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Questions - leveldb

Performance issue in Golang's key-value store (Badger DB)

In badgerDB, we have billions of keys of type string and values of type HashValueList. In our use case length of HashValueList might be in millions. We have to encode key and value in []byte before in...
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Vishal Jangid

go

key-value-store

leveldb

rocksdb

badgerdb

Votes: 0

Answers: 1

Latest Answer

If you want to iterate over a prefix really fast and collect the results, you should consider using the Stream framework within Badger. It uses many goroutines to make iteration as fast as disk would ...
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mrjn

what does it mean "class LEVELDB_EXPORT Status" in leveldb?

I found that "LEVELDB_EXPORT" is predefined in "export.h" . class LEVELDB_EXPORT DB{ } #define LEVELDB_EXPORT but i don't know which usage it is.
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buting

c++

leveldb

Votes: 0

Answers: 1

Latest Answer

It explained in git commit 4a7e7f5 : Add LEVELDB_EXPORT macro to export public symbols. gcc defaults to exporting all symbols, but other linkers do not. Adding the LEVELDB_EXPORT macro allows a projec...
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lawrshen

In LevelDB, are all the keys loaded in memory?

So, I have been reading about the implementation of LevelDB and other key-value stores which use the Log Structured Merge Tree in their implementation. I had a couple of questions on this: Are all th...
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Anon

implementation

key-value-store

leveldb

Votes: 0

Answers: 2

Latest Answer

So, I did find out that there is a memtable which holds the keys and values in memory and when this memtable becomes more than some specific size - the compaction process occurs. And so the memtable i...
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Anon

Using C++ protobuf formatted structure in leveldb. set/get operations

I'd like to make a POC of using leveldb in order to store key-value table of different data types in protobuf format. So far I was able to open the database file, and I also saw the get function with ...
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Zohar81

c++

protocol-buffers

leveldb

Votes: 0

Answers: 1

Latest Answer

You need to serialize the protobuf message into a binary string, i.e. SerilaizeToString, and use the Put method to write the binary string to LevelDB with a key. Then you can use the Get method to r...
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for_stack

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