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### optimizer.sh
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### Necessary parameters:
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### - sg device of the library
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### - parallelism
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###
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### The script checks the parallelism with the available drives of the library/partition, then
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### proceeds with loading *all* the tapes in the slots. Mailboxes are ignored.
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### It launches several child processes. The `timeout` command tries to unload the drives,
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### it succeeds when the the tape optimization is done.
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###
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help() {
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sed -rn 's/^### ?//;T;p' "$0"
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}
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if [[ "$1" == "-h" ]] || [[ "$1" == "--help" ]] || [[ "$1" == "" ]]; then
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help
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exit 1
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fi
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log() {
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echo -e "$(date +'%Y-%m-%d %H:%M:%S') $1" | tee -a ${LOG_FILE}
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}
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alive() {
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# $1 "${LIB_SG}"
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# $2 "${SLOT}"
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# $3 "${DRIVE}"
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# $4 "${BARCODE}"
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echo "${4}" > "${TMP}/.drive${3}.lock"
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local PID_ALIVE='1'
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local WAIT=$((3600 + $RANDOM % 7200)) # from 1 to 2 hours
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local TIMEOUT="600" #10 minuti wait before dismounting the tape
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while [ $PID_ALIVE -eq 1 ]; do
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log "ALIVE [$$] - Waiting ${WAIT} secondi..."
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sleep "${WAIT}"
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log "ALIVE [$$] - Trying to unload drive ${3} into slot ${2} (Timeout: ${TIMEOUT} seconds)..."
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timeout "${TIMEOUT}" mtx -f "${1}" unload "${2}" "${3}" #kill after ${TIMEOUT} seconds
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if [[ $(echo $?) == '0' ]]; then
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log "ALIVE [$$] - OK. Drive ${3} unloaded."
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grep -q "$4;drive$3;WIP" "${PROCESSED_BARCODES}" # Check if barcode is WIP
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if [[ $(echo $?) == '0' ]]; then
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log "ALIVE [$$] - Barcode $4 processed."
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sed -i "s/$4;drive$3;WIP/$4;OK/g" "${PROCESSED_BARCODES}"
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rm -f "${TMP}/.drive${3}.lock"
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touch "${TMP}/.drive${3}.ready"
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log "ALIVE [$$] - Drive ${3} newly available. Exit."
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local PID_ALIVE='0'
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return 0 # Fine Alive
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else
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log "ALIVE [$$] - ERROR. Can't find the barcode among the WIP. Exit."
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return 1
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fi # Barcode processato --> OK
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elif [ -f "${TMP}/.drive${3}.lock" ]; then # Drive in use
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log "ALIVE [$$] - Unmount drive ${3} failed, still in use (file .lock). Checking the content."
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grep -q "${4}" "${TMP}/.drive${3}.lock"
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if [[ $(echo $?) == '0' ]]; then
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log "ALIVE [$$] - File content OK. Waiting."
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continue
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else
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log "ALIVE [$$] - ERROR. File content of ${TMP}/.drive${3}.lock not coherent. Exit."
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return 1
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fi
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elif [ -f "${TMP}/.drive${3}.ready" ]; then # Drive available
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log "ALIVE [$$] - Found file ${TMP}/.drive${3}.ready. Drive available. Exit."
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local PID_ALIVE='0'
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return 0
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fi
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done
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log "Fine ALIVE [$$]"
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return 0
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}
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LIB_SG=$1
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PARALLELISM=$2
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WAIT=$((300))
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TMP='/tmp'
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LIB_CONFIG="${TMP}/lib_config.txt"
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PROCESSED_SLOTS="${TMP}/processed-slots.txt"
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PROCESSED_BARCODES="/root/processed-barcodes.txt"
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log "***** New execution *****"
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SCRIPT_DIR=$( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )
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LOG_PATH="${SCRIPT_DIR}/log"
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LOG_FILE="${LOG_PATH}/optimizer.log"
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if [ ! -d "${LOG_PATH}" ]; then
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echo "Creating the log directory: ${LOG_PATH}"
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mkdir -vp ${LOG_PATH}
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fi
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mtx -f "${LIB_SG}" status > "${LIB_CONFIG}"
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# Check if there are enough ($PARALLELISM) free drives
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if [[ $(grep "Data Transfer Element" ${LIB_CONFIG} | grep 'Empty' | wc -l) -lt "${PARALLELISM}" ]]; then
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log "ERROR. Not enough free drives. Exit."
