Unsupported compression method for this build: LZ4

[Ameziane Hamlat]

Hi everyone,

I have this message when I try to scan my database created with a java application using rocksdb jni lib : Unsupported compression method for this build: LZ4

ldb --db=/data/database scan
Failed: Not implemented: Unsupported compression method for this build: LZ4

I tested with snappy and I had the same output message.

Here are the steps :

• git clone g...@github.com:facebook/rocksdb.git
• cd rocksdb
• make ldb sst_dump
  
• cd ldb /usr/local/bin
• cd sst_dump /usr/local/bin

ldb --db=/data/database scan
Failed: Not implemented: Unsupported compression method for this build: LZ4

Do you any idea how to resolve this issue ? 

[Jan Steemann]

Hi,

when building RocksDB and its tools (e.g. ldb) from source, both LZ4 support and Snappy support are turned off by default.

In order to enable them for your build, you will need to set the corresponding CMake variables, and also make sure that the libraries can be found by CMake:

https://github.com/facebook/rocksdb/blob/main/CMakeLists.txt#L69-L70

Best

J

[Jan Steemann]

Btw if you are not using CMake, but just make, if may be enough to install the LZ4 and/or Snappy libraries via the OS package manager, as described here:

https://github.com/facebook/rocksdb/blob/main/INSTALL.md#supported-platforms

I can't comment much on this because I am building using CMake.

[Ameziane Hamlat]

Thanks Jan, I installed lz4 on my VM and then forced the build with make, but still have the same error.