diff --git a/doc/BENCHMARKING.md b/doc/BENCHMARKING.md
index 492b2bb10..ae63ff1f4 100644
--- a/doc/BENCHMARKING.md
+++ b/doc/BENCHMARKING.md
@@ -15,7 +15,7 @@ In general, we run each IO operation for 30 seconds against a 100 GiB file. But
 
 ***readdir workload*** - we measure how long it takes to run `ls` command against directories with different size. Each directory has no subdirectory and contains a specific number of files, range from 100 to 100000 files, which we have to create manually using fio then upload them to S3 bucket before running the benchmark. The fio configuration files for creating them can be found at path [mountpoint-s3/scripts/fio/create/](../mountpoint-s3/scripts/fio/create).
 
-***write workload*** - we measure write throughput by using [dd](https://man7.org/linux/man-pages/man1/dd.1.html) command to simulate sequential write workloads. We plan to use fio in the future for consistency with other benchmarks but its current write pattern is not supported by Mountpoint. Firstly, fio creates a file with 0 byte and close it. Secondly, fio opens the file again with `O_RDWR` flag to do the IO workloads. To support fio, Mountpoint has to allow file overwrites and allow file opens with `O_RDWR` flag.
+***write workload*** - we measure write throughput by using fio to simulate sequential write workloads. The fio configuration files for write workloads can be found at path [mountpoint-s3/scripts/fio/write/](../mountpoint-s3/scripts/fio/write).
 
 ### Regression Testing
 Our CI runs the benchmark automatically for any new commits to the main branch or specific pull requests that we have reviewed and tagged with **performance** label. Every benchmark from the CI workflow will be running on `m5n.24xlarge` EC2 instances (100 Gbps network speed) with Ubuntu 22.04 in us-east-1 against a bucket in us-east-1.
diff --git a/mountpoint-s3/scripts/fio/write/seq_write.fio b/mountpoint-s3/scripts/fio/write/seq_write.fio
new file mode 100644
index 000000000..961ed3560
--- /dev/null
+++ b/mountpoint-s3/scripts/fio/write/seq_write.fio
@@ -0,0 +1,16 @@
+[global]
+name=fs_bench
+bs=256k
+runtime=30s
+time_based
+group_reporting
+
+[sequential_write]
+size=100G
+rw=write
+ioengine=sync
+fallocate=none
+create_on_open=1
+fsync_on_close=1
+unlink=1
+startdelay=30s
diff --git a/mountpoint-s3/scripts/fio/write/seq_write_direct.fio b/mountpoint-s3/scripts/fio/write/seq_write_direct.fio
new file mode 100644
index 000000000..041601516
--- /dev/null
+++ b/mountpoint-s3/scripts/fio/write/seq_write_direct.fio
@@ -0,0 +1,17 @@
+[global]
+name=fs_bench
+bs=256k
+runtime=30s
+time_based
+group_reporting
+
+[sequential_write_direct_io]
+size=100G
+rw=write
+ioengine=sync
+direct=1
+fallocate=none
+create_on_open=1
+fsync_on_close=1
+unlink=1
+startdelay=30s
diff --git a/mountpoint-s3/scripts/fs_bench.sh b/mountpoint-s3/scripts/fs_bench.sh
index d80f57555..420ea180c 100755
--- a/mountpoint-s3/scripts/fs_bench.sh
+++ b/mountpoint-s3/scripts/fs_bench.sh
@@ -33,17 +33,48 @@ results_dir=results
 runtime_seconds=30
 startdelay_seconds=30
 max_threads=4
+iteration=10
 
 rm -rf ${results_dir}
 mkdir -p ${results_dir}
 
+run_fio_job() {
+  job_file=$1
+  bench_file=$2
+  mount_dir=$3
+
+  job_name=$(basename "${job_file}")
+  job_name="${job_name%.*}"
+
+  for i in $(seq 1 $iteration);
+  do
+    fio --thread \
+      --output=${results_dir}/${job_name}_${i}.json \
+      --output-format=json \
+      --directory=${mount_dir} \
+      --filename=${bench_file} \
+      ${job_file}
+  done
+
+  # combine the results and find an average value
+  jq -n 'reduce inputs.jobs[] as $job (null; .name = $job.jobname | .len += 1 | .value += (if ($job."job options".rw == "read")
+      then $job.read.bw / 1024
+      elif ($job."job options".rw == "randread") then $job.read.bw / 1024
+      elif ($job."job options".rw == "randwrite") then $job.write.bw / 1024
+      else $job.write.bw / 1024 end)) | {name: .name, value: (.value / .len), unit: "MiB/s"}' ${results_dir}/${job_name}_*.json | tee ${results_dir}/${job_name}_parsed.json
+
+  # delete the raw output files
+  for i in $(seq 1 $iteration);
+  do
+    rm ${results_dir}/${job_name}_${i}.json
+  done
+}
+
 read_bechmark () {
   jobs_dir=mountpoint-s3/scripts/fio/read
 
   for job_file in "${jobs_dir}"/*.fio; do
     mount_dir=$(mktemp -d /tmp/fio-XXXXXXXXXXXX)
-    job_name=$(basename "${job_file}")
-    job_name="${job_name%.*}"
 
     echo "Running ${job_name}"
 
@@ -65,122 +96,45 @@ read_bechmark () {
       bench_file=${S3_BUCKET_SMALL_BENCH_FILE}
     fi
 
-    # run benchmark
-    fio --thread \
-      --output=${results_dir}/${job_name}.json \
-      --output-format=json \
-      --directory=${mount_dir} \
-      --filename=${bench_file} \
-      ${job_file}
+    # run the benchmark
+    run_fio_job $job_file $bench_file $mount_dir
 
