September 2022
Intermediate to advanced
549 pages
11h 27m
Chinese
Content preview from 基于AWS的数据科学实践
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
218
｜
第
6
章
6.3
通过
SageMaker
特征存储（
Feature Store
）
共享特征
特征工程需要直觉、耐心和试错。由于越来越多的团队在商业场景中利用
AI
和机
器学习，对一个易于发现且重用的中心化特征仓库的需求日渐增长。这种仓库被称
为“特征存储”（
Feature Store
）。
特征存储是存储机器学习特征的数据湖。正如我们在上文演示的用
SageMaker
处理
任务计算
BERT
特征那样，由于特征有时需要繁重的计算，如果可能，我们想要在
整个组织范围内存储并重用这些特征。
为
SageMaker
机器学习工作流而生的特征存储，和为商业智能报表和大屏服务的
Amazon Redshift
数据仓库，二者所需的转换可能不同。例如，我们在特征存储中保
存
BERT
嵌入，而在数据仓库中保存清洗且丰富过的数据，如图
6-14
所示。
应用
转换过的
数据
原始
数据集
特征存储
（AI和ML特征）
数据仓库
（SQL表）
数据湖
交易
点击流
应用数据
图 6-14：特征存储、数据湖和数据仓库的关系
无需自行构建特征存储，我们可以利用
Amazon SageMaker
托管的特征存储。
SageMaker
特征存储可以保存离线和在线特征。离线（
offline
）特征保存在为高吞
吐量、批量获取的工作流（如模型训练）而优化的仓库中。在线（
online
）特征保
存在为低延时实时请求（如模型推理）而优化的仓库中。
由于我们已经花费了一大笔时间生成
BERT
特征，我们想要将这些特征共享给我们
组织中的其他团队。或许这些团队能够从特征中发现我们不曾探索的新的和更优的 ...
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.