●●●
[root@macbook ~]# lvs vg_banana
  LV        VG        Attr       LSize   Pool  Origin Data%  Meta%  Move Log Cpy%Sync Convert
  lv_banana vg_banana Vwi-aotz--  20.00g pool0        0.32
  pool0     vg_banana twi-aotz-- 152.95g              0.04   10.44
[root@macbook ~]# ls -l /mnt/test/
total 0



●●●スナップ無し
NAME=thin_random_1st
fio --name=$NAME --ioengine=libaio --direct=1 --directory=/mnt/test --size=128m --bs=4k   --readwrite=randwrite > ~/$(date +%Y%m%d.%H%M%S).$NAME.randwrite.txt;     echo $?
fio --name=$NAME --ioengine=libaio --direct=1 --directory=/mnt/test --size=128m --bs=4k   --readwrite=randread  > ~/$(date +%Y%m%d.%H%M%S).$NAME.randread.txt;      echo $?

[root@macbook ~]# ls -lh /mnt/test/
total 128M
-rw-r--r--. 1 root root 128M Mar  3 09:49 thin_random_1st.0.0

[root@macbook ~]# egrep 'write:|read:' *txt | awk '{print $1,$4}'
20260303.094938.thin_random_1st.randwrite.txt: BW=10.3MiB/s
20260303.095003.thin_random_1st.randread.txt: BW=20.0MiB/s

●●●スナップ１つ
[root@macbook ~]# lvcreate --snapshot --name lv_banana_ss_1 vg_banana/lv_banana
  Logical volume "lv_banana_ss_1" created.
[root@macbook ~]# lvs vg_banana
  LV             VG        Attr       LSize   Pool  Origin    Data%  Meta%  Move Log Cpy%Sync Convert
  lv_banana      vg_banana Vwi-aotz--  20.00g pool0           0.95
  lv_banana_ss_1 vg_banana Vwi---tz-k  20.00g pool0 lv_banana
  pool0          vg_banana twi-aotz-- 152.95g                 0.12   10.46


NAME=thin_random_2nd
fio --name=$NAME --ioengine=libaio --direct=1 --directory=/mnt/test --size=128m --bs=4k   --readwrite=randwrite > ~/$(date +%Y%m%d.%H%M%S).$NAME.randwrite.txt;     echo $?
fio --name=$NAME --ioengine=libaio --direct=1 --directory=/mnt/test --size=128m --bs=4k   --readwrite=randread  > ~/$(date +%Y%m%d.%H%M%S).$NAME.randread.txt;      echo $?

[root@macbook ~]# ls -lh /mnt/test/
total 256M
-rw-r--r--. 1 root root 128M Mar  3 09:49 thin_random_1st.0.0
-rw-r--r--. 1 root root 128M Mar  3 09:53 thin_random_2nd.0.0

[root@macbook ~]# egrep 'write:|read:' *txt | awk '{print $1,$4}'
20260303.094938.thin_random_1st.randwrite.txt: BW=10.3MiB/s
20260303.095003.thin_random_1st.randread.txt: BW=20.0MiB/s
20260303.095309.thin_random_2nd.randwrite.txt: BW=15.3MiB/s
20260303.095348.thin_random_2nd.randread.txt: BW=18.8MiB/s


●●●スナップ２つ
[root@macbook ~]# lvcreate --snapshot --name lv_banana_ss_2 vg_banana/lv_banana
  Logical volume "lv_banana_ss_2" created.
[root@macbook ~]# lvs vg_banana
  LV             VG        Attr       LSize   Pool  Origin    Data%  Meta%  Move Log Cpy%Sync Convert
  lv_banana      vg_banana Vwi-aotz--  20.00g pool0           1.58
  lv_banana_ss_1 vg_banana Vwi---tz-k  20.00g pool0 lv_banana
  lv_banana_ss_2 vg_banana Vwi---tz-k  20.00g pool0 lv_banana
  pool0          vg_banana twi-aotz-- 152.95g                 0.21   10.50


NAME=thin_random_3rd
fio --name=$NAME --ioengine=libaio --direct=1 --directory=/mnt/test --size=128m --bs=4k   --readwrite=randwrite > ~/$(date +%Y%m%d.%H%M%S).$NAME.randwrite.txt;     echo $?
fio --name=$NAME --ioengine=libaio --direct=1 --directory=/mnt/test --size=128m --bs=4k   --readwrite=randread  > ~/$(date +%Y%m%d.%H%M%S).$NAME.randread.txt;      echo $?

