作为在 AI 基础设施领域摸爬滚打五年的老兵,我见过太多团队在 API 调用上踩坑——延迟飙到 3 秒、账单超支 200%、服务挂了完全没备选方案。今天我就把服务发现与负载均衡在 AI 时代的工程实践讲透,并给出可落地的选型建议。先上结论:如果你在国内做 AI 应用开发,HolySheheep API 是目前性价比最高的统一入口。
HolySheep vs 官方 API vs 主流竞品对比
| 对比维度 | HolySheep API | OpenAI 官方 | Anthropic 官方 | 国内自建网关 |
|---|---|---|---|---|
| 汇率优势 | ¥1=$1(无损) | ¥7.3=$1(银行汇损) | ¥7.3=$1(银行汇损) | 需自研换汇 |
| 国内延迟 | <50ms 直连 | 200-500ms(跨境) | 300-600ms(跨境) | 20-100ms(看机房) |
| GPT-4.1 Output | $8/MTok | $8/MTok | 不支持 | $8/MTok(需加服务费) |
| Claude Sonnet 4.5 | $15/MTok | 不支持 | $15/MTok | $15/MTok(需加服务费) |
| Gemini 2.5 Flash | $2.50/MTok | 不支持 | 不支持 | $2.50/MTok(需加服务费) |
| DeepSeek V3.2 | $0.42/MTok | 不支持 | 不支持 | 不支持 |
| 支付方式 | 微信/支付宝/银行卡 | 国际信用卡 | 国际信用卡 | 对公转账 |
| 适合人群 | 国内中小团队/个人开发者 | 出海企业/外企 | 出海企业/外企 | 大厂/有运维团队 |
从上表可以看出,HolySheep API 在国内场景下拥有碾压级的优势:汇率无损、延迟极低、支持模型全面、支付方式友好。立即注册即可获得首月赠额度,新手友好度拉满。
为什么 AI 时代必须重新设计服务发现
传统微服务的服务发现是“找活人”——负载均衡算法(Round-Robin、Least-Connections)假设所有实例能力一致。但 AI API 调用完全不是这回事:
- 模型异构性:GPT-4.1 输出速度约 40 Tokens/s,Claude 4.5 约 35 Tokens/s,DeepSeek V3.2 能跑到 80 Tokens/s
- 成本差异巨大:DeepSeek V3.2 只要 $0.42/MTok,Claude Sonnet 4.5 要 $15/MTok,差了 35 倍
- 限流策略不同:各厂商 RPM/TPM 限制各异,GPT-4.1 可能 500 RPM,Gemini 2.5 Flash 能到 1000 RPM
- 容错要求更高:单 API 宕机可能导致整个业务流程中断
我曾在某电商公司负责 AI 搜索优化,最初用硬编码方式调用 OpenAI,结果 QPS 上到 200 就开始触发限流,延迟飙到 8 秒。后来改用 HolySheep 的统一网关,延迟稳定在 80ms 以内,成本下降了 62%。
服务发现的四种核心架构模式
1. 客户端负载均衡(最轻量)
每个客户端 SDK 内置服务发现逻辑,适合请求量可控的场景。
# Python 示例:使用 HolySheheep API 实现智能路由
import openai
import os
from collections import defaultdict
import time
class AILoadBalancer:
def __init__(self):
# HolySheheep 统一入口,支持所有主流模型
self.base_url = "https://api.holysheep.ai/v1"
self.client = openai.OpenAI(
api_key=os.environ.get("HOLYSHEEP_API_KEY"), # YOUR_HOLYSHEEP_API_KEY
base_url=self.base_url
)
# 路由配置:模型 -> 权重
self.route_weights = {
"gpt-4.1": 0.3,
"claude-sonnet-4.5": 0.2,
"gemini-2.5-flash": 0.3,
"deepseek-v3.2": 0.2
}
self.call_counts = defaultdict(int)
def weighted_round_robin(self):
"""加权轮询:根据成本和性能分配请求"""
# 统计各模型调用次数
for model in self.route_weights:
self.call_counts[model] += 1
# 优先使用低成本高性能模型
if self.call_counts["deepseek-v3.2"] % 3 == 0:
return "deepseek-v3.2"
return "gemini-2.5-flash"
def chat(self, prompt, model=None):
if not model:
model = self.weighted_round_robin()
response = self.client.chat.completions.create(
model=model,
messages=[{"role": "user", "content": prompt}],
max_tokens=500
)
return response.choices[0].message.content
使用示例
balancer = AILoadBalancer()
result = balancer.chat("解释负载均衡原理", model="deepseek-v3.2")
print(result)
2. 服务端代理网关(生产级推荐)
所有请求经过统一网关,网关负责模型选择、健康检查、熔断降级。
# Node.js 示例:构建 AI API 网关(使用 Express + HolySheheep)
const express = require('express');
const axios = require('axios');
const app = express();
app.use(express.json());
// HolySheheep API 配置
const HOLYSHEEP_BASE_URL = 'https://api.holysheep.ai/v1';
const HOLYSHEEP_API_KEY = process.env.HOLYSHEEP_API_KEY; // YOUR_HOLYSHEEP_API_KEY
// 模型成本配置($/MTok)
const MODEL_COSTS = {
'gpt-4.1': 8.0,
'claude-sonnet-4.5': 15.0,
'gemini-2.5-flash': 2.5,
'deepseek-v3.2': 0.42
};
// 简单加权随机算法
function selectModel() {
const models = ['deepseek-v3.2', 'deepseek-v3.2', 'deepseek-v3.2',
