Why doesn't Parquet currently support writing multiple row groups simultaneously?

Hi Parquet developers,

I have a question regarding the current implementation of Parquet. As far as I understand, Parquet does not support writing multiple row groups simultaneously. Could you please explain the reasoning behind this design choice?

Additionally, I am considering modifying Parquet to allow for multiple row groups to exist in memory and be flushed sequentially. From a high-level perspective, does this approach seem feasible? Are there any potential pitfalls or challenges I should be aware of?

Thank you for your time and assistance.

Best regards,

未指定源文件、测试或入口点。首先定位当前的 Parquet writer 和行组处理逻辑，然后跟踪行组是如何被保存和刷新的；要完成这项工作，需要一个经维护者确认的设计，以及关于可行性、内存使用、顺序和其他潜在问题的书面答案。

由索引模型根据 Issue 内容生成。