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Engineering Lakehouses with Open Table Formats
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Apache XTable is a metadata translation solution designed to address the interoperability challenges inherent in open lakehouse architectures. Unlike table formats such as Apache Hudi, Apache Iceberg, or Delta Lake, which provide their own metadata structures and APIs, XTable is not a new format. Instead, it functions as a bridge between these formats, enabling seamless translation of metadata while preserving the underlying data files (Parquet) in their original storage layer. This design philosophy ensures that XTable works as an enabler for multi-format compatibility without introducing new storage or computational overhead.
The core idea behind XTable is to facilitate omnidirectional interoperability. This means it is not just limited to one-directional conversion but allows you to initiate conversion from any format to another without the need to copy or rewrite data. Hence, data written in one table format can be queried and processed as if it...