https://paper.kim/en/posts/ Recent content in Posts on paper.archive https://paper.kim/images/default-thumb.jpg https://paper.kim/images/default-thumb.jpg Hugo en-US Sun, 06 Sep 2026 22:00:00 +0900 https://paper.kim/en/posts/ai/2026-09-06-gpt6-astra-model-comparison/ Sun, 06 Sep 2026 22:00:00 +0900 https://paper.kim/en/posts/ai/2026-09-06-gpt6-astra-model-comparison/ GPT-6 Astra shipped on September 3. Compared against Claude Fable 5.1, Opus 5 and GPT-5.6 Sol: the 2.5x price increase, the token-efficiency twist, the ARC-AGI-3 harness problem, and the row missing from the announcement. https://paper.kim/en/posts/ai/2026-09-01-fable51-model-comparison/ Tue, 01 Sep 2026 21:00:00 +0900 https://paper.kim/en/posts/ai/2026-09-01-fable51-model-comparison/ Claude Fable 5.1 shipped today. Compared against Opus 5, Fable 5 and GPT-5.6 Sol: the 75% cache-read price cut, three breaking changes, and where the vendor table and third-party measurements disagree. https://paper.kim/en/posts/diary/2026-08-16-megi-maeuntang/ Sun, 16 Aug 2026 11:20:00 +0900 https://paper.kim/en/posts/diary/2026-08-16-megi-maeuntang/ Spicy catfish stew at Uiseong Maneul Hwangto Megi in Jakdong, Bucheon. Freshwater shrimp make the broth, and a block of ramyeon noodles goes in as a matter of course. https://paper.kim/en/posts/diary/2026-08-05-yuksashimi-malatang/ Wed, 05 Aug 2026 20:23:00 +0900 https://paper.kim/en/posts/diary/2026-08-05-yuksashimi-malatang/ Dinner was yuksashimi — sliced raw beef eaten with sesame oil, garlic and green chilli — alongside a malatang cooked at home. Good ingredients, not quite enough broth. https://paper.kim/en/posts/diary/2026-07-30-samgyeopsal/ Thu, 30 Jul 2026 13:00:00 +0900 https://paper.kim/en/posts/diary/2026-07-30-samgyeopsal/ Grilling samgyeopsal and beef sirloin at home, starting at lunch. Half the pan is minari. Onion, potato and a pot of stew on the side, and no drinks today. https://paper.kim/en/posts/ai/2026-07-28-llm-wiki/ Tue, 28 Jul 2026 00:00:00 +0900 https://paper.kim/en/posts/ai/2026-07-28-llm-wiki/ A walkthrough of Karpathy's LLM Wiki pattern: the three-layer structure, the ingest/query/lint loop, how people actually use it, and how much of the efficiency claim has actually been measured. https://paper.kim/en/posts/ai/2026-07-25-sf-ai-declaration/ Sat, 25 Jul 2026 09:00:00 +0900 https://paper.kim/en/posts/ai/2026-07-25-sf-ai-declaration/ What the San Francisco AI Declaration of July 24, 2026 actually says, which deals were signed alongside it, and what Korea's AI Framework Act requires from developers today. https://paper.kim/en/posts/ai/2026-07-25-opus5-model-comparison/ Sat, 25 Jul 2026 08:30:00 +0900 https://paper.kim/en/posts/ai/2026-07-25-opus5-model-comparison/ Claude Opus 5 compared with GPT-5.6 Sol, Fable 5 and Sonnet 5 across coding, agentic work, long context and cost, plus what changed from Opus 4.8 and what to watch when migrating. https://paper.kim/en/posts/diary/2026-07-21-joinfolia-paju/ Tue, 21 Jul 2026 12:00:00 +0900 https://paper.kim/en/posts/diary/2026-07-21-joinfolia-paju/ We went to Joinfolia in Paju to look around and came home with a few more plants. The place is much bigger than it looks from outside. https://paper.kim/en/2026/07/20/harness-aws-limited-account/ Mon, 20 Jul 2026 00:00:00 +0000 