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added ability to disable passes tracking

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Markus Ressel 2020-07-30 17:45:43 +02:00
parent 3d02d6c274
commit b258b6aa3b
2 changed files with 23 additions and 17 deletions
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2
README.md
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@ -58,7 +58,7 @@ chmod +x ./zfs-inplace-rebalancing.sh
| Name | Description | Default |
|-----------|-------------|---------|
| -checksum | Whether to compare the copy using an **MD5** checksum | `true` |
| -passes | The maximum number of rebalance passes per file | `1` |
| -passes | The maximum number of rebalance passes per file. Setting this to infinity by using a value `<= 0` might improve performance when rebalancing a lot of small files. | `1` |
### Example

38
zfs-inplace-rebalancing.sh
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@ -60,11 +60,13 @@ function rebalance () {
progress_percent=$(echo "scale=2; ${current_index}*100/${file_count}" | bc)
color_echo "${Cyan}" "Progress -- Files: ${current_index}/${file_count} (${progress_percent}%)"
# check if target rebalance count is reached
rebalance_count=$(get_rebalance_count "${file_path}")
if [ "${rebalance_count}" -ge "${passes_flag}" ]; then
color_echo "${Yellow}" "Rebalance count (${passes_flag}) reached, skipping: ${file_path}"
return
if [ "${passes_flag}" -ge 1 ]; then
# check if target rebalance count is reached
rebalance_count=$(get_rebalance_count "${file_path}")
if [ "${rebalance_count}" -ge "${passes_flag}" ]; then
color_echo "${Yellow}" "Rebalance count (${passes_flag}) reached, skipping: ${file_path}"
return
fi
fi
tmp_extension=".balance"
@ -149,16 +151,18 @@ function rebalance () {
echo "Renaming temporary copy to original '${file_path}'..."
mv "${tmp_file_path}" "${file_path}"
# update rebalance "database"
line_nr=$(grep -n "${file_path}" "./${rebalance_db_file_name}" | head -n 1 | cut -d: -f1)
if [ -z "${line_nr}" ]; then
rebalance_count=1
echo "${file_path}" >> "./${rebalance_db_file_name}"
echo "${rebalance_count}" >> "./${rebalance_db_file_name}"
else
rebalance_count_line_nr="$((line_nr + 1))"
rebalance_count="$((rebalance_count + 1))"
sed -i "${rebalance_count_line_nr}s/.*/${rebalance_count}/" "./${rebalance_db_file_name}"
if [ "${passes_flag}" -ge 1 ]; then
# update rebalance "database"
line_nr=$(grep -n "${file_path}" "./${rebalance_db_file_name}" | head -n 1 | cut -d: -f1)
if [ -z "${line_nr}" ]; then
rebalance_count=1
echo "${file_path}" >> "./${rebalance_db_file_name}"
echo "${rebalance_count}" >> "./${rebalance_db_file_name}"
else
rebalance_count_line_nr="$((line_nr + 1))"
rebalance_count="$((rebalance_count + 1))"
sed -i "${rebalance_count_line_nr}s/.*/${rebalance_count}/" "./${rebalance_db_file_name}"
fi
fi
}
@ -202,7 +206,9 @@ file_count=$(find "${root_path}" -type f | wc -l)
color_echo "$Cyan" " File count: ${file_count}"
# create db file
touch "./${rebalance_db_file_name}"
if [ "${passes_flag}" -ge 1 ]; then
touch "./${rebalance_db_file_name}"
fi
# recursively scan through files and execute "rebalance" procedure
find "$root_path" -type f -print0 | while IFS= read -r -d '' file; do rebalance "$file"; done