'gemini-2.5-flash', 'gemini-2.5-flash',
'gpt-4.1', 'claude-sonnet-4.5'];
return models[Math.floor(Math.random() * models.length)];
}
// 健康检查端点
app.get('/health', (req, res) => {
res.json({ status: 'ok', timestamp: Date.now() });
});
// 统一 AI 接口
app.post('/v1/chat', async (req, res) => {
const { prompt, model, budget_tolerance } = req.body;
// 如果未指定模型,使用加权随机选择
const selectedModel = model || selectModel();
// 成本预估(假设平均 1000 tokens 输出)
const estimatedCost = MODEL_COSTS[selectedModel] * 1; // 1 MTok
const userBudget = budget_tolerance || 1.0; // 默认 $1容忍度
if (estimatedCost > userBudget) {
return res.status(400).json({
error: 'Budget exceeded',
estimated: $${estimatedCost.toFixed(4)},
tolerance: $${userBudget},
suggestion: 'Consider using deepseek-v3.2 ($0.42/MTok)'
});
}
try {
const response = await axios.post(
${HOLYSHEEP_BASE_URL}/chat/completions,
{
model: selectedModel,
messages: [{ role: 'user', content: prompt }],
max_tokens: 2000
},
{
headers: {
'Authorization': Bearer ${HOLYSHEEP_API_KEY},
'Content-Type': 'application/json'
},
timeout: 30000
}
);
res.json({
...response.data,
routing: {
model: selectedModel,
estimated_cost: estimatedCost
}
});
} catch (error) {
console.error('HolySheheep API Error:', error.message);
// 熔断降级:尝试备选模型
const fallbackModel = selectedModel === 'deepseek-v3.2'
? 'gemini-2.5-flash'
: 'deepseek-v3.2';
try {
const fallback = await axios.post(
${HOLYSHEEP_BASE_URL}/chat/completions,
{
model: fallbackModel,
messages: [{ role: 'user', content: prompt }],
max_tokens: 2000
},
{
headers: {
'Authorization': Bearer ${HOLYSHEEP_API_KEY},
'Content-Type': 'application/json'
}
}
);
res.json({
...fallback.data,
routing: { model: fallbackModel, fallback: true }
});
} catch (fallbackError) {
res.status(502).json({ error: 'All models unavailable' });
}
}
});
const PORT = process.env.PORT || 3000;
app.listen(PORT, () => {
console.log(AI Gateway running on port ${PORT});
console.log(Using HolySheheep: ${HOLYSHEEP_BASE_URL});
});
3. 基于延迟的动态路由
# Go 示例:延迟感知的自适应路由
package main
import (
"context"
"fmt"
"time"
"github.com/sashabaranov/go-openai"
)
type ModelEndpoint struct {
Name string
Client *openai.Client
AvgLatency time.Duration
RequestCount int64
}
type AdaptiveRouter struct {
endpoints map[string]*ModelEndpoint
}
func NewAdaptiveRouter(apiKey string) *AdaptiveRouter {
config := openai.DefaultConfig(apiKey)
config.BaseURL = "https://api.holysheep.ai/v1" // HolySheheep 统一入口
return &AdaptiveRouter{
endpoints: map[string]*ModelEndpoint{
"gpt-4.1": {
Name: "gpt-4.1",
Client: openai.NewClientWithConfig(config),
},
"deepseek-v3.2": {
Name: "deepseek-v3.2",
Client: openai.NewClientWithConfig(config),
},
},
}
}
func (r *AdaptiveRouter) RouteByLatency(prompt string) (string, error) {
// 选择延迟最低的模型
var bestModel string
var minLatency := time.Hour
for name, ep := range r.endpoints {
if ep.AvgLatency < minLatency {
minLatency = ep.AvgLatency
bestModel = name
}
}
// 模拟请求并更新延迟
start := time.Now()
_, err := r.endpoints[bestModel].Client.CreateChatCompletion(
context.Background(),
openai.ChatCompletionRequest{
Model: bestModel,
Messages: []openai.ChatCompletionMessage{
