Tair

Tairopen in new window是由阿里巴巴云开发的云原生内存数据库服务。它提供丰富的数据模型和企业级功能，支持您的实时在线场景，并保持与开源Redis的完全兼容。 Tair还引入了基于新型非易失性内存（NVM）存储介质的持久内存优化实例。

本笔记本展示了与Tair向量数据库相关的功能。

要运行此笔记本，您应该拥有正在运行的Tair实例。

from langchain.embeddings.fake import FakeEmbeddings
from langchain.text_splitter import CharacterTextSplitter
from langchain.vectorstores import Tair

from langchain.document_loaders import TextLoader
loader = TextLoader('../../../state_of_the_union.txt')
documents = loader.load()
text_splitter = CharacterTextSplitter(chunk_size=1000, chunk_overlap=0)
docs = text_splitter.split_documents(documents)

embeddings = FakeEmbeddings(size=128)

Connect to Tair using the TAIR_URL environment variable

export TAIR_URL="redis://{username}:{password}@{tair_address}:{tair_port}"

or the keyword argument tair_url.

Then store documents and embeddings into Tair.

tair_url = "redis://localhost:6379"

# drop first if index already exists
Tair.drop_index(tair_url=tair_url)

vector_store = Tair.from_documents(
    docs,
    embeddings,
    tair_url=tair_url
)

Query similar documents.

query = "What did the president say about Ketanji Brown Jackson"
docs = vector_store.similarity_search(query)
docs[0]

Document(page_content='We’re going after the criminals who stole billions in relief money meant for small businesses and millions of Americans.  \n\nAnd tonight, I’m announcing that the Justice Department will name a chief prosecutor for pandemic fraud. \n\nBy the end of this year, the deficit will be down to less than half what it was before I took office.  \n\nThe only president ever to cut the deficit by more than one trillion dollars in a single year. \n\nLowering your costs also means demanding more competition. \n\nI’m a capitalist, but capitalism without competition isn’t capitalism. \n\nIt’s exploitation—and it drives up prices. \n\nWhen corporations don’t have to compete, their profits go up, your prices go up, and small businesses and family farmers and ranchers go under. \n\nWe see it happening with ocean carriers moving goods in and out of America. \n\nDuring the pandemic, these foreign-owned companies raised prices by as much as 1,000% and made record profits.', metadata={'source': '../../../state_of_the_union.txt'})

# Tair

Tair