# so as to preserve 7 most recent daily, 4 most recent weekly and 12
# most recent monthly snapshots, in addition to labelled ones.
#
-# The cron bot is expected to run once an hour
+# The cron bot is expected to run once a minute
-# hourly = every hour
-# daily = .. keep one of the hourly yesterday
-# weekly = .. keep one of the daily last week
-# monthly = .. keep one of the daily last month
-
-DEV=/dev/sda5
+# The hour-of-day to preserve as daily snapshot
KEEPHH=12
+
+# The day-of-month to preserve as monthly snapshot
KEEPDD=15
+DEV=$1
+if [ -z "$DEV" ] ; then
+ DEVS=( $( mount | grep nilfs2 | sed 's/ .*//' ) )
+ DEV=${DEVS[0]}
+ if [ -z "$DEV" ] ; then
+ echo "Error* cannot find a mounted nilfs2 partition" >&2
+ exit 1
+ fi
+fi
+
FIVELY="$(date -d '-5 minutes' '+%Y-%m-%d %H:%M:%S')"
HOURLY="$(date -d '-1 hour' '+%Y-%m-%d %H:%M:%S')"
-DAILY="$(date -d '-1 days' '+%Y-%m-%d %H:%M:%S')"
-MONTHLY="$(date -d '-1 months' '+%Y-%m-%d %H:%M:%S')"
+DAILY="$(date -d '-1 day' '+%Y-%m-%d %H:%M:%S')"
+MONTHLY="$(date -d '-1 month' '+%Y-%m-%d %H:%M:%S')"
WEEKLY="$(date -d '-7 days' '+%Y-%m-%d %H:%M:%S')"
-YEARLY="$(date -d '-1 years' '+%Y-%m-%d %H:%M:%S')"
+YEARLY="$(date -d '-1 year' '+%Y-%m-%d %H:%M:%S')"
-date "+%Y-%m-%d %H:%M:%S ---- checking" >&2
-lscp -s | while read CNO DATE TIME REST ; do
- TS="$DATE $TIME"
- [ "$CNO" = "CNO" ] && continue
- if [[ ! "$TS" > "$YEARLY" ]] ; then
- if [ "$KEEPYY" = "${DATE:0:4}" ] ; then
- echo "# discard year duplicate $CNO $DATE $TIME" >&2
- chcp cp $CNO
- else
- KEEPYY="${DATE:0:4}"
- fi
- echo "# keep first of year $CNO $DATE $TIME" >&2
- continue
- fi
- # Within last year
- if [[ ! "$TS" > "$MONTHLY" ]] ; then
- if [ "$KEEPMM" = "${DATE:0:7}" ] ; then
- echo "# discard month duplicate $CNO $DATE $TIME" >&2
- chcp cp $CNO
- else
- KEEPMM="${DATE:0:7}"
- fi
+MARK=( )
+function marksnap() {
+ if [[ "${MARK[0]}" == "$1" ]] && [[ "${MARK[1]}" = "$2" ]] ; then
+ chcp cp $DEV ${MARKYEAR[2]}
fi
- # Within last month
- if [[ ! "$TS" > "$WEEKLY" ]] ; then
- if [[ "$KEEPDD" = "${DATE:8:2}" ]] ; then
- if [ -z "$KEEPWW" ] ; then
- KEEPWW="${DATE:8:2}"
- continue
- fi
- echo "# discard duplicate day $KEEPDD: $CNO $DATE $TIME" >&2
- else
- echo "# discard not day $KEEPDD: $CNO $DATE $TIME" >&2
- fi
- chcp cp $CNO
- continue
- fi
- # Within last week
- if [[ ! "$TS" > "$DAILY" ]] ; then
- [[ "$KEEPHH" = "${TIME:0:2}" ]] && continue
- echo "# discard not hour $KEEPHH: $CNO $DATE $TIME" >&2
- chcp cp $CNO
- continue
- fi
- # Within last day
- if [[ ! "$TS" > "$HOURLY" ]] ; then
- if [ "$KEEP55" = "${TIME:0:2}" ] ; then
- echo "# discard duplicate for hour $KEEP55: $CNO $DATE $TIME" >&2
- chcp cp $CNO
- else
- KEEP55="${TIME:0:2}"
- #echo "# keep first of hour $KEEP55: $CNO $DATE $TIME" >&2
- fi
- continue
- fi
- # Within last hour
- #echo "# keep within last hour $CNO $DATE $TIME" >&2
- [[ ! "$TS" > "$FIVELY" ]] && continue
- echo "$CNO $DATE $TIME is within last five minutes"
- #echo "# $CNO is within last five minutes " >&2
-done | if read X ; then
- :
-elif [[ $(( $(date +%M) % 5 )) = 0 ]] ; then
- date "+# new snapshot at %Y-%m-%d %H:%M:%S" >&2
- mkcp -s $DEV
-fi
+ MARK=( "$1" "$2" $3 )
+}
+
+{ flock 9
+
+ date "+$DEV: %Y-%m-%d %H:%M:%S ---- checking" >&2
+ lscp -s $DEV | while read CNO DATE TIME REST ; do
+ TS="$DATE $TIME"
+ [ "$CNO" = "CNO" ] && continue
+ if [[ "$TS" > "$YEARLY" ]] ; then
+ marksnap YEAR "${DATE:0:4}" $CNO
+ elif [[ "$TS" > "$MONTHLY" ]]
+ marksnap MONTH "${DATE:5:2}" $CNO
+ elif [[ "$TS" > "$WEEKLY" ]]
+ # For older than most recent week, keep last snapshot each week
+ marksnap WEEK "$(( 7${DATE:8:2} / 7 - 100 ))" $CNO
+ elif [[ "$TS" > "$DAILY" ]]
+ marksnap DAY "${DATE:8:2}" $CNO
+ elif [[ "$TS" > "$HOURLY" ]]
+ marksnap HOUR "${DATE:8:2}-${TIME:0:2}" $CNO
+ else
+ echo "$CNO $DATE $TIME within last hour"
+ fi
+ done | if read X ; then
+ : # snapshot within last hour
+ else
+ date "+$DEV: new snapshot at %Y-%m-%d %H:%M:%S" >&2
+ mkcp -s $DEV
+ fi
+} 9> /var/run/lock/sss.lock
projects / rrq / nilfs2sss.git / blobdiff