Programmer Think

1, What is istio Cloud platforms benefit companies that use them. But it is undeniable that going to the cloud will put pressure on the DevOps team. In order to be portable, developers must use microservices to build applications. At the same time, operation and maintenance personnel are also managing extremely large hybrid cloud and multi ...

brief introduction Pandas provides many powerful functions of merging Series and Dataframe, which can facilitate data analysis. This article will explain in detail how to use pandas to merge Series and Dataframe. Using concat The most commonly used method is DF concat. Let's look at the following: pd.concat(objs, axis=0, join='outer', i ...

Continuous check-in and receive gold coins describe User behavior log table tb_user_log (uid - user ID, artistic_id - article ID, in_time - entry time, out_time - departure time, sign_in - check in or not) Scenario Logic Description: artical_id - article ID represents the ID of the article the user browses. In special cases, it is artistic ...

Introduction to this article The Dragon Boat Festival is coming. How about traveling? Go home? Visit relatives and friends? You have to bring zongzi. Then: What brand of zongzi do you choose?What flavor of zongzi do you choose?What price range to choose? This year, Huang climbed the "zongzi data" on jd.com in Python to analyze it ...

1. Spark SQL architecture design The development of big data is realized by using SQL directly. It supports both DSL and SQL syntax style. At present, in the whole architecture design of spark, all spark modules, such as SQL, SparkML, sparkGrahpx and structured streaming, run on the catalyst optimization & tungsten execution module, The fo ...

1. Introduction to big data 1.1 big data concept big data refers to a data set that cannot be captured, managed and processed by conventional software tools within a certain time range. It is a massive, high growth rate and diversified information asset that requires a new processing mode to have stronger decision-making power, insight an ...

Shared variable broadcast variable Broadcast variables allow programs to cache a read-only variable on each machine in the cluster instead of saving a copy for each task. With broadcast variables, you can share some data in a more efficient way, such as a global configuration file. from pyspark.sql import SparkSession spark = SparkSe ...

catalogue 0. Links to related articles 1. Introduction to broadcaststate 2. Requirements - realize dynamic update of configuration 3. Coding steps 4. Code implementation 0. Links to related articles Flink article summary 1. Introduction to broadcaststate During the development process, if low throughput events such as distribution / b ...

1, Narration (beginning of story) The other day, my sister asked me to go out secretly and asked me to see a movie emmm.... It's nothing. Let's go. Hey, hey ~ Go?? I regretted going there. I found a park and sat watching movies on my mobile phone Feeding mosquitoes, sweating, watching boring movies, the key is that she doesn't let me idle, ...

I think everyone should be the same as Xiaobian. Xiaobian usually spends a few yuan to buy a few notes when he passes by the lottery shop! After all, what if you want to win the prize, right! Then who still works, although it may be equivalent to a house! But it's all money! But often they don't win, or about five yuan! Hahaha, maybe it's no ...