[root@macbook ~]# ls -lh /mnt/test/
total 384M
-rw-r--r--. 1 root root 128M Mar  3 09:49 thin_random_1st.0.0
-rw-r--r--. 1 root root 128M Mar  3 09:53 thin_random_2nd.0.0
-rw-r--r--. 1 root root 128M Mar  3 09:57 thin_random_3rd.0.0
[root@macbook ~]# lvs vg_banana
  LV             VG        Attr       LSize   Pool  Origin    Data%  Meta%  Move Log Cpy%Sync Convert
  lv_banana      vg_banana Vwi-aotz--  20.00g pool0           2.20
  lv_banana_ss_1 vg_banana Vwi---tz-k  20.00g pool0 lv_banana
  lv_banana_ss_2 vg_banana Vwi---tz-k  20.00g pool0 lv_banana
  pool0          vg_banana twi-aotz-- 152.95g                 0.29   10.55
[root@macbook ~]#


[root@macbook ~]# egrep 'write:|read:' *txt | awk '{print $1,$4}'
20260303.094938.thin_random_1st.randwrite.txt: BW=10.3MiB/s
20260303.095003.thin_random_1st.randread.txt: BW=20.0MiB/s
20260303.095309.thin_random_2nd.randwrite.txt: BW=15.3MiB/s
20260303.095348.thin_random_2nd.randread.txt: BW=18.8MiB/s
20260303.095726.thin_random_3rd.randwrite.txt: BW=10.7MiB/s
20260303.095750.thin_random_3rd.randread.txt: BW=14.6MiB/s


●●●スナップ３つ

[root@macbook ~]# lvcreate --snapshot --name lv_banana_ss_3 vg_banana/lv_banana
  Logical volume "lv_banana_ss_3" created.
[root@macbook ~]# lvs vg_banana
  LV             VG        Attr       LSize   Pool  Origin    Data%  Meta%  Move Log Cpy%Sync Convert
  lv_banana      vg_banana Vwi-aotz--  20.00g pool0           2.20
  lv_banana_ss_1 vg_banana Vwi---tz-k  20.00g pool0 lv_banana
  lv_banana_ss_2 vg_banana Vwi---tz-k  20.00g pool0 lv_banana
  lv_banana_ss_3 vg_banana Vwi---tz-k  20.00g pool0 lv_banana
  pool0          vg_banana twi-aotz-- 152.95g                 0.29   10.55


NAME=thin_random_4th
fio --name=$NAME --ioengine=libaio --direct=1 --directory=/mnt/test --size=128m --bs=4k   --readwrite=randwrite > ~/$(date +%Y%m%d.%H%M%S).$NAME.randwrite.txt;     echo $?
fio --name=$NAME --ioengine=libaio --direct=1 --directory=/mnt/test --size=128m --bs=4k   --readwrite=randread  > ~/$(date +%Y%m%d.%H%M%S).$NAME.randread.txt;      echo $?



[root@macbook ~]# ls -lh /mnt/test/
total 512M
-rw-r--r--. 1 root root 128M Mar  3 09:49 thin_random_1st.0.0
-rw-r--r--. 1 root root 128M Mar  3 09:53 thin_random_2nd.0.0
-rw-r--r--. 1 root root 128M Mar  3 09:57 thin_random_3rd.0.0
-rw-r--r--. 1 root root 128M Mar  3 10:01 thin_random_4th.0.0
[root@macbook ~]# egrep 'write:|read:' *txt | awk '{print $1,$4}'
20260303.094938.thin_random_1st.randwrite.txt: BW=10.3MiB/s
20260303.095003.thin_random_1st.randread.txt: BW=20.0MiB/s
20260303.095309.thin_random_2nd.randwrite.txt: BW=15.3MiB/s
20260303.095348.thin_random_2nd.randread.txt: BW=18.8MiB/s
20260303.095726.thin_random_3rd.randwrite.txt: BW=10.7MiB/s
20260303.095750.thin_random_3rd.randread.txt: BW=14.6MiB/s
20260303.100125.thin_random_4th.randwrite.txt: BW=11.6MiB/s
20260303.100143.thin_random_4th.randread.txt: BW=15.6MiB/s
[root@macbook ~]#


