mirror of
https://github.com/BerriAI/litellm.git
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d59f8f952d
* perf: remove 'always_read_redis' - adding +830ms on each llm call * test: cleanup codestral tests - backend api unavailable
335 lines
12 KiB
Python
335 lines
12 KiB
Python
"""
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Dual Cache implementation - Class to update both Redis and an in-memory cache simultaneously.
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Has 4 primary methods:
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- set_cache
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- get_cache
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- async_set_cache
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- async_get_cache
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"""
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import traceback
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from typing import List, Optional
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import litellm
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from litellm._logging import print_verbose, verbose_logger
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from .base_cache import BaseCache
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from .in_memory_cache import InMemoryCache
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from .redis_cache import RedisCache
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class DualCache(BaseCache):
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"""
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DualCache is a cache implementation that updates both Redis and an in-memory cache simultaneously.
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When data is updated or inserted, it is written to both the in-memory cache + Redis.
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This ensures that even if Redis hasn't been updated yet, the in-memory cache reflects the most recent data.
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"""
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def __init__(
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self,
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in_memory_cache: Optional[InMemoryCache] = None,
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redis_cache: Optional[RedisCache] = None,
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default_in_memory_ttl: Optional[float] = None,
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default_redis_ttl: Optional[float] = None,
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) -> None:
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super().__init__()
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# If in_memory_cache is not provided, use the default InMemoryCache
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self.in_memory_cache = in_memory_cache or InMemoryCache()
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# If redis_cache is not provided, use the default RedisCache
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self.redis_cache = redis_cache
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self.default_in_memory_ttl = (
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default_in_memory_ttl or litellm.default_in_memory_ttl
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)
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self.default_redis_ttl = default_redis_ttl or litellm.default_redis_ttl
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def update_cache_ttl(
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self, default_in_memory_ttl: Optional[float], default_redis_ttl: Optional[float]
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):
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if default_in_memory_ttl is not None:
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self.default_in_memory_ttl = default_in_memory_ttl
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if default_redis_ttl is not None:
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self.default_redis_ttl = default_redis_ttl
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def set_cache(self, key, value, local_only: bool = False, **kwargs):
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# Update both Redis and in-memory cache
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try:
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if self.in_memory_cache is not None:
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if "ttl" not in kwargs and self.default_in_memory_ttl is not None:
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kwargs["ttl"] = self.default_in_memory_ttl
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self.in_memory_cache.set_cache(key, value, **kwargs)
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if self.redis_cache is not None and local_only is False:
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self.redis_cache.set_cache(key, value, **kwargs)
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except Exception as e:
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print_verbose(e)
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def increment_cache(
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self, key, value: int, local_only: bool = False, **kwargs
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) -> int:
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"""
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Key - the key in cache
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Value - int - the value you want to increment by
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Returns - int - the incremented value
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"""
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try:
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result: int = value
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if self.in_memory_cache is not None:
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result = self.in_memory_cache.increment_cache(key, value, **kwargs)
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if self.redis_cache is not None and local_only is False:
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result = self.redis_cache.increment_cache(key, value, **kwargs)
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return result
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except Exception as e:
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verbose_logger.error(f"LiteLLM Cache: Excepton async add_cache: {str(e)}")
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raise e
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def get_cache(self, key, local_only: bool = False, **kwargs):
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# Try to fetch from in-memory cache first
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try:
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result = None
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if self.in_memory_cache is not None:
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in_memory_result = self.in_memory_cache.get_cache(key, **kwargs)
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if in_memory_result is not None:
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result = in_memory_result
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if result is None and self.redis_cache is not None and local_only is False:
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# If not found in in-memory cache, try fetching from Redis
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redis_result = self.redis_cache.get_cache(key, **kwargs)
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if redis_result is not None:
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# Update in-memory cache with the value from Redis
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self.in_memory_cache.set_cache(key, redis_result, **kwargs)
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result = redis_result
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print_verbose(f"get cache: cache result: {result}")
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return result
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except Exception:
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verbose_logger.error(traceback.format_exc())
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def batch_get_cache(self, keys: list, local_only: bool = False, **kwargs):
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try:
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result = [None for _ in range(len(keys))]
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if self.in_memory_cache is not None:
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in_memory_result = self.in_memory_cache.batch_get_cache(keys, **kwargs)
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if in_memory_result is not None:
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result = in_memory_result
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if None in result and self.redis_cache is not None and local_only is False:
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"""
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- for the none values in the result
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- check the redis cache
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"""
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sublist_keys = [
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key for key, value in zip(keys, result) if value is None
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]
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# If not found in in-memory cache, try fetching from Redis
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redis_result = self.redis_cache.batch_get_cache(sublist_keys, **kwargs)
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if redis_result is not None:
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# Update in-memory cache with the value from Redis
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for key in redis_result:
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self.in_memory_cache.set_cache(key, redis_result[key], **kwargs)
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for key, value in redis_result.items():
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result[keys.index(key)] = value
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print_verbose(f"async batch get cache: cache result: {result}")
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return result
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except Exception:
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verbose_logger.error(traceback.format_exc())
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async def async_get_cache(self, key, local_only: bool = False, **kwargs):
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# Try to fetch from in-memory cache first
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try:
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print_verbose(
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f"async get cache: cache key: {key}; local_only: {local_only}"
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)
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result = None
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if self.in_memory_cache is not None:
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in_memory_result = await self.in_memory_cache.async_get_cache(
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key, **kwargs
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)
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print_verbose(f"in_memory_result: {in_memory_result}")
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if in_memory_result is not None:
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result = in_memory_result
