chibenwa opened a new pull request #572:
URL: https://github.com/apache/james-project/pull/572
SHA-256 generates 32 bytes long hash.
HEX encodes 1 byte with two characters so leads to 64 long
char strings.
Base64 have an overhead of 133% so leads to use 44
characters.
This simple change have the potential to significantly
decrease Cassandra storage space: each message storing 4
blobIds minimum (messageV3 header and body, header in
imapuidtable and messageidtable, not counting attachments)
thus we save 80 bytes per message pre-compression.
Note that deduplication is affected by this fix: similar
content before / after this fix will be affected different
blobIds so will be stored twice.
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