chetanmeh opened a new issue #3500: Make attachments immutable URL: https://github.com/apache/incubator-openwhisk/issues/3500 As part of work to enable [AttachmentStore SPI](#3450) we need to make attachments immutable. More details are provided in [mail thread][1]. In brief key point is that each attachment must be give a unique name and it should be created in following way 1. Upload the attachment and have ArtifactStore return a generated name 2. Then update the document with attachmentName set to name returned in previous step 3. Then delete the old attachment after #2 completes successfully The approach would allow an AttachmentStore to 1. Ensure that attachments are uniquely named 2. Possibly inline small attachments by encoding the attachment content in attachment name say if 1KB doc is to be inlined the attachment name is hex encoded doc content [1]: https://lists.apache.org/thread.html/f90129cf991023c5a2c4622658d37d0eb14ecbc561f970e55bbd0035@%3Cdev.openwhisk.apache.org%3E
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