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|
#!/usr/bin/env bash
# Copyright 2010-2012 Thomas Schoebel-Theuer / 1&1 Internet AG
#
# Email: tst@1und1.de
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
#####################################################################
# Create derived loads from original loads.
#
# The original loads "$@" are split into snippets having length $window each.
# The snippets are sorted according to IOPS and distributed to
# 0..($max-1) output files in a round-robin fashion, where
# max is iterating through the list $split_list.
#
# The rationale is explained at
# http://www.blkreplay.org/loads/natural/1and1/natural-derived/00README
#
# TST 2012-06-03
# check some preconditions
noecho=1
script_dir="$(cd "$(dirname "$(which "$0")")"; pwd)"
source "$script_dir/modules/lib.sh" || exit $?
check_list="gzip gunzip grep sed gawk cut"
check_installed "$check_list"
window=${window:-300}
split_list=${split_list:-001 002 004 008 016 032 064 128}
function paste_together
{
gawk -F";" 'BEGIN{ old = 0.0; offset = 0.0; } { if ($1 < old) { offset += old; } printf("%17.9f ;%s;%s;%s;%s;%s\n", $1 + offset, $2, $3, $4, $5, $6); old = $1; }'
}
function from_start
{
gawk -F";" 'BEGIN{ offset = -1; } { if (offset < 0) { offset = $1; } printf("%17.9f ;%s;%s;%s;%s;%s\n", $1 - offset, $2, $3, $4, $5, $6); }'
}
tmp="${TMPDIR:-/tmp}/snippets.$$"
mkdir -p $tmp/s || exit $?
echo "Creating snippets. This may take a long time...." 1>&2
limit=$window
snippet=0
total=0
cat "$@" |\
gunzip -f |\
grep ";" |\
grep -v "[a-z]" |\
paste_together |\
{
count=0
while true; do
while IFS="." read time rest; do
if (( time >= limit )); then
break;
fi
echo "$time.$rest"
(( count++ ))
done >> $tmp/xxx
if [ -z "$time" ]; then
break
fi
(( iops = count / window ))
echo " snippet $snippet at $limit has $count requests ($iops IOPS)" 1>&2
(( total += count ))
from_start < $tmp/xxx > $tmp/s/$count.$snippet
rm -f $tmp/xxx
(( snippet++ ))
(( limit += window ))
echo "$time.$rest" > $tmp/xxx
count=1
done
echo "------------------------------------------------" 1>&2
echo "snippets : $snippet" 1>&2
echo "reworked lines: $total" 1>&2
echo "rest lines: $count" 1>&2
echo "sum lines: $(( total + count ))" 1>&2
echo "average IOPS : $(( total / snippet / window ))" 1>&2
echo "------------------------------------------------" 1>&2
}
base="$(basename "$1" | sed 's/\.\(load\|gz\|[0-9]\+\)//g')"
for max in $split_list; do
max_num=$(echo $max | sed 's/^0*//')
dir="${base}.derived.split.$max"
mkdir -p "$dir" || exit $?
echo "------------------------------------------------" 1>&2
echo "Splitting into $max:" 1>&2
for i in $(eval "echo {0..$(($max_num - 1))}"); do
out[i]="$(printf "$base.derived.%03d.of.$max_num.load.gz" $i)"
list[i]=""
done
j=0
for i in $( (cd $tmp/s && ls) | sort -n -r ); do
#echo "$i => $j" 1>&2
list[j]="${list[j]} $i"
(( j = (j + 1) % max_num ))
done
for i in $(eval "echo {0..$(($max_num - 1))}"); do
[ -z "${list[i]}" ] && continue
echo "${out[i]} ${list[i]}" 1>&2
(
echo_copyright "$(basename "$1")..."
echo "start ; sector; length ; op ; replay_delay ; replay_duration"
cd $tmp/s
cat ${list[i]} | paste_together
) | gzip -8 > "$dir/${out[i]}" &
done
echo "Waiting for termination of subprocesses...." 1>&2
wait
done
rm -rf $tmp
|