{Role: "user", Content: prompt},
},
},
)
latency := time.Since(start)
r.endpoints[bestModel].AvgLatency = (r.endpoints[bestModel].AvgLatency + latency) / 2
r.endpoints[bestModel].RequestCount++
fmt.Printf("Routed to %s, latency: %v\n", bestModel, latency)
return bestModel, err
}
func main() {
router := NewAdaptiveRouter("YOUR_HOLYSHEEP_API_KEY")
model, _ := router.RouteByLatency("Hello, world!")
fmt.Printf("Selected model: %s\n", model)
}
4. 多级降级策略
当主模型不可用时,自动降级到备选方案,保证服务可用性。
# Python 多级降级示例
FALLBACK_CHAIN = [
{"model": "gpt-4.1", "timeout": 10, "max_cost": 0.5}, # 主选
{"model": "claude-sonnet-4.5", "timeout": 12, "max_cost": 0.8},
{"model": "gemini-2.5-flash", "timeout": 5, "max_cost": 0.2}, # 快速备选
{"model": "deepseek-v3.2", "timeout": 8, "max_cost": 0.05}, # 成本优先
]
def call_with_fallback(prompt, max_budget=1.0):
"""带预算感知的多级降级"""
remaining_budget = max_budget
for option in FALLBACK_CHAIN:
if option["max_cost"] > remaining_budget:
continue
try:
start = time.time()
response = client.chat.completions.create(
model=option["model"],
messages=[{"role": "user", "content": prompt}],
timeout=option["timeout"]
)
latency = time.time() - start
return {
"success": True,
"model": option["model"],
"latency_ms": round(latency * 1000),
"content": response.choices[0].message.content
}
except Exception as e:
print(f"Model {option['model']} failed: {e}, trying next...")
continue
return {"success": False, "error": "All models exhausted"}
负载均衡核心算法实战
AI 场景下的负载均衡需要考虑三个维度:延迟、成本、可用率。我推荐使用"延迟-成本双目标优化"算法。
# 综合评分算法
def score_model(model_stats, target_latency_ms=200, target_cost=1.0):
"""
综合评分 = 延迟得分 * 0.4 + 成本得分 * 0.3 + 可用率得分 * 0.3
延迟越低、成本越低、可用率越高,分数越高
"""
latency_score = max(0, 1 - model_stats["avg_latency"] / target_latency_ms)
cost_score = max(0, 1 - model_stats["cost_per_1k"] / target_cost)
availability_score = model_stats["success_rate"]
weighted_score = (
latency_score * 0.4 +
cost_score * 0.3 +
availability_score * 0.3
)
return round(weighted_score, 3)
模型评分示例
models = {
"gpt-4.1": {"avg_latency": 150, "cost_per_1k": 0.008, "success_rate": 0.99},
"deepseek-v3.2": {"avg_latency": 80, "cost_per_1k": 0.00042, "success_rate": 0.98},
"gemini-2.5-flash": {"avg_latency": 120, "cost_per_1k": 0.0025, "success_rate": 0.995},
}
for model, stats in models.items():
score = score_model(stats)
print(f"{model}: {score}")
服务健康检查实现
# 健康检查与自动摘除
import asyncio
from datetime import datetime, timedelta
class HealthChecker:
def __init__(self, api_base="https://api.holysheep.ai/v1", api_key="YOUR_HOLYSHEEP_API_KEY"):
self.base_url = api_base
self.api_key = api_key
self.model_health = {}
self.failure_threshold = 3 # 连续失败3次摘除
self.recovery_timeout = 60 # 60秒后尝试恢复
async def check_model(self, model_name):
"""检查单个模型健康状态"""
try:
response = await self._make_request(model_name)
self.model_health[model_name] = {
"healthy": True,
"last_success": datetime.now(),
"consecutive_failures": 0,
"latency_ms": response.get("latency", 0)
}
return True
except Exception as e:
health = self.model_health.get(model_name, {})
failures = health.get("consecutive_failures", 0) + 1
self.model_health[model_name] = {
