Hi Pulsar Community,
I create a proposal that support ManagedCursorInfo compression. The proposal can be found: https://github.com/apache/pulsar/issues/14395 Motivation The cursor data is managed by ZooKeeper/etcd metadata store. When cursor data becomes more and more, the data size will increase and will take a lot of time to pull the data. Therefore, it is necessary to add compression for the cursor, which can reduce the size of data and reduce the time of pulling data. Goal Support use the LZ4/ZLIB/ZSTD/SNAPPY to compress the ManagedCursorInfo. Implementation - Cursor compression format [MAGIC_NUMBER] + [METADATA_SIZE] + [METADATA_PAYLOAD] + [MANAGED_CURSOR_INFO_PAYLOAD] - MAGIC_NUMBER Ox4779 - METADATA Add a named ManagedCursorInfoMetadata message to MLDataFormats.proto: message ManagedCursorInfoMetadata { required CompressionType compressionType = 1; required int32 uncompressedSize = 2; } Currently, these compressions have been supported, we only need to deal with compression and decompression of the ManagedCursorInfo data: - Get CursorInfo from the metadata store We will check the cursor data header, if it is compressed, we will parse the bytes data by compressed format, otherwise by the original way. - Add/Update CursorInfo to the metadata store The default is to use compression if the compression type is specified. Thanks, Zixuan
