1. Service RPC port NameNode uses port 8020 by default to listen to all RPC requests (HDP version), including client data requests, DataNode heartbeat and block reporting, ZKFC module monitoring an
Category: Architecture
Architectural design is the product of people’s subjective mapping of elements within a structure and the relationships between elements. Architecture design is a series of related abstract patterns used to guide the design of various aspects of large software systems. The architect’s job responsibility is to transform the customer’s needs into a standardized development plan and text during the development of a software project, and to formulate the overall structure of the project, and guide the entire development team to complete the plan. Architecture design is the early stage of the software design process, which connects the requirements analysis and the design process. The main task of an architect is not to write specific software programs, but to engage in higher-level development and architecture work. He must have a good understanding of development technology, and he needs to have good organizational and management skills.
Full-text search idea MongoDB & node.js
I am developing a search engine for my website, and I want to add the following functions to it;
>Full text search
>What do you mean Is it a function?
> Data storage in MongoDB
I want
Performance – How many nginx redirects too much?
I am working on a news center website that has existed for many years, and is steadily increasing page redirects. Currently we have about 375 redirects, an increase of about 5-10 per month. < p>
WCF and NetNameDPiPipeBinding are poor performance
I am using a WCF service with netNamedPipeBinding to transfer large amounts of data (a long list of objects) to the client (on the same machine of course).
The problem is the whole The call takes
PowerShell: Retrieve the JSON object by variable value
$json = ConvertFrom-Json “{key:true}”
$key = “key”
Write-Host $json[$key] I want it to be printed, but it is not the case. I know that $json.key will work. Can it be done?
$json = ConvertFro
Sybase – Index Property Precautions
I have a table in SYBASE, which has about 1 billion rows. There is currently no index created for this table, I want to create one now. My question is p> >Before creating an index, what precauti
Real-time search engine Elasticsearch learning
实时搜索引擎Elasticsearch(1)——基础概念、安装和运行
实时搜索引擎Elasticsearch(2)——Rest API的使用
实时搜索引擎Elasticsearch(3) ——查询API的使用
实时搜索引擎Elasticsearch(4)——Aggregations (聚合)API的使用
实时搜索引擎Elasticsearch(5)——Java API的使用
Performance – Idata.frame: Why is wrong “Is.Data.frame (DF) is not TRUE”?
I use a large data frame called exp( file here) in R. In order to improve performance, I suggest that I view the idata.frame() function from plyr. But I think I’m wrong
My original phone is s
Performance – Reflection rendering in IE8
I encountered a problem with React webapp in IE8. In the latest versions of Chrome and FF, the performance is very good. But, don’t you know, the client is running IE8 and the application is runnin
Performance test case
One: Load test-calculate the maximum concurrency In the process of performance testing, we should first design test scenarios to simulate the real business situation, and then pin Design test scr