https://paper.kim/en/2026/07/20/harness-aws-limited-account/ When deploying a SaaS service on AWS and connecting Harness for CI/CD, one of the first questions is how Harness should access the AWS account. https://paper.kim/en/posts/diary/2026-07-19-deungchon-shabu/ Sun, 19 Jul 2026 19:10:00 +0900 https://paper.kim/en/posts/diary/2026-07-19-deungchon-shabu/ Tonight's dinner: Deungchon-style shabu-shabu, delivered — with one hack. The beef came from the supermarket, since a tray of shabu-sliced beef costs… https://paper.kim/en/posts/diary/2026-07-18-yasik-sora-ojingeo/ Sat, 18 Jul 2026 22:47:00 +0900 https://paper.kim/en/posts/diary/2026-07-18-yasik-sora-ojingeo/ Late-night eating is practically a national sport in Korea — it even has its own word, yasik (야식). Tonight's yasik came by delivery app. https://paper.kim/en/posts/diary/2026-07-18-bapsarang-paju/ Sat, 18 Jul 2026 12:44:00 +0900 https://paper.kim/en/posts/diary/2026-07-18-bapsarang-paju/ Lunch at Bapsarang, a countryside diner in Paju (north of Seoul), the kind of place Koreans call a baekban-jip (백반집). https://paper.kim/en/posts/diary/2026-07-17-daebit-sikdang-gaebong/ Fri, 17 Jul 2026 18:37:00 +0900 https://paper.kim/en/posts/diary/2026-07-17-daebit-sikdang-gaebong/ Korean BBQ night at Daebit Sikdang near home. Their thing is kkot-samgyeop (꽃삼겹, 'flower pork belly') grilled on a dome-shaped stone pan. https://paper.kim/en/posts/diary/2026-07-16-home-drink-kahlua/ Thu, 16 Jul 2026 21:00:00 +0900 https://paper.kim/en/posts/diary/2026-07-16-home-drink-kahlua/ Drinking at home tonight — Koreans call it homesul (홈술, home + sul/alcohol). All the food is takeout. The drink: Kahlúa mixed with milk. https://paper.kim/en/posts/diary/2026-07-15-dakjang-beer-gaebong/ Wed, 15 Jul 2026 20:19:00 +0900 https://paper.kim/en/posts/diary/2026-07-15-dakjang-beer-gaebong/ My local pub, Dakjang Maekju in Gaebong-dong — walking distance from home, which in Korea is a blessing. https://paper.kim/en/posts/diary/2026-07-12-geoje-cablecar/ Sun, 12 Jul 2026 15:39:00 +0900 https://paper.kim/en/posts/diary/2026-07-12-geoje-cablecar/ Riding the Geoje Panorama Cable Car up to the 565m Nojasan observatory, and the view over Korea's southern archipelago from the top. https://paper.kim/en/posts/diary/2026-07-12-yoonsikdang-geoje/ Sun, 12 Jul 2026 13:22:00 +0900 https://paper.kim/en/posts/diary/2026-07-12-yoonsikdang-geoje/ Lunch on Geoje Island at a place called Yoonsikdang. We ordered hanchi mulhoe and a rock-octopus rice bowl. https://paper.kim/en/posts/diary/2026-07-12-dongtaetang-geoje/ Sun, 12 Jul 2026 08:20:00 +0900 https://paper.kim/en/posts/diary/2026-07-12-dongtaetang-geoje/ Day two on Geoje Island. Breakfast at the pollack-stew place right in front of our lodging. https://paper.kim/en/posts/diary/2026-07-11-geoje-haegeumgang/ Sat, 11 Jul 2026 14:00:00 +0900 https://paper.kim/en/posts/diary/2026-07-11-geoje-haegeumgang/ Taking the Haegeumgang sightseeing cruise off Geoje Island, where the seagulls follow the boat close enough to take snacks from your hand. https://paper.kim/en/posts/diary/2026-07-11-milmyeon-woomyeonga/ Sat, 11 Jul 2026 12:00:00 +0900 https://paper.kim/en/posts/diary/2026-07-11-milmyeon-woomyeonga/ Found a great noodle place on Geoje Island (south coast of Korea) called Woomyeonga. This one