5/16/2023 0 Comments Wenn ich bleibe streamcloud![]() KSQL, ksqlDB and Kafka Streams pursue the same goal: to simplify the process of building stream processing applications. The next article (part 2) in this series will give an overview of the various licensing options. This license restricts the possibility for competitors to provide commercial competing SaaS offering to Confluent Products offerings. It is important to notice that the Confluent Community License does not fulfill all requirements defined by the Open-Source Initiative for open-source projects. Though both technologies are freely available with code accessible on GitHub. The initial project KSQL was renamed ksqlDB after the release of important new functionalities.īoth KSQL and ksqlDB are open-source available projects and technologies licensed under the Confluent Community License. ksqlDB is the evolution of KSQL, a streaming SQL engine designed for Kafka. KsqlDB is an open-source event streaming database purposefully built for stream processing applications on top of Apache Kafka. In this first part, an overview of ksqlDB and its benefits will be presented. It's recommended but not mandatory to read the previous article " Harnessing the Power of Kafka" about Kafka Streams before this one. The goal as with the previous articles is to give an overview of tools, technologies and frameworks provided by Kafka to leverage the development of different stream processing applications ranging from simple stream processing to real-time processing. Some interesting questions this and coming articles will try to answer. ![]() Why is another solution necessary? How is this different from Kafka Streams and other frameworks? Which use cases and issues is it addressing? Why then write another article? Well, brace yourself, good things come in pairs and here comes ksqlDB: another solution within the Kafka ecosystem to build stream processing applications. Streams (Kafka Streams API) rich library was presented as such an alternative to the known producer and consumer. ![]() In a previous article, this question was raised to introduce alternative solutions offered by Kafka for designing and building stream processing applications. Others are disappearing even as you turn to look.Is there more to Kafka than the usual producer and consumer API? There are hidden messages all around you. WIE WIRST DU IN ERINNERUNG BLEIBEN, WENN DU NICHT MEHR BIST? WOHER KOMMT DIESES WASSER? ĭAS WASSER IST VOLLER GEHEIMNISSE. These were some of the messages that appeared at the site: Over time all the messages that I installed at the site will decay and dissolve back into the earth. Our conversations were private, often quite intimate and revealing, shaped by the notion of sharing secrets and influenced by the questions surrounding us. They were led to contemplate what they would leave behind, and how their trace would eventually dissolve back into the earth. Reflecting on the questions, they considered how their lives merged with others and with the natural world around them. The longer the viewers sat on the bench with me, the more they saw. The invitation to exchange secrets enticed the viewers to sit for a moment, and as they relaxed and shifted their attention to their immediate surroundings, they gradually became aware of the words hovering in the air around them. Did it stay with them forever, or was it gone the next day? After reading it to themselves, they ate it. They placed their secret in the box, and then selected someone else’s. Opening a box, I brought out a small piece of edible paper, on which they wrote. They sat with me overlooking the brook, while they thought of a secret. The messages concerned your awareness of the immediate surroundings, as well as your place in the world and the kind of traces that you will leave.Įach day of the exhibition I also sat on the park bench at the site, and engaged people passing to write a secret for me. They were cut into the leaves on the trees and bushes, formed in clay along the edge of the water, released into the stream in floating letters made of ice, and distributed to the viewers in the form of familiar chocolate alphabet biscuits. Some were more visible than others, and each decayed and disappeared at a different rate. Each day I added several messages at the site. The piece unfolded over the course of minutes, hours, and days, extending beyond my two week presence at the site. Remnants of life upstream sometimes flowed by, but what were we not seeing that had already dissolved in the water? The path behind my bench was another kind of river, as people passed by whose histories mingled. My site was a bench in a public park, along a stream which had been ‘renaturized.’ What was now a babbling, meandering brook had formerly been a drainage canal. “Secret Messages” was created in response to the exhibition theme of ecology and art, and the idea of traces left in nature.
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