"healthy": failures < self.failure_threshold,
"last_failure": datetime.now(),
"consecutive_failures": failures,
"error": str(e)
}
return False
def get_healthy_models(self):
"""获取当前健康的模型列表"""
healthy = []
for model, health in self.model_health.items():
if health.get("healthy", False):
healthy.append(model)
return healthy
async def continuous_monitoring(self, interval=30):
"""持续监控所有模型"""
models = ["gpt-4.1", "claude-sonnet-4.5", "gemini-2.5-flash", "deepseek-v3.2"]
while True:
results = await asyncio.gather(
*[self.check_model(m) for m in models],
return_exceptions=True
)
healthy = self.get_healthy_models()
print(f"[{datetime.now()}] Healthy models: {healthy}")
# 自动恢复检测
for model, health in self.model_health.items():
if not health.get("healthy") and health.get("consecutive_failures") >= self.failure_threshold:
last_failure = health.get("last_failure")
if last_failure and (datetime.now() - last_failure).seconds > self.recovery_timeout:
print(f"Attempting recovery for {model}")
await self.check_model(model)
await asyncio.sleep(interval)
使用示例
async def main():
checker = HealthChecker()
await checker.continuous_monitoring()
asyncio.run(main())
常见报错排查
在接入 HolySheheep API 和实现服务发现时,我整理了团队最常遇到的 8 类问题及解决方案。
错误 1:401 Authentication Error(认证失败)
原因:API Key 填写错误或未设置环境变量。
# ❌ 错误写法
client = openai.OpenAI(api_key="sk-xxxxx") # 可能用了其他平台的key
✅ 正确写法
import os
client = openai.OpenAI(
api_key=os.environ.get("HOLYSHEEP_API_KEY"), # YOUR_HOLYSHEEP_API_KEY
base_url="https://api.holysheep.ai/v1" # 必须指定base_url
)
错误 2:429 Rate Limit Exceeded(限流)
原因:请求频率超过模型限制,GPT-4.1 默认 500 RPM。
# ❌ 无限流的重试
for prompt in prompts:
response = client.chat.completions.create(model="gpt-4.1", messages=[...])
✅ 带退避策略的重试
import time
import random
def call_with_retry(model, messages, max_retries=3):
for attempt in range(max_retries):
try:
return client.chat.completions.create(model=model, messages=messages)
except openai.RateLimitError:
wait_time = (2 ** attempt) + random.uniform(0, 1)
print(f"Rate limited, waiting {wait_time:.1f}s...")
time.sleep(wait_time)
# 降级到其他模型
fallback_models = ["gemini-2.5-flash", "deepseek-v3.2"]
for model in fallback_models:
try:
return client.chat.completions.create(model=model, messages=messages)
except:
continue
raise Exception("All models exhausted")
错误 3:504 Gateway Timeout(网关超时)
原因:请求体过大或模型处理时间过长。
# ❌ 默认超时设置
response = client.chat.completions.create(model="gpt-4.1", messages=messages)
✅ 自定义超时(单位:秒)
from openai import OpenAI
client = OpenAI(
api_key=os.environ.get("HOLYSHEEP_API_KEY"),
base_url="https://api.holysheep.ai/v1",
timeout=60.0 # 设置60秒超时
)
或者针对单个请求设置超时
try:
response = client.chat.completions.create(
model="gpt-4.1",
messages=messages,
max_tokens=500, # 限制输出 token 数
timeout=30.0
)
except openai.APITimeoutError:
print("Request timed out, consider reducing max_tokens")
错误 4:模型不存在(Model Not Found)
原因:使用了 HolySheheep 不支持的模型名称。
# ❌ 错误:使用官方模型名
response = client.chat.completions.create(
model="gpt-4-turbo", # 官方命名
messages=messages
)
✅ 正确:使用 HolySheheep 支持的模型名
response = client.chat.completions.create(
model="gpt-4.1", # HolySheheep 统一命名
messages=messages
)
查看支持的模型列表
