SEARCH KEYWORD -- Correlated query
How Google Utilizes Big Data for SERP
Google is an expert when it comes to big data. This is evident in their development of various techniques and open source tools which are used by the big data industry professionals. These tools and technique allow Google to sift through millions of different websites and enormous amounts of data in order to provide users with correct answers in a matter of milliseconds. But how does Google accomplish that with such precision? To answer that, we need to focus on the complex activities that go o...
Check if query string variable exists ASP.NET C#/VB
One of the problems I encountered when I started programming ASP.NET websites was to do with the Request.QueryString function. The first projects I was worked on were built with VB.NET and I used the following code to check the existence of a query string variable:VB.NET Codeview plaincopy to clipboardprint?If Request.QueryString("[VARIABLE]") <> Nothing Then 'CODE HERE End If This code check...
ASP.NET,Query string,Request,Empty,NULL,Check 2011-11-05 15:29:50
A simple tutorial on GoLang connecting to Clickhouse
Go, also known as Golang, is a statically-typed, concurrent programming language created by Google. ClickHouse is a high-performance, column-oriented database management system that can be used for real-time data analysis. This tutorial will provide a deep dive into how to connect to ClickHouse from a Go program, including how to perform common database operations such as SELECT and INSERT statements. Before proceeding, it is assumed that you already have Go and ClickHouse installed on your mach...
GOLANG,CLICKHOUSE,TUTORIAL 2023-02-11 07:05:36
Build your own internet search engine - Part 2
After having started to build my own internet search engine as described in a previous blog post, I now have read some papers and books about web search engine architecture and information retrieval to complete my hobby project. Here is a list of papers and books that I highly recommend to anybody who is interested in this topic: 1. Google: data structures and algorithms by Petteri Huuhka 2. The Anatomy of a Large-Scale Hypertextual Web Search Engine by the Google founde...
Search engine,Paper,Database,Data structure 2011-12-22 08:25:59
Hey kids, just say NO to programming !
Cory Doctorow's latest talk 'The Coming War on General Purpose Computing' really puts things in perspective about life in the 21st century. This got me thinking more about functional programming languages and how they are related to the intentional limitation/crippling of turing machines by industry and government. What if Stallman is right about the intentional efforts to limit freedom of information ? What if it's even worse than we all think it is ? In relation to functional languages ...
Programming,Factor,View,Kids,No 2012-01-16 10:16:19
Why I love everything you hate about Java
If you’re one of those hipster programmers who loves Clojure, Ruby, Scala, Erlang, or whatever, you probably deeply loathe Java and all of its giant configuration files and bloated APIs of AbstractFactoryFactoryInterfaces. I used to hate all that stuff too. But you know what? After working for all these months on these huge pieces of Twitter infrastructure I’ve started to love the AbstractFactoryFactories. Let me explain why. Consider this little Scala program. It uses â€Å...
Java,Comparison,Modularity,API 2011-11-29 08:48:15
OpenLDAP Proxy -- rwm-map vs map
OpenLDAP proxy is used to proxy ldap request and response between clients and servers, different servers may have different representations/attributes to mean the same thing. For example, in one LDAP server, the firstName may be represented by firstName, it may be represented by givenName in a different server. However, from the client perspective, it only wants to get the firstName, it doesn't care about the backend attributes. In this case, attribute mapping can help provide a virtual view of ...
MAP,OPENLDAP,OPENLDAP PROXY,LDAP,RWM-MAP 2018-02-02 20:36:02
OpenLDAP Proxy -- slapd.conf
In the introductory post of OpenLDAP proxy, we mentioned that slapd.conf is the configuration file which tells the slapd service what to do. Apart from this, there is a dynamic way of configuring slapd where the configurations are stored in LDIF database. In the future, LDIF database will be the one for configuring slapd, the old style of slapd.conf is deprecated. The slapd.conf can be converted to LDIF style using the slapdtest command. slapdtest -f /etc/ldap/slapd.conf -F /etc...
OPENLDAP,OPENLDAP PROXY,SLAPD,SLAPD.CONF 2017-10-29 04:01:39
Inline IF and CASE statements in MySQL
There are times where running IF statements inside a query can be useful. MySQL provides a simple way to do this through the use of IF and CASE statements. The IF statement takes three arguments; the conditional, the true value and the false value. False and true values may be static values or column values. For example: SELECT IF(score > 100, 100, score) AS score FROM exam_results this will return the value in the score column limited to a maximum value of 100. IF statements can a...
5 Ways to Boost MySQL Scalability
There are a lot of scalability challenges we see with clients over and over. The list could easily include 20, 50 or even 100 items, but we shortened it down to the biggest five issues we see.1. Tune those queriesBy far the biggest bang for your buck is query optimization. Queries can be functionally correct and meet business requirements without being stress tested for high traffic and high load. This is why we often see clients with growing pains, and scalability challenges as their site becom...
MySQL,Scalability,Methods,Implementation,Practice 2011-10-18 02:57:27
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