●●●スナップ４つ
[root@macbook ~]# lvcreate --snapshot --name lv_banana_ss_4 vg_banana/lv_banana
  Logical volume "lv_banana_ss_4" created.
[root@macbook ~]# lvs vg_banana
  LV             VG        Attr       LSize   Pool  Origin    Data%  Meta%  Move Log Cpy%Sync Convert
  lv_banana      vg_banana Vwi-aotz--  20.00g pool0           2.83
  lv_banana_ss_1 vg_banana Vwi---tz-k  20.00g pool0 lv_banana
  lv_banana_ss_2 vg_banana Vwi---tz-k  20.00g pool0 lv_banana
  lv_banana_ss_3 vg_banana Vwi---tz-k  20.00g pool0 lv_banana
  lv_banana_ss_4 vg_banana Vwi---tz-k  20.00g pool0 lv_banana
  pool0          vg_banana twi-aotz-- 152.95g                 0.37   10.59



NAME=thin_random_5th
fio --name=$NAME --ioengine=libaio --direct=1 --directory=/mnt/test --size=128m --bs=4k   --readwrite=randwrite > ~/$(date +%Y%m%d.%H%M%S).$NAME.randwrite.txt;     echo $?
fio --name=$NAME --ioengine=libaio --direct=1 --directory=/mnt/test --size=128m --bs=4k   --readwrite=randread  > ~/$(date +%Y%m%d.%H%M%S).$NAME.randread.txt;      echo $?

[root@macbook ~]# ls -lh /mnt/test/
total 640M
-rw-r--r--. 1 root root 128M Mar  3 09:49 thin_random_1st.0.0
-rw-r--r--. 1 root root 128M Mar  3 09:53 thin_random_2nd.0.0
-rw-r--r--. 1 root root 128M Mar  3 09:57 thin_random_3rd.0.0
-rw-r--r--. 1 root root 128M Mar  3 10:01 thin_random_4th.0.0
-rw-r--r--. 1 root root 128M Mar  3 10:03 thin_random_5th.0.0


[root@macbook ~]# egrep 'write:|read:' *txt | awk '{print $1,$4}'
20260303.094938.thin_random_1st.randwrite.txt: BW=10.3MiB/s
20260303.095003.thin_random_1st.randread.txt: BW=20.0MiB/s
20260303.095309.thin_random_2nd.randwrite.txt: BW=15.3MiB/s
20260303.095348.thin_random_2nd.randread.txt: BW=18.8MiB/s
20260303.095726.thin_random_3rd.randwrite.txt: BW=10.7MiB/s
20260303.095750.thin_random_3rd.randread.txt: BW=14.6MiB/s
20260303.100125.thin_random_4th.randwrite.txt: BW=11.6MiB/s
20260303.100143.thin_random_4th.randread.txt: BW=15.6MiB/s
20260303.100302.thin_random_5th.randwrite.txt: BW=11.0MiB/s
20260303.100316.thin_random_5th.randread.txt: BW=18.6MiB/s
[root@macbook ~]#



