philipz

sudo nano /etc/default/grub

add this line to your grub file:

GRUB_RECORDFAIL_TIMEOUT=0

sudo update-grub

Done!

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./mvnw package -Pnative -Dquarkus.native.container-runtime=docker -Dquarkus.native.builder-image=quay.io/quarkus/ubi-quarkus-native-image:19.3.1-java8

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        {
            "type": "java",
            "name": "backend",
            "request": "attach",
            "hostName": "localhost",
            "port": 5005
        },

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Apache Ignite architecture model

Embedded with the application

Server in separate JVM (real cluster topology)

Client and Server in separate JVM on single host

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# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements.  See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License.  You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software

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https://github.com/btraceio/btrace

https://github.com/alibaba/arthas

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sudo usermod -a -G microk8s <username>
sudo microk8s.kubectl config view --raw > $HOME/.kube/config
microk8s.enable metallb

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gravity regions

convert 1502QR42495.jpg -gravity NorthEast -region 12%x12% -fill white -colorize 100% 1502QR42495_fill.jpg

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A. Consumer > Partitions

consumer.properties

group.id=group1

1. ./kafka-topics.sh --create --zookeeper zookeeper:2181 --replication-factor 1 --partitions 1 --topic test
2. ./kafka-console-producer.sh --broker-list kafka:9092 --topic test
3. ./kafka-console-consumer.sh --bootstrap-server kafka:9092 --topic test --consumer.config ./consumer.properties
4. ./kafka-console-consumer.sh --bootstrap-server kafka:9092 --topic test --consumer.config ./consumer.properties

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1. 管理型系統，如營運類系統，首選關聯式。
2. 大流量系統，如電商單品頁的某個服務，後台選關聯式，前台選內存式。
3. 日誌型系統，原始數據選列式，日誌搜尋選倒排索引。
4. 搜尋型系統，指站內搜尋，非通用搜尋，如商品搜尋，後台選關聯式，前台選倒排索引。
5. 交易型系統，如庫存、交易、記帳，選關聯式+快取+一致性協議，或新型關聯式資料庫。
6. 離線運算，如大量數據分析，首選列式，關聯式亦可。
7. 即時運算，如即時監控，可以選時序資料庫，或列式資料庫。