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docs/fs_stats/btrfs_after_delete.md

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+# deduplicated on BTRFS
+
+After extration, after deleting the dedupl folder.
+
+### creation params
+
+```
+mkfs.btrfs -m single
+mount -o noacl,nobarrier,noatime,max_inline=4096
+```
+
+### df
+
+```
+df -h mnt_rw
+Filesystem      Size  Used Avail Use% Mounted on
+/dev/loop3      300G  133G  158G  46%
+```
+
+### btrfs
+
+```
+btrfs filesystem df mnt_rw
+Data, single: total=48.01GiB, used=47.45GiB
+System, single: total=4.00MiB, used=16.00KiB
+Metadata, single: total=95.01GiB, used=84.96GiB
+GlobalReserve, single: total=512.00MiB, used=0.00B
+```
+
+
+```
+btrfs filesystem du -s mnt_rw
+     Total   Exclusive  Set shared  Filename
+  47.45GiB    47.45GiB       0.00B  mnt_rw
+```
+```
+btrfs filesystem show mnt_rw
+	Total devices 1 FS bytes used 132.41GiB
+	devid    1 size 300.00GiB used 143.02GiB path /dev/loop3
+```
+
+```
+btrfs filesystem usage mnt_rw
+Overall:
+    Device size:		 300.00GiB
+    Device allocated:		 143.02GiB
+    Device unallocated:		 156.98GiB
+    Device missing:		     0.00B
+    Used:			 132.41GiB
+    Free (estimated):		 157.54GiB	(min: 157.54GiB)
+    Free (statfs, df):		 157.54GiB
+    Data ratio:			      1.00
+    Metadata ratio:		      1.00
+    Global reserve:		 512.00MiB	(used: 0.00B)
+    Multiple profiles:		        no
+
+Data,single: Size:48.01GiB, Used:47.45GiB (98.83%)
+   /dev/loop3	  48.01GiB
+
+Metadata,single: Size:95.01GiB, Used:84.96GiB (89.43%)
+   /dev/loop3	  95.01GiB
+
+System,single: Size:4.00MiB, Used:16.00KiB (0.39%)
+   /dev/loop3	   4.00MiB
+
+Unallocated:
+   /dev/loop3	 156.98GiB
+```
+
+### compsize
+
+
+```
+compsize -x mnt_rw
+Processed 308790063 files, 3458682 regular extents (6917363 refs), 301872700 inline.
+Type       Perc     Disk Usage   Uncompressed Referenced  
+TOTAL      100%      118G         118G         165G       
+none       100%      118G         118G         165G       
+```