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Multipart copy #237

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Merged
farski merged 2 commits into from
Jun 9, 2026
Merged

Multipart copy #237

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4fc5f18
Use multipart copy for smaller files on ingest
farski Jun 9, 2026
bcc4718
Increase limit to 100 MB
farski Jun 9, 2026
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4 changes: 3 additions & 1 deletion src/lambdas/ingest/source/aws-s3.js
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Expand Up @@ -130,7 +130,9 @@ export default async function main(event, artifact) {

// S3 can perform a native copy of objects up to 5 GB using the CopyObject
// API. For objects larger than 5 GB, a multi-part upload must be used.
if (head.ContentLength < 5000000000) {
// We use multi-part uploads for files over 100 MB.
const MB = 10 ** 6; // 10^6 bytes = 1,000,000 B = 1 MB
if (head.ContentLength < 100 * MB) {
// Copies an existing S3 object to the S3 artifact bucket.
// https://docs.aws.amazon.com/AWSJavaScriptSDK/latest/AWS/S3.html#copyObject-property
// https://docs.aws.amazon.com/AmazonS3/latest/API/RESTObjectCOPY.html
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