models = client.models.list()
for model in models.data:
print(f"Available: {model.id}")
错误 5:余额不足(Insufficient Balance)
原因:账户余额耗尽或未充值。
# ❌ 没有余额检查直接调用
response = client.chat.completions.create(model="gpt-4.1", messages=messages)
✅ 调用前检查余额
import httpx
def check_balance_and_call():
# 查询余额(需要 API Key)
headers = {"Authorization": f"Bearer {os.environ.get('HOLYSHEEP_API_KEY')}"}
try:
# 尝试一个最小请求来验证余额
response = client.chat.completions.create(
model="deepseek-v3.2", # 用最便宜的模型测试
messages=[{"role": "user", "content": "hi"}],
max_tokens=1
)
return response
except openai.AuthenticationError as e:
if "insufficient" in str(e).lower():
print("余额不足,请前往 https://www.holysheep.ai/register 充值")
# 跳转到充值页面
import webbrowser
webbrowser.open("https://www.holysheep.ai/register")
raise
错误 6:上下文长度超限(Context Length Exceeded)
原因:输入文本超过了模型支持的最大 Token 数。
# ❌ 没有检查输入长度
long_text = open("huge_document.txt").read() # 可能几十 MB
response = client.chat.completions.create(
model="gpt-4.1",
messages=[{"role": "user", "content": long_text}]
)
✅ 使用 tiktoken 估算并截断
import tiktoken
def truncate_to_limit(text, model="gpt-4.1", max_tokens=6000):
"""截断文本以符合模型上下文限制"""
encoding = tiktoken.encoding_for_model("gpt-4.1")
tokens = encoding.encode(text)
if len(tokens) <= max_tokens:
return text
truncated_tokens = tokens[:max_tokens]
return encoding.decode(truncated_tokens)
使用
safe_text = truncate_to_limit(long_text, max_tokens=6000)
response = client.chat.completions.create(
model="gpt-4.1",
messages=[{"role": "user", "content": safe_text}]
)
错误 7:网络连接被拒绝(Connection Refused)
原因:代理配置错误或防火墙阻断。
# ❌ 没有配置代理或超时
client = openai.OpenAI(api_key=api_key, base_url="https://api.holysheep.ai/v1")
✅ 配置代理和超时
client = openai.OpenAI(
api_key=api_key,
base_url="https://api.holysheep.ai/v1",
http_client=httpx.Client(
proxies="http://127.0.0.1:7890", # 你的代理地址
timeout=30.0,
verify=True # 如果证书问题设为 False
)
)
国内直连不需要代理
client = openai.OpenAI(api_key=api_key, base_url="https://api.holysheep.ai/v1")
错误 8:并发请求时的 Connection Reset
原因:高并发下连接池耗尽。
# ❌ 默认连接池过小
client = openai.OpenAI(api_key=api_key, base_url="https://api.holysheep.ai/v1")
✅ 增大连接池
from openai import OpenAI
import httpx
配置更大的连接池
mounts = {
"http://": httpx.HTTPTransport(retries=3),
"https://": httpx.HTTPTransport(retries=3, pool_limits=httpx.PoolLimits(hard_limit=100, soft_limit=50))
}
client = OpenAI(
api_key=api_key,
base_url="https://api.holysheep.ai/v1",
http_client=httpx.Client(mounts=mounts, timeout=60.0)
)
或使用异步客户端
import asyncio
from openai import AsyncOpenAI
async_client = AsyncOpenAI(
api_key=api_key,
base_url="https://api.holysheep.ai/v1",
max_connections=100,
max_keepalive_connections=20
)
async def concurrent_calls(prompts):
tasks = [async_client.chat.completions.create(
model="deepseek-v3.2",
messages=[{"role": "user", "content": p}]
) for p in prompts]
return await asyncio.gather(*tasks, return_exceptions=True)
性能监控与告警配置
# Prometheus + Grafana 监控配置示例
from prometheus_client import Counter, Histogram, Gauge
import time
定义指标
REQUEST_COUNT = Counter('ai_api_requests_total', 'Total API requests', ['model', 'status'])
REQUEST_LATENCY = Histogram('ai_api_latency_seconds', 'API latency', ['model'])
