Xuanwo

Not all fs support `O_DIRECT`, such as `tmpfs` which we have tested over it. ``` test storage::secondary::column::primitive_column_factory::tests::test_scan_rle_i32 ... FAILED test storage::secondary::rowset::rowset_iterator::tests::test_rowset_iterator_with_filter ... FAILED test storage::secondary::column::primitive_column_factory::tests::test_scan_i32 ... FAILED test storage::secondary::rowset::rowset_iterator::tests::test_rowset_iterator ......

So we don't need to care about `index` here? It seems that `IoBackend` only affects column files: ```rust let column = Column::new( ColumnIndex::from_bytes(&index_content)?, match io_backend { IOBackend::NormalRead => { ColumnReadableFile::NormalRead(Arc::new(Mutex::new(file.into_std().await)))...

I have lost interest in this issue. Feel free to take this~ Previous work: https://github.com/risinglightdb/risinglight/pull/532

check failed with `Template render error: (unknown path) [Line 7, Column 35]`

It looks like you return a empty string, maybe this cause a problem ? https://github.com/hexojs/hexo-generator-feed/commit/d0a75316d4df1136b74f4bd3e316b99d40fc7bef#diff-2d50619f126a12162223a89f7b15c54eL7

@zklhp you can add this to the site~

How about making it a new function like: ```rust #[cfg(test)] pub fn root_with_collect(event: &'static str, collect: GlobalCollect) -> (Self, Collector) {} ```

Does it mean to support parsing levels from `RUST_LOG`?

To migrate from `tokio-tracing`, I think we need this feature.

This PR is discontinued for so long, any updates here? Do we have a plan to get it merged?