diff --git a/wGRR b/wGRR
index f84cfc6b6ff30571025422e077e17b580fdaf4fd..aa076305ccdf2f7dafbdc5dd86d79529ceb0d1f7 100755
--- a/wGRR
+++ b/wGRR
@@ -19,7 +19,7 @@ display_usage() {
 	echo "${bold}USAGE:${normal} $ZSH_ARGZERO -f <fasta_file> [OPTIONS]"
 	echo ""
 	echo "${bold}MANDATORY PARAMETERS:${normal}"
-	echo "   -f <string>       fasta file with all proteins of all the compared genetic elements."
+	echo "   -i <string>       fasta file with all proteins of all the compared genetic elements."
 	echo "                        All identifiers must be formatted as:"
 	echo "                          >element_identifier_XXX"
 	echo "                     	  where XXX is a serie of numbers unique for each protein of each element."
@@ -44,6 +44,8 @@ display_usage() {
 	echo "                        Only applicable to Maestro, for the wGRR calculation step."
 	echo "                        default: not set"
 	echo "   -T                Test run. Useful to get stats on the input file and correctly set the -a parameter."
+	echo "   -f                In sbatch mode, will use the fast QOS (jobs limited to 2 hours)"
+	echo "                         Warning: be sure the jobs will run under 2 hours otherwise they will fail."
 	echo ""
 	echo "${bold}DESCRIPTION:${normal}"
 	echo "This pipeline will do all proteins pairwise comparisons using the MMseqs2 software and then process "
@@ -90,7 +92,7 @@ textifyDuration() {
 }
 
 ## parameters initialization
-PRT="N.O.P.R.T"           ## -f
+PRT="N.O.P.R.T"           ## -i
 MMPATH="N.O.P.A.T.H"      ## -p
 OUT="N.O.O.U.T"           ## -o
 THREADS=1                 ## -t
@@ -102,17 +104,19 @@ MMS_DEF_MAX_SEQS=300
 MIDENT=0
 MMS_MAX_SEQ_PARAM=""
 TESTRUN=0                 ## -T
+FAST=0                    ## -f
 
 ## catch option values
-while getopts :Tf:p:o:t:a:m: option ; do
+while getopts :fTi:p:o:t:a:m: option ; do
    case $option in
-   f) PRT="$OPTARG";     if [ ! -f $PRT ]; then echo "[ERROR]     --  fasta file '$PRT' not found (option -f)." ; exit 1 ; fi ;;
+   i) PRT="$OPTARG";     if [ ! -f $PRT ]; then echo "[ERROR]     --  fasta file '$PRT' not found (option -f)." ; exit 1 ; fi ;;
    p) MMPATH="$OPTARG"          ;;
    o) OUT="$OPTARG";     if [ -f "$OUT".wgrr.final.txt ]; then echo "[ERROR]     --  file $OUT.wgrr.final.txt already exists. Change option -o or remove this file and relaunch." ; exit 1 ; fi ;;
 	t) THREADS="$OPTARG"; if [[ ! $THREADS =~ ^[0-9]+$ ]]; then echo "[ERROR]     --  number of threads $THREADS must be an integer (option -t)." ; exit 1 ; fi ;;
 	a) ARRAYSIZE="$OPTARG"; if [[ ! $ARRAYSIZE =~ ^[0-9]+$ ]]; then echo "[ERROR]     --  number of genomes comparisons $ARRAYSIZE must be an integer (option -a)." ; exit 1 ; fi ;;
 	m) MAXJOBS="$OPTARG"; if [[ ! $MAXJOBS =~ ^[0-9]+$ ]]; then echo "[ERROR]     --  max number of simulteaneous jobs $MAXJOBS must be an integer (option -m)." ; exit 1 ; fi ;;
 	T) TESTRUN=1 ;;
+	f) FAST=1 ;;
    :) echo "option $OPTARG : missing argument" ; exit 1  ;;
    \?) echo "$OPTARG : invalid option" ; exit 1  ;;
    esac
@@ -321,6 +325,9 @@ else
 	else
 		JOBARRAY="1-${NJOBS}"
 	fi
+	if [[ $FAST == 1 ]] ; then
+		PARTITION="fast,dedicated"
+	fi
 	JID=$(sbatch --parsable --wait -p "$PARTITION" --array="$JOBARRAY" -c 1 -J "wGRR_worker" --mem=$REQMEM --wrap="./wGRR_worker.zsh $ARRAYSIZE $OUT $NJOBS 1 $PRT $tmp")
 	PQT=$(sacct -X -j $JID -o Reserved -n | awk 'NR==1{prevt=0}{t=0;n=split($1,a,"-");if(n>1){t=t+a[1]*86400};split(a[n],b,":");t=t+b[1]*3600+b[2]*60+b[3];if(t<prevt){tt=tt+prevt}prevt=t}END{print tt+t}')
 	printf "%-10s  --  %s %s %s %s %s\n" "[INFO]" "The job" $JID "has been" $(textifyDuration $PQT) "in queue" | tee -a ${OUT}.wgrr.log