240624 use fwrite binlog

[luky116]

Summary by CodeRabbit

• New Features

  • Added a new method to check if the binlog is open.
  • Introduced a global constant for user space buffer size in file operations.

• Enhancements

  • Improved file operations with buffered writing for better performance and user experience.
  • Simplified internal binlog handling in consensus coordination for improved stability.

[coderabbitai]

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Review failed

The pull request is closed.

Walkthrough

The changes introduced buffering optimizations for file operations within the Binlog class, such as replacing methods with their buffered counterparts. Additionally, a new method IsOpened was added to the Binlog class, and a global constant for buffer size was defined. Various other files were updated to reflect these changes, improving performance and readability.

Changes

File Path	Change Summary
include/pika_binlog.h	Added IsOpened method to Binlog class
include/pika_define.h	Added global constant FWRITE_USER_SPACE_BUF_SIZE
src/pika_binlog.cc	Implemented IsOpened method and replaced file operations with their buffered counterparts
src/pika_consensus.cc	Simplified InternalAppendBinlog method to return whether the stable logger is open
src/pstd/include/env.h	Introduced NewBufferedWritableFile and BufferedAppendableFile methods, fixed typo in SequentialFile
src/pstd/src/env.cc	Added BufferedWritableFile class with methods for file operations and buffer management

Sequence Diagrams

Before Optimization

sequenceDiagram
participant App
participant Binlog
participant Env as Env Layer
App->>Binlog: Write to binlog
Binlog->>Env: NewWritableFile()
Env-->>Binlog: WritableFile instance
Binlog->>Env: AppendWritableFile()
Env-->>Binlog: Status
Binlog-->>App: Status

Loading

After Optimization

sequenceDiagram
participant App
participant Binlog
participant Env as Env Layer
App->>Binlog: Write to binlog
Binlog->>Env: NewBufferedWritableFile(FWRITE_USER_SPACE_BUF_SIZE)
Env-->>Binlog: BufferedWritableFile instance
Binlog->>Env: BufferedAppendableFile(FWRITE_USER_SPACE_BUF_SIZE, offset)
Env-->>Binlog: Status
Binlog-->>App: Status

Loading

Poem

🐇 In the land of code, the buffers now align,
Bytes flow smoothly, like a rabbit's rhyme.
With files more nimble and swift as air,
Our Binlogs flourish, with speed to spare.
Constants defined, methods refined,
Pika's performance, so well-designed! 🚀

---

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