wjones127 commented on code in PR #35808:
URL: https://github.com/apache/arrow/pull/35808#discussion_r1208683874
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cpp/src/arrow/filesystem/s3fs.cc:
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@@ -1154,7 +1154,7 @@ class ObjectInputFile final : public io::RandomAccessFile
{
// AWS doc says "5 MB" but it's not clear whether those are MB or MiB,
// so I chose the safer value.
// (see
https://docs.aws.amazon.com/AmazonS3/latest/API/mpUploadUploadPart.html)
-static constexpr int64_t kMinimumPartUpload = 5 * 1024 * 1024;
+static constexpr int64_t kMinimumPartUpload = 10 * 1024 * 1024;
Review Comment:
Previously our limit was ~2.4TB. In the new design, it is 100GB. It would be
only 50GB if it was left at 5MB per part. I feel like this is an okay balance,
but willing to hear other's opinions.
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