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View Code? Open in Web Editor NEWA persistent queue based on RocksDB
A persistent queue based on RocksDB
Hello,
To reproduce this case, you need to perform the following steps:
500
elementscom.me.rocks.queue.RocksQueue#head
500
elementsThe reason, that you use BigEndian
order for bytes, but uint64add
merge operator
assumes to have LITTLE_ENDIAN
- facebook/rocksdb#7243 and https://github.com/facebook/rocksdb/blob/main/utilities/merge_operators/uint64add.cc
I don't know how to fix it. Java Rocksdb API does not allow to create a new merge operator. Also, we cannot use LITTLE_ENDIAN
, because it breaks the queue order.
I saw golang implementation of the queue. They created the own merge operator, but we cannot do it. https://github.com/mijia/rocksq/blob/master/merge.go
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