forked from lei.chen/myxce
No description
Rongsong Shen
708f2279e3
A standby applied replicated WAL entries via apply_wal_entry (the replay/ in-memory path) which restores entities + advances applied_lsn but NEVER writes the entry to the standby's WAL segment. The standby then ACKed (feeding the primary's commit majority) without persisting — a Raft durability violation: entries counted toward a commit could be lost on standby restart, and standby WAL files stayed empty (contradicting steering: log[i] = WAL segments for every node). This is why ctrl-2/ctrl-3 received + acked the streamed own-term NOOP yet kept empty seg-*.wal. Fix: new persist_wal_write_replicated(p, lsn, type, payload, len) writes the entry to the local WAL at the PRIMARY's lsn (no lsn-reassignment), with a self-consistent intra-segment CRC chain (the streamed entry carries no term/crc; each node chains independently and recovery validates intra-segment), fdatasyncs for durability, advances current_lsn = max(current_lsn, lsn+1), rotates segments, and does NOT re-broadcast. Wired into ha_apply_single_entry as persist(durable) -> apply(in-memory) -> ACK; on persist failure: no apply, no ACK (a standby never ACKs an entry it didn't persist). Covers single + batch catch-up; OPCode_replEntry has no separate apply path (allow-list only), so all live WAL apply now persists. Dedup guard (lsn+1<=current_lsn) makes re-streams idempotent while still ACKing. TDD: standby write -> drop persist_t -> reopen + persist_recover replays it (single, 3-entry crc chain, post-dedup); checkpoint/oversized rejected. Full controller suite green under ASAN; persist_wal_async / recovery / truncation / streamer / wire untouched. |
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|---|---|---|
| .claude | ||
| .kiro | ||
| .wolf | ||
| docs/superpowers/plans | ||
| ha/data | ||
| raft | ||
| src | ||
| .clang-format | ||
| .gitignore | ||
| CLAUDE.md | ||
| README.md | ||
1. commit 规则
- 每个人 fork 自己的 branch， 从自己的 branch 做 PR，review 完再 commit
2. code format
2.1. C
推荐使用 clang-format，公共配置放在源码里面 xce/.clang-format
（理论上直接使用源码里面 xce/.clang-format 文件格式不会变）
2.1.1. vscode 可以在配置中加上如下内容
"C_Cpp.clang_format_style": "WebKit",
"C_Cpp.clang_format_fallbackStyle": "WebKit",
2.1.2. vim & emacs
clang-format -style="{BasedOnStyle: webkit}" -i XX.c
2.2. golang
使用默认 gofmt
3. build environment and build (example of ubuntu)
3.1 build environment
- Install nix package management tool
sh <(curl -L https://nixos.org/nix/install) --daemon
- Edit /etc/nix/nix.conf to make sure
experimental-features = nix-command flakes
sandbox = true
sandbox-fallback = false
substituters = https://mirrors.ustc.edu.cn/nix-channels/store https://cache.nixos.org https://cache.nixos.org/
trusted-users = root <your account>
make sure that you have restarted nix-daemon service after you have changed /etc/nix/nix.conf
- Install socat and config ssh (for clone by ssh protocol)
nix profile add nixpkgs#socat
.ssh/config
Host gitea.shenrs.eu
HostName gitea.shenrs.eu
IdentityFile ~/.ssh/id_ed25519
ProxyCommand socat - openssl-connect:gitea.shenrs.eu:2022,snihost=gitea.shenrs.eu,verify=0
3.2 checkout source code
3.3 build (for package and release)
cd xce/src
# for build debug version
nix build --option sandbox false .#xcecore_debug
# for normal build
nix build --option sandbox false .#xcecore
You can find the generated binaries at =result= directory
3.4 build (for daily develop)
cd xce/src
nix develop
# using meson to generated build configuration (debug and address sanitize)
meson setup build --buildtype=debug -Db_sanitize=address
# run meson to build
meson compile -C build
# The generated files will be in build/
3.5 build AppImage package
cd xce/src
nix bundle --bundler github:ralismark/nix-appimage --option sandbox false .#xce
This will create all in one AppImage file which contains everything for package delivery.
4. misc
4.1. Windows remap ctrl and alt key
create a reg file, e.g. remapkey.reg
Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Keyboard Layout]
"Scancode Map"=hex:00,00,00,00,00,00,00,00,05,00,00,00,38,00,1d,00,1d,00,38,00,38,e0,1d,e0,1d,e0,38,e0,00,00,00,00
then double click remapkey.reg to import it. Restart OS.