caigy commented on issue #8017:
URL: https://github.com/apache/rocketmq/issues/8017#issuecomment-2063709563
> > @bxfjb If you want to extend the size of `writeFileChannel` to make
`FileChannel.transferTo()` successful, you may try writing a byte at `position
- 1`:
> > ```java
> > writeFileChannel.write(ByteBuffer.wrap(new byte[]{0}), position - 1);
> > ```
>
> Eventually I decide to use `MappedByteBuffer` for
`FileChannel.transferFrom()`'s worse IO preformance in tests, could you pls
review the #8036?
In general mmap has a greater impact on page cache and may cause resource
contention with normal commit log. We need to evaluate the impact on overall
performance carefully.
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