work

scripts/tile_gen/extract_btrfs.sh

@@ -6,7 +6,7 @@ rm -f image.btrfs
 
 
 # make an empty file that's definitely bigger then the current OSM output
-fallocate -l 300G image.btrfs
+fallocate -l 200G image.btrfs
 
 
 # metadata: single needed as default is now DUP
@@ -35,3 +35,4 @@ sudo ../../tile_gen/venv/bin/python ../../tile_gen/shrink_btrfs.py image.btrfs \
 
 # pigz -k image.btrfs --fast
 
+# rsync -avH mnt_rw/extract/ mnt_rw2/extract/ > rsync_out.log 2> rsync_err.log

scripts/tile_gen/extract_ext4.sh

@@ -17,7 +17,8 @@
 # lazy_itable_init - inode table is fully initialized at the time of file system creation
 # nodiscard - Do not attempt to discard blocks at mkfs time.
 #
-# -T news or small
+# inode_size = 128 (minimum)
+# inode_ratio = 16384 (default but experimenting)
 
 
 sudo umount mnt || true
@@ -27,16 +28,16 @@ rm -f image.ext4
 
 # make a sparse file
 # make sure it's bigger then the current OSM output
-fallocate -l 300G image.ext4
+fallocate -l 200G image.ext4
 
 
 mke2fs -t ext4 -v \
   -m 0 \
   -F \
   -O ^has_journal,^huge_file,^metadata_csum,^64bit,^extra_isize \
   -E lazy_itable_init=0,nodiscard \
-  -T small \
   -I 128 \
+  -i 16384 \
   image.ext4
 
 mkdir mnt