AWK file reformatting - linux

Question

I'm struggling to reformat a comma separated file using awk. The file contains minute data for a day for multiple servers and for multiple metrics
e.g 2 records, per minute, per server for 24hrs
Example input file:
server01,00:01:00,AckDelayAverage,9999
server01,00:01:00,AckDelayMax,8888
server01,00:02:00,AckDelayAverage,666
server01,00:02:00,AckDelayMax,5555
.....
server01,23:58:00,AckDelayAverage,4545
server01,23:58:00,AckDelayMax,8777
server01,23:59:00,AckDelayAverage,4686
server01,23:59:00,AckDelayMax,7820
server02,00:01:00,AckDelayAverage,1231
server02,00:01:00,AckDelayMax,4185
server02,00:02:00,AckDelayAverage,1843
server02,00:02:00,AckDelayMax,9982
.....
server02,23:58:00,AckDelayAverage,1022
server02,23:58:00,AckDelayMax,1772
server02,23:59:00,AckDelayAverage,1813
server02,23:59:00,AckDelayMax,9891
I'm trying to re-format the file to have a single row for each minute with a unique concatenation of fields 1 & 3 as the column headers
e.g the expected output file would look like:
Minute, server01-AckDelayAverage,server01-AckDelayMax, server02-AckDelayAverage,server02-AckDelayMax
00:01:00,9999,8888,1231,4185
00:02:00,666,5555,1843,8892
...
...
23:58:00,4545,8777,1022,1772
23:59:00,4686,7820,1813,9891

Answer 1

A solution using GNU awk. Call this as awk -F, -f script input_file:
/Average/ { average[$2, $1] = $4; }
/Max/ { maximum[$2, $1] = $4; }
{
if (!($2 in minutes)) {
minutes[$2] = 1;
}
if (!($1 in servers)) {
servers[$1] = 1;
}
}
END {
mcount = asorti(minutes, smin);
scount = asorti(servers, sserv);
printf "minutes";
for (col = 1; col <= scount; col++) {
printf "," sserv[col] "-average," sserv[col] "-maximum";
}
print "";
for (row = 1; row <= mcount; row++) {
key = smin[row];
printf key;
for (col = 1; col <= scount; col++) {
printf "," average[key, sserv[col]] "," maximum[key, sserv[col]];
}
print "";
}
}

Answer 2

run awk command : ./script.awk file
#! /bin/awk -f
BEGIN{
FS=",";
OFS=","
}
$1 ~ /server01/ && $3 ~ /Average/{
a[$2]["Avg01"] = $4;
}
$1 ~ /server01/ && $3 ~ /Max/{
a[$2]["Max01"] = $4;
}
$1 ~ /server02/ && $3 ~ /Average/{
a[$2]["Avg02"] = $4;
}
$1 ~ /server02/ && $3 ~ /Max/{
a[$2]["Max02"] = $4;
}
END{
print "Minute","server01-AckDelayAverage","server01-AckDelayMax","server02-AckDelayAverage","server02-AckDelayMax"
for(i in a){
print i,a[i]["Avg01"],a[i]["Max01"],a[i]["Avg02"],a[i]["Max02"] | "sort"
}
}

Answer 3

With awk and sort:
awk -F, -v OFS=, '{
a[$2]=(a[$2]?a[$2]","$4:$4)
}
END{
for ( i in a ) print i,a[i]
}' File | sort
If $4 has 0 values:
awk -F, -v OFS=, '!a[$2]{a[$2]=$2} {a[$2]=a[$2]","$4} END{for ( i in a ) print a[i]}' | sort
!a[$2]{a[$2]=$2}: If array with a with Index $2 ( the time in Minute) doesn't exit, array a with index as $2( the time in Minute) with value as $2 is created. True when Minute entry first time occurs in line.
{a[$2]=a[$2]","$4}: Concatenate value $4 to this array
END: Print all values of in array a
Finally pipe this awk result to sort.