内容简介:HSEis an embeddable key-value store designed for SSDs based on NAND flash or persistent memory. HSE optimizes performance and endurance by orchestrating data placement across DRAM and multiple classes of SSDs or other solid-state storage.HSE is ideal for p
HSE: Heterogeneous-Memory Storage Engine
HSEis an embeddable key-value store designed for SSDs based on NAND flash or persistent memory. HSE optimizes performance and endurance by orchestrating data placement across DRAM and multiple classes of SSDs or other solid-state storage.
HSE is ideal for powering NoSQL, Software-Defined Storage (SDS), High-Performance Computing (HPC), Big Data, Internet of Things (IoT), and Artificial Intelligence (AI) solutions.
Key Features
- Standard and advanced key-value operators
- Full transactions with snapshot-isolation spanning multiple independent key-value collections
- Cursors for iterating over snapshot views
- Data model for optimizing mixed use-case workloads in a single data store
- Flexible durability controls
- Configurable data orchestration schemes
- C API library that can be embedded in any application
Benefits
- Scales to terabytes of data and hundreds of billions of keys per store
- Efficiently handles thousands of concurrent operations
- Dramatically improves throughput, latency, write-amplification, and read-amplification versus common alternatives for many workloads
- Optionally combines multiple classes of solid-state storage to optimize performance and endurance
Getting Started
The HSE Wiki contains all the information you need to get started with HSE.
YCSB Performance Results
YCSB (Yahoo!® Cloud Serving Benchmark) is an industry-standard benchmark for databases and storage engines supporting key-value workloads. The following table summarizes several YCSB workload mixes, with application examples taken from the YCSB documentation.
YCSB Workload | Operations | Application Example |
---|---|---|
A | 50% Read; 50% Update | Session store recording user-session activity |
B | 95% Read; 5% Update | Photo tagging |
C | 100% Read | User profile cache |
D | 95% Read; 5% Insert | User status updates |
We integrated HSE with YCSB to make it easy to compare its performance and scalability to that of other storage engines for YCSB workloads. Below are throughput results from running YCSB with HSE.
For comparison, we include results from RocksDB , a popular and widely-deployed key-value store. For these YCSB workloads, HSE delivered up to nearly 6x more throughput than RocksDB.
System configuration details and additional performance results can be found in the YCSB section of the HSE Wiki.
We also integrated HSE with MongoDB® , a popular NoSQL database, to validate its benefits within a real-world storage application. Below are throughput results from running YCSB with MongoDB using HSE (MongoDB/HSE).
For comparison, we include results from MongoDB using the default WiredTiger storage engine (MongoDB/WiredTiger). For these YCSB workloads, MongoDB/HSE delivered up to nearly 8x more throughput than MongoDB/WiredTiger.
System configuration details and additional performance results can be found in the MongoDB section of the HSE Wiki.
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计算机网络(第6版)
[美] James F.Kurose、[美] Keith W.Ross / 陈鸣 / 机械工业出版社 / 2014-10 / 79.00元
《计算机网络:自顶向下方法(原书第6版)》第1版于12年前出版,首创采用自顶向下的方法讲解计算机网络的原理和协议,出版以来已被几百所大学和学院选用,是业界最经典的计算机网络教材之一。 《计算机网络:自顶向下方法(原书第6版)》第6版继续保持了以前版本的特色,为计算机网络教学提供了一种新颖和与时俱进的方法,同时也进行了相当多的修订和更新:第1章更多地关注时下,更新了接入网的论述;第2章用pyt......一起来看看 《计算机网络(第6版)》 这本书的介绍吧!