Speed up Gziping of backup (#3623)

Changed Gzip compression level to default (-6)

helper-scripts/backup_and_restore.sh

@@ -81,32 +81,32 @@ function backup() {
       docker run --name mailcow-backup --rm \
         -v ${BACKUP_LOCATION}/mailcow-${DATE}:/backup \
         -v $(docker volume ls -qf name=${CMPS_PRJ}_vmail-vol-1):/vmail:ro \
-        ${DEBIAN_DOCKER_IMAGE} /bin/tar --warning='no-file-ignored' --use-compress-program="gzip --rsyncable --best" -Pcvpf /backup/backup_vmail.tar.gz /vmail
+        ${DEBIAN_DOCKER_IMAGE} /bin/tar --warning='no-file-ignored' --use-compress-program="gzip --rsyncable" -Pcvpf /backup/backup_vmail.tar.gz /vmail
       ;;&
     crypt|all)
       docker run --name mailcow-backup --rm \
         -v ${BACKUP_LOCATION}/mailcow-${DATE}:/backup \
         -v $(docker volume ls -qf name=${CMPS_PRJ}_crypt-vol-1):/crypt:ro \
-        ${DEBIAN_DOCKER_IMAGE} /bin/tar --warning='no-file-ignored' --use-compress-program="gzip --rsyncable --best" -Pcvpf /backup/backup_crypt.tar.gz /crypt
+        ${DEBIAN_DOCKER_IMAGE} /bin/tar --warning='no-file-ignored' --use-compress-program="gzip --rsyncable" -Pcvpf /backup/backup_crypt.tar.gz /crypt
       ;;&
     redis|all)
       docker exec $(docker ps -qf name=redis-mailcow) redis-cli save
       docker run --name mailcow-backup --rm \
         -v ${BACKUP_LOCATION}/mailcow-${DATE}:/backup \
         -v $(docker volume ls -qf name=${CMPS_PRJ}_redis-vol-1):/redis:ro \
-        ${DEBIAN_DOCKER_IMAGE} /bin/tar --warning='no-file-ignored' --use-compress-program="gzip --rsyncable --best" -Pcvpf /backup/backup_redis.tar.gz /redis
+        ${DEBIAN_DOCKER_IMAGE} /bin/tar --warning='no-file-ignored' --use-compress-program="gzip --rsyncable" -Pcvpf /backup/backup_redis.tar.gz /redis
       ;;&
     rspamd|all)
       docker run --name mailcow-backup --rm \
         -v ${BACKUP_LOCATION}/mailcow-${DATE}:/backup \
         -v $(docker volume ls -qf name=${CMPS_PRJ}_rspamd-vol-1):/rspamd:ro \
-        ${DEBIAN_DOCKER_IMAGE} /bin/tar --warning='no-file-ignored' --use-compress-program="gzip --rsyncable --best" -Pcvpf /backup/backup_rspamd.tar.gz /rspamd
+        ${DEBIAN_DOCKER_IMAGE} /bin/tar --warning='no-file-ignored' --use-compress-program="gzip --rsyncable" -Pcvpf /backup/backup_rspamd.tar.gz /rspamd
       ;;&
     postfix|all)
       docker run --name mailcow-backup --rm \
         -v ${BACKUP_LOCATION}/mailcow-${DATE}:/backup \
         -v $(docker volume ls -qf name=${CMPS_PRJ}_postfix-vol-1):/postfix:ro \
-        ${DEBIAN_DOCKER_IMAGE} /bin/tar --warning='no-file-ignored' --use-compress-program="gzip --rsyncable --best" -Pcvpf /backup/backup_postfix.tar.gz /postfix
+        ${DEBIAN_DOCKER_IMAGE} /bin/tar --warning='no-file-ignored' --use-compress-program="gzip --rsyncable" -Pcvpf /backup/backup_postfix.tar.gz /postfix
       ;;&
     mysql|all)
       SQLIMAGE=$(grep -iEo '(mysql|mariadb)\:.+' ${COMPOSE_FILE})
@@ -124,7 +124,7 @@ function backup() {
           ${SQLIMAGE} /bin/sh -c "mariabackup --host mysql --user root --password ${DBROOT} --backup --rsync --target-dir=/backup_mariadb ; \
           mariabackup --prepare --target-dir=/backup_mariadb ; \
           chown -R mysql:mysql /backup_mariadb ; \
-          /bin/tar --warning='no-file-ignored' --use-compress-program='gzip --rsyncable --best' -Pcvpf /backup/backup_mariadb.tar.gz /backup_mariadb ;"
+          /bin/tar --warning='no-file-ignored' --use-compress-program='gzip --rsyncable' -Pcvpf /backup/backup_mariadb.tar.gz /backup_mariadb ;"
       fi
       ;;&
     --delete-days)