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Flink FSStateBackend Checkpointing Buffer size


Hi,

I am trying to use Gluster File System as my FileSystem backed by RocksDB as state backend.
 
I can see from FsCheckpointStateOutputStream that the DEFAULT_WRITE_BUFFER_SIZE = 4096.

Is the buffer size configurable in any way? Any idea about the checkpointing performance with default buffer size? 

Thanks,

Chirag