Forza/dm-cache
Forza/dm-cache
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Forza 2023-11-26 15:36:18 +01:00
parent 74e76953c7
commit 2a119353c3
1 changed files with 36 additions and 24 deletions
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60
cachestats.sh
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@ -13,6 +13,27 @@ declare -i sizess
declare status_output
declare -a dmstatus
# Function to convert bytes to IEC units
to_iec() {
local bytes kib mib gib tib
bytes=$1
kib=$(( (bytes + 512) / 1024 ))
mib=$(( (kib + 512) / 1024 ))
gib=$(( (mib + 512) / 1024 ))
tib=$(( (gib + 512) / 1024 ))
if [ $tib -gt 0 ]; then
echo "${tib} TiB"
elif [ $gib -gt 0 ]; then
echo "${gib} GiB"
elif [ $mib -gt 0 ]; then
echo "${mib} MiB"
elif [ $kib -gt 0 ]; then
echo "${kib} KiB"
else
echo "${bytes} bytes"
fi
}
# Get the status output using dmsetup
status_output=$(dmsetup status "$device_name" 2>/dev/null)
@ -84,40 +105,31 @@ if [ -n "$status_output" ]; then
# done |sort
# Output defined fields
printf "\n"
printf "DEVICE\n"
printf "========\n"
printf "%-*s%s\n" "30" "Device-mapper device: " "${data[name]}"
printf "%-*s%s\n" "30" "Origin size: " "$(( ${data[origin_length]} - ${data[origin_start]} )) bytes"
printf "%-*s%s\n" "30" "Discards: " "${data[discard_passdown]}"
printf "%-*s%s\n" "26" "Device-mapper name: " "/dev/mapper/${data[name]}"
printf "%-*s%s\n" "26" "Origin size: " "$(to_iec $(( ${data[origin_length]} - ${data[origin_start]} )) )"
printf "%-*s%s\n" "26" "Discards: " "${data[discard_passdown]}"
printf "\n"
printf "CACHE\n"
printf "========\n"
printf "%-*s%s\n" "30" "Cache Size: " "$(( ${data[total_cache_blocks]} * ${data[cache_block_size]} )) bytes"
printf "%-*s%s\n" "30" "Cache Usage: " "$(( ${data[used_cache_blocks]} * ${data[cache_block_size]} )) bytes"
printf "%-*s%s\n" "30" "Cache Usage: " "$(( 100 * ${data[used_cache_blocks]} / ${data[total_cache_blocks]} )) %"
printf "%-*s%s\n" "30" "Cache Read Hit: " "${data[read_hits]}"
printf "%-*s%s\n" "30" "Cache Read Miss: " "${data[read_misses]}"
printf "%-*s%s\n" "30" "Cache Write Hit: " "${data[write_hits]}"
printf "%-*s%s\n" "30" "Cache Write Miss: " "${data[write_misses]}"
printf "%-*s%s\n" "30" "Cache Dirty: " "${data[dirty_cache]} bytes"
printf "%-*s%s\n" "30" "Cache Block Size: " "${data[cache_block_size]} bytes"
printf "%-*s%s\n" "30" "Cache Promotions: " "${data[promotions]}"
printf "%-*s%s\n" "30" "Cache Demotions: " "${data[demotions]}"
printf "%-*s%s\n" "30" "Cache Migration Threshold: " "${data[migration_threshold]} bytes"
printf "%-*s%s\n" "30" "Cache RW mode: " "${data[cache_rw]}"
printf "%-*s%s\n" "30" "Cache Type: " "${data[cache_type]}"
printf "%-*s%s\n" "30" "Cache Policy: " "${data[cache_policy]}"
printf "%-*s%s\n" "30" "Cache Status: " "${data[status]}"
printf "%-*s%s\n" "26" "Size / Usage: " "$(to_iec $((${data[total_cache_blocks]} * ${data[cache_block_size]}))) / $(to_iec $(( ${data[used_cache_blocks]} * ${data[cache_block_size]} ))) ($(( 100 * ${data[used_cache_blocks]} / ${data[total_cache_blocks]} )) %)"
printf "%-*s%s\n" "26" "Read Hit Rate: " "${data[read_hits]} / $((${data[read_misses]} + ${data[read_hits]})) ($(( 100 * ${data[read_hits]} / (${data[read_hits]} + ${data[read_misses]}) )) %)"
printf "%-*s%s\n" "26" "Write Hit Rate: " "${data[write_hits]} / $((${data[write_misses]} + ${data[write_hits]})) ($(( 100 * ${data[write_hits]} / (${data[write_hits]} + ${data[write_misses]}) )) %)"
printf "%-*s%s\n" "26" "Dirty: " "$(to_iec ${data[dirty_cache]})"
printf "%-*s%s\n" "26" "Block Size: " "$(to_iec ${data[cache_block_size]})"
printf "%-*s%s\n" "26" "Promotions / Demotions: " "${data[promotions]} / ${data[demotions]}"
printf "%-*s%s\n" "26" "Migration Threshold: " "$(to_iec ${data[migration_threshold]})"
printf "%-*s%s\n" "26" "Read-Write mode: " "${data[cache_rw]}"
printf "%-*s%s\n" "26" "Type: " "${data[cache_type]}"
printf "%-*s%s\n" "26" "Policy: " "${data[cache_policy]}"
printf "%-*s%s\n" "26" "Status: " "${data[status]}"
printf "\n"
printf "METADATA\n"
printf "========\n"
printf "%-*s%s\n" "30" "Metadata Size: " "$(( ${data[total_metadata_blocks]} * ${data[metadata_block_size]} )) bytes"
printf "%-*s%s\n" "30" "Metadata Usage: " "$(( ${data[used_metadata_blocks]} * ${data[metadata_block_size]} )) bytes"
printf "%-*s%s\n" "30" "Metadata Usage: " "$(( 100 * ${data[used_metadata_blocks]} / ${data[total_metadata_blocks]} )) %"
printf "%-*s%s\n" "26" "Size / Usage: " "$(to_iec $(( ${data[total_metadata_blocks]} * ${data[metadata_block_size]} ))) / $(to_iec $(( ${data[used_metadata_blocks]} * ${data[metadata_block_size]} ))) ($(( 100 * ${data[used_metadata_blocks]} / ${data[total_metadata_blocks]} )) %)"
else
echo "Device not found or no valid status output."
fi