TOKEN_USAGE = Counter('ai_tokens_used_total', 'Total tokens used', ['model', 'type'])
CREDIT_BALANCE = Gauge('ai_credit_balance', 'Remaining credit balance')
def monitor_middleware(request_func):
"""监控中间件"""
def wrapper(model, messages, *args, **kwargs):
start = time.time()
try:
result = request_func(model, messages, *args, **kwargs)
latency = time.time() - start
REQUEST_COUNT.labels(model=model, status='success').inc()
REQUEST_LATENCY.labels(model=model).observe(latency)
# 记录 token 使用
if hasattr(result, 'usage'):
TOKEN_USAGE.labels(model=model, type='prompt').inc(result.usage.prompt_tokens)
TOKEN_USAGE.labels(model=model, type='completion').inc(result.usage.completion_tokens)
return result
except Exception as e:
REQUEST_COUNT.labels(model=model, status='error').inc()
raise
return wrapper
告警规则(Prometheus)
groups:
- name: ai_api_alerts
rules:
- alert: HighErrorRate
expr: rate(ai_api_requests_total{status="error"}[5m]) > 0.1
for: 1m
annotations:
summary: "High error rate on {{ $labels.model }}"
- alert: HighLatency
expr: histogram_quantile(0.95, rate(ai_api_latency_seconds_bucket[5m])) > 5
for: 5m
annotations:
summary: "High latency on {{ $labels.model }}"
成本优化实战技巧
我在多个项目中发现,80% 的成本浪费来自三个地方:模型选择不当、Token 浪费、缺少缓存。我总结了一套"三刀流"优化法。
第一刀:智能模型路由
ROUTING_RULES = {
# 简单问答 -> 用最便宜的
"simple_qa": ["deepseek-v3.2"],
# 代码生成 -> 用性能强的
"code_gen": ["gpt-4.1", "claude-sonnet-4.5"],
# 长文本摘要 -> 用性价比的
"summarize": ["gemini-2.5-flash", "deepseek-v3.2"],
# 默认兜底
"default": ["deepseek-v3.2", "gemini-2.5-flash"]
}
def route_task(task_type, context_length=1000):
"""根据任务类型和上下文长度选择最优模型"""
candidates = ROUTING_RULES.get(task_type, ROUTING_RULES["default"])
# 长上下文优先选择支持 128K 的模型
if context_length > 30000:
return "claude-sonnet-4.5"
return candidates[0] # 返回第一个候选模型
第二刀:Token 压缩
# 提示词模板优化
❌ 冗余描述
SYSTEM_PROMPT = """
你是一位非常专业、资深、经验丰富、知识渊博的 AI 助手。
你的职责是帮助用户解答各种问题和完成任务。
请务必提供准确、详细、有用的信息。
"""
✅ 精简高效
SYSTEM_PROMPT = "AI助手,回答简洁准确。" # 从 200 tokens 压缩到 8 tokens
使用 Few-shot 示例时也要精简
❌ 详细示例
EXAMPLES = [
{"input": "如何学习Python?", "output": "学习Python的步骤如下:1. 安装Python..."},
]
✅ 压缩示例
EXAMPLES = [
{"input": "学Python", "output": "1.装Python 2.看文档 3.写代码"}
]
第三刀:响应缓存
# LRU 缓存相同语义请求
from functools import lru_cache
import hashlib
@lru_cache(maxsize=10000)
def cached_hash(prompt):
"""缓存请求的哈希值"""
return hashlib.md5(prompt.encode()).hexdigest()
语义缓存(使用 embeddings)
import numpy as np
class SemanticCache:
def __init__(self, threshold=0.95):
self.cache = {}
self.embeddings = {}
self.threshold = threshold
def get_embedding(self, text):
"""获取文本向量(使用小模型)"""
response = client.embeddings.create(
model="text-embedding-3-small",
input=text
)
return np.array(response.data[0].embedding)
def find_similar(self, prompt):
"""查找相似缓存"""
prompt_emb = self.get_embedding(prompt)
for cached_prompt, (cached_emb, response) in self.cache.items():
similarity = np.dot(prompt_emb, cached_emb)
if similarity > self.threshold:
return response
return None
def store(self, prompt, response):
"""存储到缓存"""
self.cache[prompt] = (self.get_embedding(prompt), response)
工程实践建议总结
回顾我过去一年在多个项目中的实践经验,关于 AI 时代的服务发现与负载均衡,我有几点肺腑之言: