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Clarification regarding record format

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Summary:
The CRC is actually calculated based on the record type and payload.
The wiki should also be updated accordingly and extended with a section on the recyclable record format.
Closes https://github.com/facebook/rocksdb/pull/3576

Differential Revision: D7196478

Pulled By: siying

fbshipit-source-id: 39f7a0395075cc73e2aa2bfc9e42c85bce35e765
This commit is contained in:
Lukas Rist 2018-03-08 10:11:18 -08:00 committed by Facebook Github Bot
parent b560fc9f62
commit a277b0f2b7
1 changed files with 1 additions and 1 deletions
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2
db/log_writer.h
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@ -49,7 +49,7 @@ namespace log {
* |CRC (4B) | Size (2B) | Type (1B) | Payload |
* +---------+-----------+-----------+--- ... ---+
*
* CRC = 32bit hash computed over the payload using CRC
* CRC = 32bit hash computed over the record type and payload using CRC
* Size = Length of the payload data
* Type = Type of record
* (kZeroType, kFullType, kFirstType, kLastType, kMiddleType )