     # unmount file system
     sudo umount ${mount_dir}
 
     # cleanup mount directory
     rm -rf ${mount_dir}
-
-    # parse result
-    jq -n 'inputs.jobs[] | if (."job options".rw == "read")
-      then {name: .jobname, value: (.read.bw / 1024), unit: "MiB/s"}
-      elif (."job options".rw == "randread") then {name: .jobname, value: (.read.bw / 1024), unit: "MiB/s"}
-      elif (."job options".rw == "randwrite") then {name: .jobname, value: (.write.bw / 1024), unit: "MiB/s"}
-      else {name: .jobname, value: (.write.bw / 1024), unit: "MiB/s"} end' ${results_dir}/${job_name}.json | tee ${results_dir}/${job_name}_parsed.json
-
-    # delete the raw output file
-    rm ${results_dir}/${job_name}.json
   done
 }
 
 write_benchmark () {
-  # mount file system
-  mount_dir=$(mktemp -d /tmp/fio-XXXXXXXXXXXX)
-  cargo run --release ${S3_BUCKET_NAME} ${mount_dir} \
-      --allow-delete \
-      --prefix=${S3_BUCKET_TEST_PREFIX} \
-      --max-threads=${max_threads}
-  mount_status=$?
-  if [ $mount_status -ne 0 ]; then
-      echo "Failed to mount file system"
-      exit 1
-  fi
-  sleep $startdelay_seconds
-  
-  ## sequential write
-  job_name="sequential_write"
-  bench_file=${mount_dir}/${job_name}_${RANDOM}.dat
-  dd if=/dev/zero of=$bench_file bs=256k conv=fsync > ${results_dir}/${job_name}.txt 2>&1 &
-  # get the process ID
-  dd_pid=$!
-
-  sleep $runtime_seconds
-  # send USR1 signal to print the result
-  kill -USR1 ${dd_pid}
-  sleep 0.1
-  kill ${dd_pid}
-
-  throughput_value=$(awk '/copied/ {print $10}' ${results_dir}/${job_name}.txt)
-  unit=$(awk '/copied/ {print $11}' ${results_dir}/${job_name}.txt)
-  # convert unit to MiB/s
-  case "$unit" in
-    GB/s)
-      throughput_value=$(awk "BEGIN {print $throughput_value*1000*1000*1000/1024/1024}")
-      ;;
-    MB/s)
-      throughput_value=$(awk "BEGIN {print $throughput_value*1000*1000/1024/1024}")
-      ;;
-    kB/s)
-      throughput_value=$(awk "BEGIN {print $throughput_value*1000/1024/1024}")
-      ;;
-  esac
-
-  json_data="{\"name\":\"$job_name\",\"value\":$throughput_value,\"unit\":\"MiB/s\"}"
-  echo $json_data | jq '.' | tee ${results_dir}/${job_name}.json
-
-  # clean up the data file and the raw output file
-  sleep 10
-  rm $bench_file ${results_dir}/${job_name}.txt
-
-
-  ## sequential write with direct IO
-  job_name="sequential_write_direct_io"
-  bench_file=${mount_dir}/${job_name}_${RANDOM}.dat
-  dd if=/dev/zero of=$bench_file bs=256k oflag=direct conv=fsync > ${results_dir}/${job_name}.txt 2>&1 &
-  # get the process ID
-  dd_pid=$!
-
-  sleep $runtime_seconds
-  # send USR1 signal to print the result
-  kill -USR1 ${dd_pid}
-  sleep 0.1
-  kill ${dd_pid}
-
-  throughput_value=$(awk '/copied/ {print $10}' ${results_dir}/${job_name}.txt)
-  unit=$(awk '/copied/ {print $11}' ${results_dir}/${job_name}.txt)
-  # convert unit to MiB/s
-  case "$unit" in
-    GB/s)
-      throughput_value=$(awk "BEGIN {print $throughput_value*1000*1000*1000/1024/1024}")
-      ;;
-    MB/s)
-      throughput_value=$(awk "BEGIN {print $throughput_value*1000*1000/1024/1024}")
-      ;;
-    kB/s)
-      throughput_value=$(awk "BEGIN {print $throughput_value*1000/1024/1024}")
-      ;;
-  esac
-
-  json_data="{\"name\":\"$job_name\",\"value\":$throughput_value,\"unit\":\"MiB/s\"}"
-  echo $json_data | jq '.' | tee ${results_dir}/${job_name}.json
-
-  # clean up the data file and the raw output file
-  sleep 10
-  rm $bench_file ${results_dir}/${job_name}.txt
-
-  # unmount file system
-  sudo umount ${mount_dir}
-
-  # cleanup mount directory
-  rm -rf ${mount_dir}
+  jobs_dir=mountpoint-s3/scripts/fio/write
+
+  for job_file in "${jobs_dir}"/*.fio; do
+    # mount file system
+    mount_dir=$(mktemp -d /tmp/fio-XXXXXXXXXXXX)
+    cargo run --release ${S3_BUCKET_NAME} ${mount_dir} \
+        --allow-delete \
+        --prefix=${S3_BUCKET_TEST_PREFIX} \
+        --max-threads=${max_threads}
+    mount_status=$?
+    if [ $mount_status -ne 0 ]; then
+        echo "Failed to mount file system"
+        exit 1
+    fi
+
+    # set bench file
+    bench_file=${mount_dir}/${job_name}_${RANDOM}.dat
+
+    # run the benchmark
+    run_fio_job $job_file $bench_file $mount_dir
+
+    # unmount file system
+    sudo umount ${mount_dir}
+
+    # cleanup mount directory
+    rm -rf ${mount_dir}
+  done
 }
 
 read_bechmark