Minio tests for multipart upload behaviour:
- upload part renumbering test - part skipping test
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#!/usr/bin/env bash
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: '
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This script tests part renumbering on an S3 remote (here configured for Minio).
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On Minio:
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The results confirm that if I upload parts with number 1, 4, 5 and 6,
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they are renumbered to 1, 2, 3 and 4 after CompleteMultipartUpload.
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Thus, specifying partNumber=4 on a GetObject/HeadObject should return
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information on the part I originally uploaded with part number
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On S3: not tested
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Sample output (on Minio):
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f07e1404cc527d494242824ded3a616b part1
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78974cd4d0f622eb3426ea7cd22f5a1c part4
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f9cc379f8baa61645558d9ba7e6351fa part5
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1bd2383eebbac1f8e7143575ba5b1f4a part6
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Upload ID: 6838b813-d0ca-400b-9d28-ec8b2b5cd004
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PART 1 ETag: "f07e1404cc527d494242824ded3a616b"
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PART 4 ETag: "78974cd4d0f622eb3426ea7cd22f5a1c"
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PART 5 ETag: "f9cc379f8baa61645558d9ba7e6351fa"
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PART 6 ETag: "1bd2383eebbac1f8e7143575ba5b1f4a"
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======================================== LIST ====
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{
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"Parts": [
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{
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"PartNumber": 1,
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"LastModified": "2023-04-25T10:21:54.350000+00:00",
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"ETag": "\"f07e1404cc527d494242824ded3a616b\"",
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"Size": 20971520
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},
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{
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"PartNumber": 4,
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"LastModified": "2023-04-25T10:21:54.350000+00:00",
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"ETag": "\"78974cd4d0f622eb3426ea7cd22f5a1c\"",
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"Size": 20971520
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},
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{
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"PartNumber": 5,
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"LastModified": "2023-04-25T10:21:54.350000+00:00",
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"ETag": "\"f9cc379f8baa61645558d9ba7e6351fa\"",
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"Size": 20971520
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},
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{
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"PartNumber": 6,
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"LastModified": "2023-04-25T10:21:54.350000+00:00",
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"ETag": "\"1bd2383eebbac1f8e7143575ba5b1f4a\"",
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"Size": 20971520
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}
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],
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"ChecksumAlgorithm": "",
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"Initiator": {
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"ID": "02d6176db174dc93cb1b899f7c6078f08654445fe8cf1b6ce98d8855f66bdbf4",
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"DisplayName": "02d6176db174dc93cb1b899f7c6078f08654445fe8cf1b6ce98d8855f66bdbf4"
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},
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"Owner": {
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"DisplayName": "02d6176db174dc93cb1b899f7c6078f08654445fe8cf1b6ce98d8855f66bdbf4",
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"ID": "02d6176db174dc93cb1b899f7c6078f08654445fe8cf1b6ce98d8855f66bdbf4"
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},
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"StorageClass": "STANDARD"
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}
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======================================== COMPLETE ====
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{
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"Location": "http://localhost:9000/test/upload",
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"Bucket": "test",
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"Key": "upload",
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"ETag": "\"8e817c8ccd442f9a79c77b58fe808c43-4\""
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}
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======================================== LIST ====
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An error occurred (NoSuchUpload) when calling the ListParts operation: The specified multipart upload does not exist. The upload ID may be invalid, or the upload may have been aborted or completed.
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======================================== GET PART 4 ====
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{
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"AcceptRanges": "bytes",
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"LastModified": "2023-04-25T10:21:59+00:00",
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"ContentLength": 20971520,
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"ETag": "\"8e817c8ccd442f9a79c77b58fe808c43-4\"",
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"ContentRange": "bytes 62914560-83886079/83886080",
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"ContentType": "binary/octet-stream",
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"Metadata": {},
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"PartsCount": 4
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}
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1bd2383eebbac1f8e7143575ba5b1f4a get-part4
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Conclusions:
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- Parts are indeed renumbered with consecutive numbers
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- ListParts only applies to multipart uploads in progress,
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it cannot be used once the multipart upload has been completed
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'
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export AWS_ACCESS_KEY_ID=1D8Pk2k4oQSoh1BU
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export AWS_SECRET_ACCESS_KEY=4B46SR8U7FUgY0raB8Zuxg1NLyLTvbNV
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function aws { command aws --endpoint-url http://localhost:9000 $@ ; }
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aws --version
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aws s3 mb s3://test
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for NUM in 1 4 5 6; do
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dd if=/dev/urandom of=part$NUM bs=1M count=10
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done
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md5sum part*
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UPLOAD=$(aws s3api create-multipart-upload --bucket test --key 'upload' | jq -r ".UploadId")
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echo "Upload ID: $UPLOAD"
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PARTS=""
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for NUM in 1 4 5 6; do
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ETAG=$(aws s3api upload-part --bucket test --key 'upload' --part-number $NUM \
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--body "part$NUM" --upload-id "$UPLOAD" | jq -r ".ETag")
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echo "PART $NUM ETag: $ETAG"
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if [ -n "$PARTS" ]; then
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PARTS="$PARTS,"