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if result is None and self.redis_cache is not None and local_only is False:
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# If not found in in-memory cache, try fetching from Redis
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redis_result = await self.redis_cache.async_get_cache(key, **kwargs)
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if redis_result is not None:
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# Update in-memory cache with the value from Redis
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await self.in_memory_cache.async_set_cache(
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key, redis_result, **kwargs
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)
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result = redis_result
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print_verbose(f"get cache: cache result: {result}")
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return result
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except Exception:
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verbose_logger.error(traceback.format_exc())
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async def async_batch_get_cache(
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self, keys: list, local_only: bool = False, **kwargs
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):
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try:
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result = [None for _ in range(len(keys))]
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if self.in_memory_cache is not None:
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in_memory_result = await self.in_memory_cache.async_batch_get_cache(
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keys, **kwargs
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)
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if in_memory_result is not None:
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result = in_memory_result
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if None in result and self.redis_cache is not None and local_only is False:
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"""
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- for the none values in the result
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- check the redis cache
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"""
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sublist_keys = [
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key for key, value in zip(keys, result) if value is None
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]
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# If not found in in-memory cache, try fetching from Redis
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redis_result = await self.redis_cache.async_batch_get_cache(
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sublist_keys, **kwargs
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)
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if redis_result is not None:
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# Update in-memory cache with the value from Redis
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for key, value in redis_result.items():
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if value is not None:
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await self.in_memory_cache.async_set_cache(
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key, redis_result[key], **kwargs
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)
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for key, value in redis_result.items():
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index = keys.index(key)
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result[index] = value
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return result
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except Exception:
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verbose_logger.error(traceback.format_exc())
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async def async_set_cache(self, key, value, local_only: bool = False, **kwargs):
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print_verbose(
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f"async set cache: cache key: {key}; local_only: {local_only}; value: {value}"
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)
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try:
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if self.in_memory_cache is not None:
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await self.in_memory_cache.async_set_cache(key, value, **kwargs)
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if self.redis_cache is not None and local_only is False:
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await self.redis_cache.async_set_cache(key, value, **kwargs)
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except Exception as e:
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verbose_logger.exception(
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f"LiteLLM Cache: Excepton async add_cache: {str(e)}"
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)
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async def async_batch_set_cache(
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self, cache_list: list, local_only: bool = False, **kwargs
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):
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"""
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Batch write values to the cache
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"""
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print_verbose(
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f"async batch set cache: cache keys: {cache_list}; local_only: {local_only}"
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)
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try:
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if self.in_memory_cache is not None:
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await self.in_memory_cache.async_set_cache_pipeline(
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cache_list=cache_list, **kwargs
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)
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if self.redis_cache is not None and local_only is False:
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await self.redis_cache.async_set_cache_pipeline(
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cache_list=cache_list, ttl=kwargs.pop("ttl", None), **kwargs
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)
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except Exception as e:
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verbose_logger.exception(
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f"LiteLLM Cache: Excepton async add_cache: {str(e)}"
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)
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async def async_increment_cache(
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self, key, value: float, local_only: bool = False, **kwargs
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) -> float:
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"""
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Key - the key in cache
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Value - float - the value you want to increment by
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Returns - float - the incremented value
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"""
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try:
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result: float = value
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if self.in_memory_cache is not None:
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result = await self.in_memory_cache.async_increment(
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key, value, **kwargs
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)
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if self.redis_cache is not None and local_only is False:
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result = await self.redis_cache.async_increment(key, value, **kwargs)
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return result
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except Exception as e:
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raise e # don't log if exception is raised
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async def async_set_cache_sadd(
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self, key, value: List, local_only: bool = False, **kwargs
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) -> None:
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"""
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Add value to a set
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Key - the key in cache
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Value - str - the value you want to add to the set
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Returns - None
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"""
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try:
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if self.in_memory_cache is not None:
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_ = await self.in_memory_cache.async_set_cache_sadd(
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key, value, ttl=kwargs.get("ttl", None)
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)
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if self.redis_cache is not None and local_only is False:
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_ = await self.redis_cache.async_set_cache_sadd(
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key, value, ttl=kwargs.get("ttl", None) ** kwargs
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)
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return None
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except Exception as e:
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raise e # don't log, if exception is raised
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def flush_cache(self):
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if self.in_memory_cache is not None:
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self.in_memory_cache.flush_cache()
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if self.redis_cache is not None:
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self.redis_cache.flush_cache()
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def delete_cache(self, key):
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"""
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Delete a key from the cache
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"""
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if self.in_memory_cache is not None:
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self.in_memory_cache.delete_cache(key)
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if self.redis_cache is not None:
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self.redis_cache.delete_cache(key)
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async def async_delete_cache(self, key: str):
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"""
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Delete a key from the cache
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"""
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if self.in_memory_cache is not None:
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self.in_memory_cache.delete_cache(key)
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if self.redis_cache is not None:
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await self.redis_cache.async_delete_cache(key)
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