[root@storage-mix ~]# pvs PV VG Fmt Attr PSize PFree /dev/sdc vg_apple lvm2 a-- <16.00g <8.00g /dev/sdd vg_banana lvm2 a-- <16.00g <4.00g [root@storage-mix ~]# vgs VG #PV #LV #SN Attr VSize VFree vg_apple 1 1 0 wz--n- <16.00g <8.00g vg_banana 1 3 0 wz--n- <16.00g <4.00g [root@storage-mix ~]# lvs LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert lv_apple vg_apple -wi-ao---- 8.00g pool0 vg_banana twi-aotz-- 10.00g 20.65 1.65 thin1 vg_banana Vwi-aotz-- 64.00g pool0 3.18 thin2 vg_banana Vwi-a-tz-- 64.00g pool0 0.05 ■スナップショット作成 [root@storage-mix ~]# lvcreate --snapshot --name thin1_ss_1 vg_banana/thin1 WARNING: Sum of all thin volume sizes (192.00 GiB) exceeds the size of thin pool vg_banana/pool0 and the size of whole volume group (<16.00 GiB). WARNING: You have not turned on protection against thin pools running out of space. WARNING: Set activation/thin_pool_autoextend_threshold below 100 to trigger automatic extension of thin pools before they get full. Logical volume "thin1_ss_1" created. [root@storage-mix ~]# pvs PV VG Fmt Attr PSize PFree /dev/sdc vg_apple lvm2 a-- <16.00g <8.00g /dev/sdd vg_banana lvm2 a-- <16.00g <4.00g [root@storage-mix ~]# vgs VG #PV #LV #SN Attr VSize VFree vg_apple 1 1 0 wz--n- <16.00g <8.00g vg_banana 1 4 0 wz--n- <16.00g <4.00g [root@storage-mix ~]# lvs LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert lv_apple vg_apple -wi-ao---- 8.00g pool0 vg_banana twi-aotz-- 10.00g 20.65 1.65 thin1 vg_banana Vwi-aotz-- 64.00g pool0 3.18 thin1_ss_1 vg_banana Vwi---tz-k 64.00g pool0 thin1 thin2 vg_banana Vwi-a-tz-- 64.00g pool0 0.05 ■コマンド投入 fio --name=TEST --ioengine=libaio --direct=1 --directory=/mnt/disk-lvm-thin --ramp_time=4 --runtime=30 --size=2g --bs=1024k --readwrite=write > ~/lvm-thin-ss-1/1_write.txt fio --name=TEST --ioengine=libaio --direct=1 --directory=/mnt/disk-lvm-thin --ramp_time=4 --runtime=30 --size=2g --bs=1024k --readwrite=read > ~/lvm-thin-ss-1/2_read.txt fio --name=TEST --ioengine=libaio --direct=1 --directory=/mnt/disk-lvm-thin --ramp_time=4 --runtime=30 --size=2g --bs=4k --readwrite=randwrite > ~/lvm-thin-ss-1/3_randwrite.txt fio --name=TEST --ioengine=libaio --direct=1 --directory=/mnt/disk-lvm-thin --ramp_time=4 --runtime=30 --size=2g --bs=4k --readwrite=randread > ~/lvm-thin-ss-1/4_randread.txt ■2つ目のスナップショット作成 [root@storage-mix ~]# lvcreate --snapshot --name thin1_ss_2 vg_banana/thin1 WARNING: Sum of all thin volume sizes (256.00 GiB) exceeds the size of thin pool vg_banana/pool0 and the size of whole volume group (<16.00 GiB). WARNING: You have not turned on protection against thin pools running out of space. WARNING: Set activation/thin_pool_autoextend_threshold below 100 to trigger automatic extension of thin pools before they get full. Logical volume "thin1_ss_2" created. ■コマンド投入 fio --name=TEST --ioengine=libaio --direct=1 --directory=/mnt/disk-lvm-thin --ramp_time=4 --runtime=30 --size=2g --bs=1024k --readwrite=write > ~/lvm-thin-ss-2/1_write.txt fio --name=TEST --ioengine=libaio --direct=1 --directory=/mnt/disk-lvm-thin --ramp_time=4 --runtime=30 --size=2g --bs=1024k --readwrite=read > ~/lvm-thin-ss-2/2_read.txt fio --name=TEST --ioengine=libaio --direct=1 --directory=/mnt/disk-lvm-thin --ramp_time=4 --runtime=30 --size=2g --bs=4k --readwrite=randwrite > ~/lvm-thin-ss-2/3_randwrite.txt fio --name=TEST --ioengine=libaio --direct=1 --directory=/mnt/disk-lvm-thin --ramp_time=4 --runtime=30 --size=2g --bs=4k --readwrite=randread > ~/lvm-thin-ss-2/4_randread.txt ■スナップショット削除 [root@storage-mix ~]# lvremove vg_banana/thin1_ss_1 Logical volume "thin1_ss_1" successfully removed. [root@storage-mix ~]# lvremove vg_banana/thin1_ss_2 Logical volume "thin1_ss_2" successfully removed. ■コマンド投入 fio --name=TEST --ioengine=libaio --direct=1 --directory=/mnt/disk-lvm-thin --ramp_time=4 --runtime=30 --size=2g --bs=1024k --readwrite=write > ~/lvm-thin-ss-3/1_write.txt fio --name=TEST --ioengine=libaio --direct=1 --directory=/mnt/disk-lvm-thin --ramp_time=4 --runtime=30 --size=2g --bs=1024k --readwrite=read > ~/lvm-thin-ss-3/2_read.txt fio --name=TEST --ioengine=libaio --direct=1 --directory=/mnt/disk-lvm-thin --ramp_time=4 --runtime=30 --size=2g --bs=4k --readwrite=randwrite > ~/lvm-thin-ss-3/3_randwrite.txt fio --name=TEST --ioengine=libaio --direct=1 --directory=/mnt/disk-lvm-thin --ramp_time=4 --runtime=30 --size=2g --bs=4k --readwrite=randread > ~/lvm-thin-ss-3/4_randread.txt [root@storage-mix ~]# grep write: /mnt/disk-lvm-thin/1_write.txt ~/lvm-thin-ss-*/1_write.txt ■シーケンシャル write /mnt/disk-lvm-thin/1_write.txt: write: IOPS=85, BW=85.3MiB/s (89.4MB/s)(1653MiB/19384msec); 0 zone resets ■基準（スナップショット無し） /root/lvm-thin-ss-1/1_write.txt: write: IOPS=62, BW=62.8MiB/s (65.9MB/s)(1760MiB/28015msec); 0 zone resets ■スナップショットが一つ存在するときに測定・・・性能が低下 /root/lvm-thin-ss-2/1_write.txt: write: IOPS=62, BW=62.3MiB/s (65.3MB/s)(1763MiB/28295msec); 0 zone resets ■スナップショットが二つ存在するときに測定 /root/lvm-thin-ss-3/1_write.txt: write: IOPS=91, BW=91.5MiB/s (96.0MB/s)(1660MiB/18134msec); 0 zone resets ■スナップショットを消して測定 [root@storage-mix ~]# grep read: /mnt/disk-lvm-thin/2_read.txt ~/lvm-thin-ss-*/2_read.txt ■シーケンシャル read /mnt/disk-lvm-thin/2_read.txt: read: IOPS=144, BW=145MiB/s (152MB/s)(1501MiB/10358msec) ■基準（スナップショット無し） /root/lvm-thin-ss-1/2_read.txt: read: IOPS=136, BW=136MiB/s (143MB/s)(1427MiB/10470msec) ■スナップショットが一つ存在するときに測定 /root/lvm-thin-ss-2/2_read.txt: read: IOPS=119, BW=119MiB/s (125MB/s)(1580MiB/13260msec) ■スナップショットが二つ存在するときに測定 /root/lvm-thin-ss-3/2_read.txt: read: IOPS=114, BW=115MiB/s (121MB/s)(1580MiB/13741msec) ■スナップショットを消して測定 [root@storage-mix ~]# grep write: /mnt/disk-lvm-thin/3_randwrite.txt ~/lvm-thin-ss-*/3_randwrite.txt ■ランダム write /mnt/disk-lvm-thin/3_randwrite.txt: write: IOPS=221, BW=888KiB/s (909kB/s)(27.0MiB/31162msec); 0 zone resets ■基準（スナップショット無し） /root/lvm-thin-ss-1/3_randwrite.txt: write: IOPS=232, BW=929KiB/s (951kB/s)(31.2MiB/34367msec); 0 zone resets ■スナップショットが一つ存在するときに測定・・・性能が低下していない /root/lvm-thin-ss-2/3_randwrite.txt: write: IOPS=208, BW=833KiB/s (853kB/s)(24.4MiB/30001msec); 0 zone resets ■スナップショットが二つ存在するときに測定 /root/lvm-thin-ss-3/3_randwrite.txt: write: IOPS=231, BW=924KiB/s (946kB/s)(27.2MiB/30087msec); 0 zone resets ■スナップショットを消して測定 [root@storage-mix ~]# grep read: /mnt/disk-lvm-thin/4_randread.txt ~/lvm-thin-ss-*/4_randread.txt ■ランダム read /mnt/disk-lvm-thin/4_randread.txt: read: IOPS=81, BW=324KiB/s (332kB/s)(9728KiB/30009msec) ■基準（スナップショット無し） /root/lvm-thin-ss-1/4_randread.txt: read: IOPS=97, BW=391KiB/s (400kB/s)(11.4MiB/30008msec) ■スナップショットが一つ存在するときに測定 /root/lvm-thin-ss-2/4_randread.txt: read: IOPS=88, BW=354KiB/s (362kB/s)(10.4MiB/30011msec) ■スナップショットが二つ存在するときに測定 /root/lvm-thin-ss-3/4_randread.txt: read: IOPS=89, BW=360KiB/s (368kB/s)(10.5MiB/30007msec) ■スナップショットを消して測定