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fi
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PARTS="$PARTS {\"ETag\":$ETAG,\"PartNumber\":$NUM}"
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done
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echo "======================================== LIST ===="
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aws s3api list-parts --bucket test --key upload --upload-id "$UPLOAD" | jq
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echo "======================================== COMPLETE ===="
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echo "{\"Parts\":[$PARTS]}" > mpu
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aws s3api complete-multipart-upload --multipart-upload file://mpu \
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--bucket test --key 'upload' --upload-id "$UPLOAD"
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echo "======================================== LIST ===="
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aws s3api list-parts --bucket test --key upload --upload-id "$UPLOAD" | jq
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echo "======================================== GET PART 4 ===="
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aws s3api get-object --bucket test --key upload --part-number 4 get-part4
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md5sum get-part4
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@ -0,0 +1,103 @@
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#!/usr/bin/env bash
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: '
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This script tests whether uploaded parts can be skipped in a
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CompleteMultipartUpoad
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On Minio: yes, parts can be skipped
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On S3: not tested
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Sample output (on Minio):
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f23911bcd1230f5ebe8887cbf5bc396e part1
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a2657143167eaf647c40473e78a091dc part4
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72f72c02c5163bc81024b28ac818c5e0 part5
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e29cf500d20498218904b8df8806caa2 part6
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Upload ID: e8fe7b83-9800-46fb-ae90-9d7ccd42fe76
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PART 1 ETag: "f23911bcd1230f5ebe8887cbf5bc396e"
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PART 4 ETag: "a2657143167eaf647c40473e78a091dc"
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PART 5 ETag: "72f72c02c5163bc81024b28ac818c5e0"
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PART 6 ETag: "e29cf500d20498218904b8df8806caa2"
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======================================== COMPLETE ====
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{
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"Location": "http://localhost:9000/test/upload",
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"Bucket": "test",
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"Key": "upload",
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"ETag": "\"48246e44d4b38bdc2f3c10ee25b1af17-3\""
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}
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======================================== GET FULL ====
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{
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"AcceptRanges": "bytes",
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"LastModified": "2023-04-25T10:54:35+00:00",
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"ContentLength": 31457280,
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"ETag": "\"48246e44d4b38bdc2f3c10ee25b1af17-3\"",
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"ContentType": "binary/octet-stream",
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"Metadata": {}
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}
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97fb904da7ad310699a6afab0eb6e061 get-full
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97fb904da7ad310699a6afab0eb6e061 -
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======================================== GET PART 3 ====
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{
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"AcceptRanges": "bytes",
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"LastModified": "2023-04-25T10:54:35+00:00",
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"ContentLength": 10485760,
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"ETag": "\"48246e44d4b38bdc2f3c10ee25b1af17-3\"",
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"ContentRange": "bytes 20971520-31457279/31457280",
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"ContentType": "binary/octet-stream",
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"Metadata": {},
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"PartsCount": 3
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}
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e29cf500d20498218904b8df8806caa2 get-part3
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Conclusions:
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- Skipping a part in a CompleteMultipartUpoad call is OK
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- The part is simply not included in the stored object
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- Sequential part renumbering counts only non-skipped parts
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'
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export AWS_ACCESS_KEY_ID=1D8Pk2k4oQSoh1BU
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export AWS_SECRET_ACCESS_KEY=4B46SR8U7FUgY0raB8Zuxg1NLyLTvbNV
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function aws { command aws --endpoint-url http://localhost:9000 $@ ; }
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aws --version
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aws s3 mb s3://test
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for NUM in 1 4 5 6; do
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dd if=/dev/urandom of=part$NUM bs=1M count=10
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done
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md5sum part*
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UPLOAD=$(aws s3api create-multipart-upload --bucket test --key 'upload' | jq -r ".UploadId")
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echo "Upload ID: $UPLOAD"
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PARTS=""
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for NUM in 1 4 5 6; do
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ETAG=$(aws s3api upload-part --bucket test --key 'upload' --part-number $NUM \
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--body "part$NUM" --upload-id "$UPLOAD" | jq -r ".ETag")
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echo "PART $NUM ETag: $ETAG"
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if [ "$NUM" != "5" ]; then
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if [ -n "$PARTS" ]; then
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PARTS="$PARTS,"
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fi
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PARTS="$PARTS {\"ETag\":$ETAG,\"PartNumber\":$NUM}"
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fi
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done
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echo "======================================== COMPLETE ===="
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echo "{\"Parts\":[$PARTS]}" > mpu
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aws s3api complete-multipart-upload --multipart-upload file://mpu \
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--bucket test --key 'upload' --upload-id "$UPLOAD"
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echo "======================================== GET FULL ===="
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aws s3api get-object --bucket test --key upload get-full
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md5sum get-full
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cat part1 part4 part6 | md5sum
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echo "======================================== GET PART 3 ===="
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aws s3api get-object --bucket test --key upload --part-number 3 get-part3
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md5sum get-part3
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