exa-reliability-patterns（exa 可靠性模式）

Exa Reliability Patterns

Overview

Production reliability patterns for Exa neural search integrations. Exa's search-focused API has unique failure modes: query relevance degradation, empty result sets, and variable response times based on query complexity.

Prerequisites

• Exa API configured
• Caching infrastructure (Redis recommended)
• Understanding of search quality metrics

Instructions

Step 1: Cache Search Results with TTL

Search results for the same query are stable over short periods. Caching reduces API calls and latency.

import hashlib, json, time

class ExaSearchCache:
    def __init__(self, redis_client, default_ttl=300):  # 300: timeout: 5 minutes
        self.r = redis_client
        self.ttl = default_ttl

    def _key(self, query: str, **params) -> str:
        data = json.dumps({"q": query, **params}, sort_keys=True)
        return f"exa:search:{hashlib.sha256(data.encode()).hexdigest()}"

    def search(self, exa_client, query: str, **params):
        key = self._key(query, **params)
        cached = self.r.get(key)
        if cached:
            return json.loads(cached)
        results = exa_client.search(query, **params)
        self.r.setex(key, self.ttl, json.dumps(results.to_dict()))
        return results

Step 2: Query Fallback Chain

If neural search returns low-relevance results, fall back to keyword search, then to cached results.

from exa_py import Exa

def resilient_search(exa: Exa, query: str, min_results: int = 3):
    # Try neural search first
    results = exa.search(query, type="neural", num_results=10)
    if len(results.results) >= min_results:
        return results

    # Fall back to keyword search
    results = exa.search(query, type="keyword", num_results=10)
    if len(results.results) >= min_results:
        return results

    # Fall back to broader query with autoprompt
    results = exa.search(query, type="neural", use_autoprompt=True, num_results=10)
    return results

Step 3: Retry with Exponential Backoff

Exa returns 429 on rate limits and 5xx on transient failures.

import time, random

def exa_with_retry(fn, max_retries=3, base_delay=1.0):
    for attempt in range(max_retries + 1):
        try:
            return fn()
        except Exception as e:
            status = getattr(e, 'status_code', 0)
            if status == 429 or status >= 500:  # 500: HTTP 429 Too Many Requests
                if attempt == max_retries:
                    raise
                delay = base_delay * (2 ** attempt) + random.uniform(0, 0.5)
                time.sleep(delay)
            else:
                raise

Step 4: Result Quality Monitoring

Track search quality metrics to detect degradation before users notice.

class SearchQualityMonitor:
    def __init__(self, redis_client):
        self.r = redis_client

    def record(self, query: str, result_count: int, has_content: bool):
        key = f"exa:quality:{time.strftime('%Y-%m-%d-%H')}"
        self.r.hincrby(key, "total", 1)
        if result_count == 0:
            self.r.hincrby(key, "empty", 1)
        if not has_content:
            self.r.hincrby(key, "no_content", 1)
        self.r.expire(key, 86400 * 7)  # 86400: timeout: 24 hours

    def get_health(self) -> dict:
        key = f"exa:quality:{time.strftime('%Y-%m-%d-%H')}"
        stats = self.r.hgetall(key)
        total = int(stats.get(b"total", 0))
        empty = int(stats.get(b"empty", 0))
        return {
            "total": total,
            "empty_rate": empty / total if total > 0 else 0,
            "healthy": (empty / total < 0.2) if total > 10 else True
        }

Error Handling

Examples

Basic usage: Apply exa reliability patterns to a standard project setup with default configuration options.

Advanced scenario: Customize exa reliability patterns for production environments with multiple constraints and team-specific requirements.

Resources

• Exa API Reference

Output

• Configuration files or code changes applied to the project
• Validation report confirming correct implementation
• Summary of changes made and their rationale