mirror of
https://github.com/hyperknot/openfreemap.git
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68 lines
1.5 KiB
Bash
68 lines
1.5 KiB
Bash
#!/usr/bin/env bash
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# reference:
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# https://www.kernel.org/doc/Documentation/filesystems/ext4.txt
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# https://wiki.archlinux.org/title/ext4
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#
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# -m reserved-blocks-percentage
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# -F Force mke2fs to create a filesystem, even if the specified device is not a partition on a block special device
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#
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# -O feature
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# from /etc/mke2fs.conf
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# defaults: has_journal,extent,huge_file,flex_bg,metadata_csum,64bit,dir_nlink,extra_isize
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# disabling journalling, since it's a read-only fs, as well as other unused features
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# extent is actually needed for tail packing small files
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#
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# -E extended-options
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# lazy_itable_init - inode table is fully initialized at the time of file system creation
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# nodiscard - Do not attempt to discard blocks at mkfs time.
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#
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# inode_size = 128 (minimum)
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# inode_ratio = 16384 (default but experimenting)
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sudo umount mnt || true
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rm -rf mnt
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rm -f image.ext4
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# make a sparse file
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# make sure it's bigger then the current OSM output
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fallocate -l 200G image.ext4
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mke2fs -t ext4 -v \
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-m 0 \
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-F \
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-O ^has_journal,^huge_file,^metadata_csum,^64bit,^extra_isize \
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-E lazy_itable_init=0,nodiscard \
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-I 128 \
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-i 16384 \
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image.ext4
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mkdir mnt
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sudo mount -v \
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-t ext4 \
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-o nobarrier,noatime \
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image.ext4 mnt
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sudo chown ofm:ofm -R mnt
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../../tile_gen/venv/bin/python ../../tile_gen/extract.py output.mbtiles mnt/extract \
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> "extract_out.log" 2> "extract_err.log"
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sudo umount mnt
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e2fsck -vf image.ext4 && \
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resize2fs -M image.ext4 && \
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e2fsck -vf image.ext4
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# default to read-only mode
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tune2fs -E mount_opts=ro image.ext4
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