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Update compression README.md (#7823) 

- Snappy is not and RLE compressor, it is LZ77 based.
- Add `xz` as a common file type.
- Add most common media container types.
- Never heard of `application/x-spoon`. Google turns up a blank as well.
- Change link to minio blog post on compression & encryption.
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Klaus Post 2019-06-23 10:22:58 +02:00 committed by Nitish Tiwari
parent 90ca73af13
commit 61229b38f7
1 changed files with 8 additions and 3 deletions
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docs/compression/README.md
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@ -44,7 +44,7 @@ export MINIO_COMPRESS_MIMETYPES="application/pdf"
### 3. Note
- Already compressed objects are not fit for compression since they do not have compressible patterns. Such objects do not produce efficient [`Run-length encoding (RLE)`](https://en.wikipedia.org/wiki/Run-length_encoding) which is a fitness factor for a lossless data compression. Below is a list of common files and content-types which are not suitable for compression.
- Already compressed objects are not fit for compression since they do not have compressible patterns. Such objects do not produce efficient [`LZ compression`](https://en.wikipedia.org/wiki/LZ77_and_LZ78) which is a fitness factor for a lossless data compression. Below is a list of common files and content-types which are not suitable for compression.
- Extensions
@ -53,6 +53,10 @@ export MINIO_COMPRESS_MIMETYPES="application/pdf"
| `rar` | (WinRAR)
| `zip` | (ZIP)
| `7z` | (7-Zip)
| `xz` | (LZMA)
| `mp4` | (MP4)
| `mkv` | (MKV media)
| `mov` | (MOV)
- Content-Types
@ -61,10 +65,11 @@ export MINIO_COMPRESS_MIMETYPES="application/pdf"
| `application/zip` |
| `application/x-gzip` |
| `application/zip` |
| `application/x-bz2` |
| `application/x-compress` |
| `application/x-spoon` |
| `application/x-xz` |
- MinIO does not support encryption with compression because compression and encryption together enables room for side channel attacks like [`CRIME and BREACH`](https://en.wikipedia.org/wiki/CRIME)
- MinIO does not support encryption with compression because compression and encryption together potentially enables room for side channel attacks like [`CRIME and BREACH`](https://blog.minio.io/c-e-compression-encryption-cb6b7f04a369)
- MinIO does not support compression for Gateway (Azure/GCS/NAS) implementations.