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feat:separation of fast and slow commands #2162

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dingxiaoshuai123
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@dingxiaoshuai123 dingxiaoshuai123 commented Nov 24, 2023

issue : #2085
issue : #2174

1 separation of fast and slow commands
2 modify the codis proxy & pika
3 add slow command queue and slow command thread pool in pika

@dingxiaoshuai123 dingxiaoshuai123 changed the title separation of fast and slow commands feat : separation of fast and slow commands Nov 24, 2023
@dingxiaoshuai123 dingxiaoshuai123 changed the title feat : separation of fast and slow commands feat:separation of fast and slow commands Nov 24, 2023
@github-actions github-actions bot added the ✏️ Feature New feature or request label Nov 24, 2023
@@ -491,18 +507,23 @@ func (s *sharedBackendConn) BackendConn(database int32, seed uint, must bool) *B
type sharedBackendConnPool struct {
config *Config
parallel int
quick int
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补充注释

backend_primary_parallel = 1
backend_replica_parallel = 1
backend_primary_parallel = 2
backend_primary_quick = 1
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补充注释

opTable[r.Name] = r
}

if cmdlist == "" {
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调用len判断字符串为空

conf/pika.conf Outdated
@@ -23,6 +23,13 @@ thread-num : 1
# are dedicated to handling user requests.
thread-pool-size : 12

# Size of the low level thread pool, The threads within this pool
# are dedicated to handling slow user requests.
low-level-thread-pool-size : 4
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改为slowcmdthreadpool

include/pika_conf.h Outdated Show resolved Hide resolved
include/pika_conf.h Outdated Show resolved Hide resolved
} else if (set_item == "slow-cmd-list") {
g_pika_conf->SetSlowCmd(value);
ret = "+OK\r\n";
}else if (set_item == "max-cache-files") {
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空格

@AlexStocks
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todo:
1 seperate the read and write command;
2 elastic the slow command thread pool

include/pika_conf.h Outdated Show resolved Hide resolved
src/pika_server.cc Outdated Show resolved Hide resolved
src/pika_server.cc Show resolved Hide resolved
src/pika_server.cc Outdated Show resolved Hide resolved
codis/pkg/proxy/backend.go Show resolved Hide resolved
include/pika_conf.h Outdated Show resolved Hide resolved
@@ -50,6 +51,8 @@ int string2int(const char* s, size_t slen, unsigned long* lval);
int d2string(char* buf, size_t len, double value);
int string2d(const char* s, size_t slen, double* dval);
std::vector<std::string>& StringSplit(const std::string& s, char delim, std::vector<std::string>& elems);
void StringSplit2Set(const std::string&s, char delim, std::unordered_set<std::string>& elems);
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elems这个换成 * 把,一般需要修改的值的用引用+const修饰,需要修改值的用 *

src/pstd/include/pstd_string.h Outdated Show resolved Hide resolved
@@ -50,6 +51,8 @@ int string2int(const char* s, size_t slen, unsigned long* lval);
int d2string(char* buf, size_t len, double value);
int string2d(const char* s, size_t slen, double* dval);
std::vector<std::string>& StringSplit(const std::string& s, char delim, std::vector<std::string>& elems);
void StringSplit2Set(const std::string&s, char delim, std::unordered_set<std::string>& elems);
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这个delim也尽量不要值传递把,看下用指针还是引用

src/pstd/include/pstd_string.h Show resolved Hide resolved
codis/config/proxy.toml Outdated Show resolved Hide resolved
codis/config/proxy.toml Outdated Show resolved Hide resolved
Mixficsol
Mixficsol previously approved these changes Dec 4, 2023
codis/pkg/proxy/config.go Show resolved Hide resolved
// Print the current low level queue size if it exceeds QUEUE_SIZE_THRESHOLD_PERCENTAGE/100 of the maximum queue size.
size_t low_level_queue_cur_size = LowLevelThreadPoolCurQueueSize();
size_t low_level_queue_max_size = LowLevelThreadPoolMaxQueueSize();
size_t low_level_queue_thread_hold = (low_level_queue_max_size / 100) * QUEUE_SIZE_THRESHOLD_PERCENTAGE;
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变量名是想写low_level_queue_thresh_hold?

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这里的名字都要改成slow_cmd相关,下次提交的时候改

src/pika_client_conn.cc Show resolved Hide resolved
if quick := s.owner.quick; quick > 0 {
if isQuick {
i = seed % uint(quick)
if bc := parallel[i]; bc.IsConnected() {
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这个地方,原来是在一个循环里,如果一个bc无效会继续找下一个,这里是不是也该加一下。

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这里传入的seed是用key做的hash,为了保证pipeline中相同key的有序,所以没有找下一个连接。之前不知道为什么是进行了遍历,所以新添加的代码没有进行循环找conn

@@ -55,10 +61,14 @@ const (
FlagMasterOnly
FlagMayWrite
FlagNotAllow
FlagQuick
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Quick和Slow不是互斥的吗?需要两个都定义吗?

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理论上只需要FlagSlow即可,但是为了简化一些逻辑就加了个FlagQuick,这样在一些打印快慢列表的函数中逻辑更清晰点,不需要的话删除也行

@AlexStocks
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继续改进下,解决下文件冲突

@dingxiaoshuai123 dingxiaoshuai123 force-pushed the split_fast_slow_cmd_codis branch 4 times, most recently from 62d84fa to 8df24fc Compare December 21, 2023 07:30
@github-actions github-actions bot added the 📒 Documentation Improvements or additions to documentation label Dec 21, 2023
@dingxiaoshuai123 dingxiaoshuai123 force-pushed the split_fast_slow_cmd_codis branch 4 times, most recently from bb78f5f to 719192d Compare December 21, 2023 08:25
return bc
}
}
}
}
return s.backend.bc.BackendConn(database, seed, true)
// fix:https://github.com/OpenAtomFoundation/pika/issues/2174
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这行去掉吧 可以放在comment中

flagString := "FlagQuick"
if flag&FlagSlow != 0 {
reverseFlag = FlagQuick
flagString = "FlagSlow"
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为啥FlagQuick 没有引号 FlagSlow有引号 这是有什么特殊的考虑吗

@AlexStocks AlexStocks merged commit c1917c7 into OpenAtomFoundation:unstable Jan 18, 2024
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bigdaronlee163 pushed a commit to bigdaronlee163/pika that referenced this pull request Jun 8, 2024
* split fast and slow cmd in codis

* separation of fast and slow commands

* Resolve formatting issues.

* use the unordered_set instead of unordered_map

* fix:disorderly execution of the same key when using pipeline

* update go 1.18 to go 1.21

* change proxy.go & mapper.go
cheniujh pushed a commit to cheniujh/pika that referenced this pull request Sep 24, 2024
* split fast and slow cmd in codis

* separation of fast and slow commands

* Resolve formatting issues.

* use the unordered_set instead of unordered_map

* fix:disorderly execution of the same key when using pipeline

* update go 1.18 to go 1.21

* change proxy.go & mapper.go
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6 participants