docs: Move developer docs from top-level to its own directory. (#1642)
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## Multipart backend format |
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When multipart upload is used for objects, below meta-data/staging files are created |
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- New multipart upload call creates file ```EXPORT_DIR/.minio/BUCKET/PATH/TO/OBJECT/UPLOAD_ID.uploadid``` |
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- Put object part call creates file ```EXPORT_DIR/.minio/BUCKET/PATH/TO/OBJECT/UPLOAD_ID.PART_NUMBER.MD5SUM_STRING``` |
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- Abort multipart call removes all files matching ```EXPORT_DIR/.minio/BUCKET/PATH/TO/OBJECT/UPLOAD_ID.*``` |
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- Complete multipart call does |
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1. Create a staging file ```EXPORT_DIR/.minio/BUCKET/PATH/TO/OBJECT/UPLOAD_ID.complete.TEMP_NAME``` then rename to ```EXPORT_DIR/.minio/BUCKET/PATH/TO/OBJECT/UPLOAD_ID.complete``` |
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2. Rename staging file ```EXPORT_DIR/.minio/BUCKET/PATH/TO/OBJECT/UPLOAD_ID.complete``` to ```EXPORT_DIR/BUCKET/PATH/TO/OBJECT``` |
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## Multipart |
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Each incoming part is uploaded in the following format. |
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Placeholder uploads.json to indicate a leaf. |
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```EXPORT_DIR/.minio/multipart/BUCKET/PATH/TO/OBJECT/uploads.json``` |
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Incomplete file |
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```EXPORT_DIR/.minio/multipart/BUCKET/PATH/TO/OBJECT/UPLOADID/00000.incomplete``` |
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Actual parts |
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```EXPORT_DIR/.minio/multipart/BUCKET/PATH/TO/OBJECT/UPLOADID/PART_NUMBER.MD5SUM_STRING``` |
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## FS Format. |
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Each of these parts are concatenated back to a single contigous file. |
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```EXPORT_DIR/BUCKET/PATH/TO/OBJECT``` |
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## XL Format. |
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Each of these parts are kept as is in the following format. |
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Special json file indicate the metata multipart information, essentially list of parts etc. |
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```EXPORT_DIR/BUCKET/PATH/TO/OBJECT/00000.minio.multipart``` |
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All the parts that were uploaded. |
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```EXPORT_DIR/BUCKET/PATH/TO/OBJECT/PART_NUMBER.minio.multipart``` |
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### file.json |
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``file.json`` is a special file captured and written by XL storage API layer |
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to interpret, manage and extract erasured data to multiple disks. |
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to interpret, manage and extract erasured data from multiple disks. |
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```json |
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{ |
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