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Hyperledger Fabric CouchDB as the state database--use CouchDB

Tags: Understanding application Range font URI name user execution time preventUsing COUCHDB as the state database State database Options The state database includes LEVELDB and COUCHDB. LEVELDB is the default key/value state database embedded in the peer process, andCouchdb is an optional external state database. as with the LEVELDB key/value store, COUCHDB can

How to operate CouchDB in python and couchdb in python

How to operate CouchDB in python and couchdb in python This article briefly describes how to operate CouchDB in python and shares it with you for your reference. The specific method is as follows: 1. Install the python couchDb Library: Https://pypi.python.org/pypi/CouchDB/0.

CouchDB 0.11.0 Release-Download

HTTP protocol operations couchdb.   CouchDB uses Erlang development (Erlang is known as the King of Parallel Computing), and its lowest-level data structure is two types of b+tree,couchdb consisting mainly of two parts, one is "storage" (storeage) and the other is "View Index" ( View Indexs). "Save" is used to store files, and the view index is used for query pr

Couchdb 0.11.0 release-Download

consists of two parts: "Storage" and "view indexs )."Storage" is used to store files, and "view indexes" are used for query and processing.   Couchdb It can adapt to a wide range of application scenarios. In some occasionally connected network applications, we can use couchdb to store data and then synchronize it. It can also be used as a large-scale distribution in the

Enable COUCHDB as state database (block chain database) in Hyperledger fabric

Looking back at my previous blog, in Fabric 1.0, we have 3 types of data storage, one is based on the filesystem block chain data, which is very much like the bitcoin, bitcoin is stored in the form of files. The block chain in Fabric1.0 stores the transaction order read and write sets. and read-write collection is exactly what it reads. Write what. In fact, our state Database, also known as the world, stores the business data we operate in Chaincode in a key-value pair. There is also the databas

Enable COUCHDB as state Database in Hyperledger Fabric

Looking back at one of my previous blogs, in Fabric 1.0, we have 3 types of data stores, one based on the file system Blockchain data, which is like Bitcoin, and bitcoin is also stored in file form. The blockchain in Fabric1.0 stores the transaction order read-write set. What exactly is read and write set? Write what? In fact, our state Database, also known as the World State, stores the business data we operate in Chaincode in the form of key-value pairs. There is also a database of historical

Knowledge about couchdb

ArticleDirectory Advantages: Technical Overview: Data format: Cache: Update mechanism (how to maintain data consistency ): Distributed: Stability: Python client: What does couchdb do (whether it can or cannot ): Prospects: References Couchdb is a database that has been sought after by geek in the past two years. The author was a lotus developer. Unlike tradition

Introduction to couchdb

Introduction Couchdb is a database that has been sought after by geek in the past two years. The author was a lotus developer. Unlike traditional relational databases, it claims to be a document database. The so-called document database does not mean that it can only store text because it is actually a schemal-less concept. All those who have used relational databases know that each field defined in the data table is defined as a Type: int, Char, date

Hyperledger fabric Enable COUCHDB for the state database

Tags: iat bulk query Bulk function name UNC app get handle funcHyperledger Fabric enables COUCHDB as a state database I. Overview Data Request Flow The super ledger uses an endorsement/consensus model, where simulation execution and block validation are performed separately in the nodes of different roles. Simulation execution is concurrent, which can improve scalability and throughput: Endorsement node: Analog execution chai

CouchDB founder joined Salesforce.com to engage in a very "cool" infrastructure

This article is from my article translated on InfoQ Chinese site. The original Article address is www. infoq. comcnnews201401couchdb-creator-joins-salesforce recently, the founder of NoSQL database CouchDB announced that it will join Salesforce.com, engaged in a very cool project related to the vendor's cloud infrastructure. DamienKatz at Bo This article is from my article on InfoQ Chinese site translation,

Infoq interview with couchdb founder

1: we are here at rubyfringe with Damien Katz. How about you introduce yourself? I am the creator and Project Leader of couchdb. I currently work for IBM. Before that I worked for MySQL and before that I worked at IBM again on a project called Lotus Notes. 2: So what's this couchdb thing that we see on your T-shirt? so what is couchdb?

Couchdb without nosql

Couchdb, as part of the nosql trend, is easy to compare with the database labeled with buzzwords. Key-value stores, tuple stores, bigtable clones, document store, graph database, and other labels are attached to each category. These classification labels sometimes help programmers outline the technical properties of the latter segment, but in many cases, the programmer's preference may be wrong and biased. We can say that these new technologies all w

MongoDB and couchdb in full contrast

Http://blog.nosqlfan.com/html/1519.htmlThis article is in the official MongoDB website, MongoDB and CouchDB very similar, they are document-type storage, data storage format is JSON type, all use JavaScript to operate, all support map/reduce. But in fact, there are many essential differences between the two, this article through the phenomenon to pursue the essence, so that you better understand MongoDB and couchd

Nosql> couchdb> technical overview (technical overview)

Based on version 1.2 Document Storage If the table is the storage unit of SQL Server, the documents are the storage unit of couchdb. Each document has a unique ID. Developers can add, query, modify, and delete documents based on the restful http api provided by couchdb. Columns in the SQL Server table, that is, fields, including int, String, text, Boolean, and Other types. The document fields in

MongoDB and Couchdb All-round comparison (turn)

Tags: blog http io ar os using SP for JavaSource: http://www.csdn.net/article/2011-03-21/294226This article is in the official MongoDB website, MongoDB and couchdb very similar, they are document-type storage, data storage format is JSON type, all use JavaScript to operate, all support map/reduce. But in fact, there are many essential differences between the two, this article through the phenomenon to pursue the essence, so that you better understand

CentOS Installation Couchdb

1. The system has installed GCC, make, libtool and other tools 2, yum installation of ICU, Libcul Yum install libicu-devel-y yum install curl-devl-y 3, compile and install Erlang, SpiderMonkey JS Engine, CouchDB Installing Erlang You need to configure the Java compilation environment before installing Erlang, and other FOP (FAKEFOP), wxwidgets hints do not exist to ignore. It is recommended that you compile with Javac Setting the environment varia

CouchDB Unauthorized Access Vulnerability

0x00 COUCHDB InstallationCOUCHDB Official website: http://couchdb.apache.org/Next until the installation is complete, open the browser and visit the following link: http://127.0.0.1:5984/You can use the following URLs to interact with the COUCHDB Web interface: http://127.0.0.1:5984/_utils0x01 Exploit Exploits1, add Query_server configuration, write the command to execute; curl-x PUT ' Http://username:[emai

Document Database System couchdb

Couchdb is a document-oriented database system developed using Erlang. It has just released version 0.10. Couchdb is not a traditional relational database, but a document-oriented database. Its data storage method is similar to Lucene's inde file format, the biggest significance of couchdb is that it is a new generation of storage system for Web applications. In

Apache Open Source Project--couchdb

Apache CouchDB is a document-oriented database management system. It provides a REST interface with JSON as a data format to manipulate it and can manipulate the organization and rendering of documents through views. CouchDB is the top open source project of the Apache Foundation.COUCHDB implementation to the bottom of the data structure is two types of b+tree.Unlike today's popular relational database serv

Couchdb may not be very comfortable to use.

Label:Recently I spent one weeks studying NoSQL, I have a 4 million record MySQL speed is slow, ready to migrate to NoSQL, because the main is some JSON format of the document, originally serialized in MySQL, because of the look of Erlang, known as the very ox x platform, Pick in the COUCHDB, but import 400,000 effective test data, in the local run time, found that the speed is particularly slow (the local machine is 2011 years of imac, equipped with

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