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Gracefully handle duplicate name with unique MD5 (#3355) #3426

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merged 1 commit into from
May 22, 2023

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  • Gracefully handle duplicate name with unique MD5

PBENCH-1112

In testing we're seeing duplicate tarball names with distinct MD5 values. We have reduced the importance of duplicate tarball names, relying on the dataset resource ID (MD5) for "uniqueness" internally. However the cache manager still maintains tarball files and MD5 companions on disk, and the upload API has to temporarily store the API payload somewhere. When the duplicate tarballs are uploaded concurrently, the .open() fails, leading to an internal server error. We want to minimize the chance of reporting internal server errors where possible.

Instead, move temporarily upload files into an MD5-based subdirectory, and clean up that directory after upload completes.

…analysis#3355)

* Gracefully handle duplicate name with unique MD5

PBENCH-1112

In testing we're seeing duplicate tarball names with distinct MD5 values. We
have reduced the importance of duplicate tarball names, relying on the dataset
resource ID (MD5) for "uniqueness" internally. However the cache manager still
maintains tarball files and MD5 companions on disk, and the upload API has to
temporarily store the API payload somewhere. When the duplicate tarballs are
uploaded concurrently, the `.open()` fails, leading to an internal server
error. We want to minimize the chance of reporting internal server errors where
possible.

Instead, move temporarily upload files into an MD5-based subdirectory, and
clean up that directory after upload completes.
@dbutenhof dbutenhof self-assigned this May 18, 2023
@dbutenhof dbutenhof added bug Server API Of and relating to application programming interfaces to services and functions Backport PRs with this label should be considered for back porting to previous release branches labels May 18, 2023
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Looks good to me, but I noted a couple of things to keep in the backs of our minds for the main branch.

lib/pbench/server/api/resources/upload_api.py Show resolved Hide resolved
lib/pbench/test/unit/server/test_upload.py Show resolved Hide resolved
@dbutenhof dbutenhof merged commit c464a6a into distributed-system-analysis:b0.72 May 22, 2023
@dbutenhof dbutenhof deleted the dup branch May 22, 2023 11:19
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4 participants