●●●スナップ無し
[root@macbook ~]# lvs vg_banana
  LV             VG        Attr       LSize   Pool  Origin    Data%  Meta%  Move Log Cpy%Sync Convert
  lv_banana      vg_banana Vwi-aotz--  20.00g pool0           3.45
  lv_banana_ss_1 vg_banana Vwi---tz-k  20.00g pool0 lv_banana
  lv_banana_ss_2 vg_banana Vwi---tz-k  20.00g pool0 lv_banana
  lv_banana_ss_3 vg_banana Vwi---tz-k  20.00g pool0 lv_banana
  lv_banana_ss_4 vg_banana Vwi---tz-k  20.00g pool0 lv_banana
  pool0          vg_banana twi-aotz-- 152.95g                 0.45   10.62
[root@macbook ~]# lvremove vg_banana/lv_banana_ss_1
  Logical volume "lv_banana_ss_1" successfully removed.
[root@macbook ~]# lvs vg_banana
  LV             VG        Attr       LSize   Pool  Origin    Data%  Meta%  Move Log Cpy%Sync Convert
  lv_banana      vg_banana Vwi-aotz--  20.00g pool0           3.45
  lv_banana_ss_2 vg_banana Vwi---tz-k  20.00g pool0 lv_banana
  lv_banana_ss_3 vg_banana Vwi---tz-k  20.00g pool0 lv_banana
  lv_banana_ss_4 vg_banana Vwi---tz-k  20.00g pool0 lv_banana
  pool0          vg_banana twi-aotz-- 152.95g                 0.45   10.61
[root@macbook ~]# lvremove vg_banana/lv_banana_ss_2 vg_banana/lv_banana_ss_3 vg_banana/lv_banana_ss_4
  Logical volume "lv_banana_ss_2" successfully removed.
  Logical volume "lv_banana_ss_3" successfully removed.
  Logical volume "lv_banana_ss_4" successfully removed.
[root@macbook ~]# lvs vg_banana
  LV        VG        Attr       LSize   Pool  Origin Data%  Meta%  Move Log Cpy%Sync Convert
  lv_banana vg_banana Vwi-aotz--  20.00g pool0        3.45
  pool0     vg_banana twi-aotz-- 152.95g              0.45   10.56
[root@macbook ~]#




NAME=thin_random_6th
fio --name=$NAME --ioengine=libaio --direct=1 --directory=/mnt/test --size=128m --bs=4k   --readwrite=randwrite > ~/$(date +%Y%m%d.%H%M%S).$NAME.randwrite.txt;     echo $?
fio --name=$NAME --ioengine=libaio --direct=1 --directory=/mnt/test --size=128m --bs=4k   --readwrite=randread  > ~/$(date +%Y%m%d.%H%M%S).$NAME.randread.txt;      echo $?




[root@macbook ~]# ls -lh /mnt/test/
total 768M
-rw-r--r--. 1 root root 128M Mar  3 09:49 thin_random_1st.0.0
-rw-r--r--. 1 root root 128M Mar  3 09:53 thin_random_2nd.0.0
-rw-r--r--. 1 root root 128M Mar  3 09:57 thin_random_3rd.0.0
-rw-r--r--. 1 root root 128M Mar  3 10:01 thin_random_4th.0.0
-rw-r--r--. 1 root root 128M Mar  3 10:03 thin_random_5th.0.0
-rw-r--r--. 1 root root 128M Mar  3 10:12 thin_random_6th.0.0


[root@macbook ~]# egrep 'write:|read:' *txt | awk '{print $1,$4}'
20260303.094938.thin_random_1st.randwrite.txt: BW=10.3MiB/s
20260303.095003.thin_random_1st.randread.txt: BW=20.0MiB/s
20260303.095309.thin_random_2nd.randwrite.txt: BW=15.3MiB/s
20260303.095348.thin_random_2nd.randread.txt: BW=18.8MiB/s
20260303.095726.thin_random_3rd.randwrite.txt: BW=10.7MiB/s
20260303.095750.thin_random_3rd.randread.txt: BW=14.6MiB/s
20260303.100125.thin_random_4th.randwrite.txt: BW=11.6MiB/s
20260303.100143.thin_random_4th.randread.txt: BW=15.6MiB/s
20260303.100302.thin_random_5th.randwrite.txt: BW=11.0MiB/s
20260303.100316.thin_random_5th.randread.txt: BW=18.6MiB/s
20260303.101248.thin_random_6th.randwrite.txt: BW=13.9MiB/s
20260303.101301.thin_random_6th.randread.txt: BW=18.9MiB/s
[root@macbook ~]#