47 lines
1.2 KiB
Markdown
47 lines
1.2 KiB
Markdown
# Test Case: zstd Compression Level 15
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**Test ID**: TC106-zstd-level15
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**G5 fixture contract**: Use [G5-MANUAL-SETUP.md](G5-MANUAL-SETUP.md).
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Its generated paths, source comparisons, structured corruption offsets, and
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cleanup rules supersede placeholder examples in this file.
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**Category**: Compression
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**Priority**: High
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**Regression**: None
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## Objective
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Verify zstd compressed data path with level 15 (high) compression.
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## Preconditions
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- EROFS image created with zstd level 15: `mkfs.erofs -zzstd,level=15 test.img src/`
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- Large test files for compression testing
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- FreeBSD 13.0+ with libzstd
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## Test Steps
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1. Create image with zstd level 15 compression
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2. Attach and mount: `unit=$(mdconfig -a -t vnode -f test.img); mount -t erofs -o ro /dev/${unit} /mnt`
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3. Read all test files
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4. Verify content integrity
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5. Test partial reads
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## Expected Results
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- All files decompress correctly
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- Better compression than level 1
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- Decompression still fast
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- No memory issues
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## Verification Method
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- All checksums match
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- Compression ratio > zstd level 1
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- Decompression works for all files
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- Random access validated
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## Cleanup
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```sh
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umount /mnt
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mdconfig -d -u "${unit}"
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```
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## Notes
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Tests feature 59: zstd compressed data path with high compression.
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