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exit 1
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fi
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# Clean the WIP barcodes from old executions
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sed -i '/WIP/d' "${PROCESSED_BARCODES}"
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# Cleaning orphan files
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rm -rf ${TMP}/.drive*
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rm -rf ${PROCESSED_SLOTS}
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for (( i = 0 ; i < ${PARALLELISM} ; i++ )); do
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grep -q "Data Transfer Element ${i}:Empty" ${LIB_CONFIG}
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if [[ $(echo $?) == '0' ]]; then
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if [[ ! -f "${TMP}/.drive${i}.ready" ]]; then
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log "Creating file ${TMP}/.drive${i}.ready"
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touch "${TMP}/.drive${i}.ready"
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fi
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fi
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done
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# List full slots
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SLOTS_FULL="${TMP}/slots_full.txt"
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grep 'Storage Element' ${LIB_CONFIG} | grep 'Full' | grep -v IMPORT | grep -v CLN | grep -v "(" > ${SLOTS_FULL}
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COUNT=1
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OFS=$IFS
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IFS="
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"
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while [ $COUNT -le $(cat ${SLOTS_FULL} | wc -l) ]; do
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RUNNING=$(ls -1q ${TMP}/.drive*.lock | wc -l)
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if [[ "${RUNNING}" -lt "${PARALLELISM}" ]]; then
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SLOT=$(sed "${COUNT}q;d" ${SLOTS_FULL} | awk '{print $3;}' | cut -d ':' -f 1)
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BARCODE=$(sed "${COUNT}q;d" ${SLOTS_FULL} | awk '{print $4;}' | cut -d '=' -f 2)
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grep -q "${SLOT}" "${PROCESSED_SLOTS}" #Controllo che lo slot non sia stato già processato
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if [[ $(echo $?) == '0' ]]; then
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echo "Slot ${SLOT} already processed."
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((COUNT++))
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continue
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fi
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grep -q "${BARCODE};OK" "${PROCESSED_BARCODES}" #Controllo che il barcode non sia già stato processato
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if [[ $(echo $?) == '0' ]]; then
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echo "Barcode ${BARCODE} already processed. Skip."
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((COUNT++))
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continue
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fi
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log "### SLOT ${SLOT} - BARCODE ${BARCODE}"
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for (( i = 0 ; i < ${PARALLELISM} ; i++ )); do # Look for an available drive
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#log "scelta drive - ciclo numero ${i}"
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if [ -f "${TMP}/.drive${i}.ready" ]; then # Look for "ready" file
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DRIVE=${i}
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mv "${TMP}/.drive${DRIVE}.ready" "${TMP}/.drive${DRIVE}.lock"
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break
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fi
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done
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log "Load slot ${SLOT} into drive ${DRIVE}."
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mtx -f "${LIB_SG}" load "${SLOT}" "${DRIVE}"
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echo "${BARCODE};drive${DRIVE};WIP" >> "${PROCESSED_BARCODES}" # Barcode WIP
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echo ${SLOT} >> "${PROCESSED_SLOTS}"
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log "Lancio ALIVE con parametri: ${LIB_SG} - ${SLOT} - ${DRIVE} - ${BARCODE}"
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alive "${LIB_SG}" "${SLOT}" "${DRIVE}" "${BARCODE}" &
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RUNNING=$(ls -1q ${TMP}/.drive*.lock | wc -l)
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log "MAIN - RUNNING processes: $RUNNING"
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if [[ "${RUNNING}" -ge "${PARALLELISM}" ]]; then
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log "MAIN (if) - Massimo Parallelismo. Aspetto ${WAIT} secondi."
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sleep "${WAIT}"
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else
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((COUNT++))
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log "Waiting 2 minutes to avoid too many commands."
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sleep 120
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fi
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else
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log "MAIN - Maximum parallelism. Waiting ${WAIT} seconds."
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sleep "${WAIT}"
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fi
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done
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IFS=$OFS
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rm -rf "${LIB_CONFIG}"
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rm -rf "${SLOTS_FULL}"
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rm -rf "${PROCESSED_SLOTS}"
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log "***** End execution *****\n\n"
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