was seriously good. https://paper.kim/en/posts/diary/2026-07-10-gopchang-jeongol/ Fri, 10 Jul 2026 13:30:00 +0900 https://paper.kim/en/posts/diary/2026-07-10-gopchang-jeongol/ Tonight's anju (안주 — food you eat while drinking) is gopchang jeongol, at my regular place Yeokjeon Sundae-guk in Gaebong-dong, Seoul. https://paper.kim/en/posts/diary/2026-07-09-blog-renewal/ Thu, 09 Jul 2026 10:00:00 +0900 https://paper.kim/en/posts/diary/2026-07-09-blog-renewal/ Finally gave this old dev blog a facelift. Tech posts will still be the main thing, but from now on I'll also drop everyday records here — mostly… https://paper.kim/en/posts/mac/2023-04-08-%EC%95%84%EC%B9%B4%EC%9D%B4%EB%B8%8C%EC%9C%A0%ED%8B%B8%EB%A6%AC%ED%8B%B0-%EB%8F%99%EC%9E%91-%EC%95%88%EB%90%98%EB%8A%94-%ED%98%84%EC%83%81/ Sat, 08 Apr 2023 01:05:00 +0000 https://paper.kim/en/posts/mac/2023-04-08-%EC%95%84%EC%B9%B4%EC%9D%B4%EB%B8%8C%EC%9C%A0%ED%8B%B8%EB%A6%AC%ED%8B%B0-%EB%8F%99%EC%9E%91-%EC%95%88%EB%90%98%EB%8A%94-%ED%98%84%EC%83%81/ Ran into this on a MacBook Air M2. Archive Utility wouldn't extract a zip on double-click. https://paper.kim/en/posts/golang/2022-03-28-golang_profiler/ Mon, 28 Mar 2022 16:53:00 +0000 https://paper.kim/en/posts/golang/2022-03-28-golang_profiler/ Using the Go profiler (pprof). Profile via net/http/pprof, CPU profile (collects data for 30 seconds), Heap memory (returns current memory info). https://paper.kim/en/2020/05/13/kubernetes-certmanager/ Wed, 13 May 2020 11:18:00 +0000 https://paper.kim/en/2020/05/13/kubernetes-certmanager/ Installing and configuring cert-manager to serve https through a Kubernetes ingress, with certificate issuance handled automatically. https://paper.kim/en/posts/kube/2020-05-13-kubernetes-glusterfs/ Wed, 13 May 2020 11:18:00 +0000 https://paper.kim/en/posts/kube/2020-05-13-kubernetes-glusterfs/ Setting up GlusterFS on Kubernetes, including patching the gk-deploy script where it still used deprecated kubectl options. https://paper.kim/en/2020/05/13/kubernetes-ingress-urlproxy/ Wed, 13 May 2020 11:18:00 +0000 https://paper.kim/en/2020/05/13/kubernetes-ingress-urlproxy/ kubernetes ingress - proxying to a specific url https://paper.kim/en/posts/centos/2016-08-11-ssh-key-login/ Thu, 11 Aug 2016 16:07:00 +0000 https://paper.kim/en/posts/centos/2016-08-11-ssh-key-login/ Set up an ssh key on macOS so you can log into the server without typing a password Normally I don't do this, for security. https://paper.kim/en/2016/07/27/redis-datatype/ Wed, 27 Jul 2016 14:32:00 +0000 https://paper.kim/en/2016/07/27/redis-datatype/ Strings, Lists, Sets, Hashes, Sorted sets and Bitmaps, plus HyperLogLog, Geo and Streams. Every example run against redis-cli, with notes on which type to reach for https://paper.kim/en/2016/07/14/gradle/ Thu, 14 Jul 2016 14:15:00 +0000 https://paper.kim/en/2016/07/14/gradle/ There's a manual install method.. but I prefer automatic installs like the above doesn't everyone For manual install see the site… https://paper.kim/en/posts/opensource/2016-06-21-fluentd/ Wed, 22 Jun 2016 15:47:00 +0000 https://paper.kim/en/posts/opensource/2016-06-21-fluentd/ I've been collecting error logs with flume, but I'm switching to fluentd. actually the goal is monitoring, not collecting The architecture seems… https://paper.kim/en/2016/06/08/apachelog/ Wed, 08 Jun 2016 15:32:00 +0000 https://paper.kim/en/2016/06/08/apachelog/ There's an api server that handles data traffic from an app I computed the average response time per interface using the apache logs For the hadoop,… https://paper.kim/en/posts/opensource/2016-05-30-spark-hadoop/ Mon, 30 May 2016 16:35:00 +0000 https://paper.kim/en/posts/opensource/2016-05-30-spark-hadoop/ Installing and running Hadoop, then analyzing files with Spark. Done on OSX, written up in order from configuration to execution. https://paper.kim/en/2016/04/08/amazon-ec2-root-pwd/ Fri, 08 Apr 2016 11:33:00 +0000 https://paper.kim/en/2016/04/08/amazon-ec2-root-pwd/ AWS ec2 servers block ssh access with a password by default. Let's edit the file below to allow it. https://paper.kim/en/posts/etc/2016-03-24-git-rebase-merge/ Thu, 24 Mar 2016 16:36:00 +0000 https://paper.kim/en/posts/etc/2016-03-24-git-rebase-merge/ I use git a lot these days and I've always been confused about rebase vs merge. https://paper.kim/en/posts/etc/2016-02-25-git-revert-local-commit/ Thu, 25 Feb 2016 14:35:00 +0000 https://paper.kim/en/posts/etc/2016-02-25-git-revert-local-commit/ Specify the target repository to restore, like below (when the current checkout is develop) If you don't specify a repository, it seems to revert… https://paper.kim/en/posts/python/2016-02-17-python-http-request/ Wed, 17 Feb 2016 11:41:00 +0000 https://paper.kim/en/posts/python/2016-02-17-python-http-request/ I've been studying python lately, so as practice I made a simple program that checks every 10 seconds whether a webserver is dead. https://paper.kim/en/posts/python/2016-02-12-install-python3/ Fri, 12 Feb 2016 16:53:00 +0000 https://paper.kim/en/posts/python/2016-02-12-install-python3/ Installing Python3 on CentOS 6. Command line to install 3.5.1 on centos 6. https://paper.kim/en/posts/etc/2015-12-18-unity-with-visualstudio-code/ Fri, 18 Dec 2015 15:39:00 +0000 https://paper.kim/en/posts/etc/2015-12-18-unity-with-visualstudio-code/ When developing with Unity on Mac you usually code with MonoDevelop. But it doesn't support Korean, which was really annoying. https://paper.kim/en/posts/etc/2015-12-15-mysql-cache-reset/ Tue, 15 Dec 2015 14:55:00 +0000 https://paper.kim/en/posts/etc/2015-12-15-mysql-cache-reset/ When tuning queries, run this first to see uncached results. https://paper.kim/en/posts/spring/2015-11-13-spring-jpa-createnamedquery/ Fri, 13 Nov 2015 17:57:00 +0000 https://paper.kim/en/posts/spring/2015-11-13-spring-jpa-createnamedquery/ As in Test.java, you can execute a NamedQuery defined in orm.xml directly with the EntityManager.. https://paper.kim/en/posts/spring/2015-11-11-spring-redis/ Tue, 10 Nov 2015 17:36:00 +0000 https://paper.kim/en/posts/spring/2015-11-11-spring-redis/ Integrating Redis with Spring using spring-data-redis, from the dependency through configuration and the result. https://paper.kim/en/posts/centos/2015-10-30-flume-logback-sink/ Fri, 30 Oct 2015 18:13:00 +0000 https://paper.kim/en/posts/centos/2015-10-30-flume-logback-sink/ These turned out to be bigger downsides than expected, so I made a simple sink project. https://paper.kim/en/2015/10/30/logback-config/ Fri, 30 Oct 2015 11:18:00 +0000 https://paper.kim/en/2015/10/30/logback-config/ With logback, the file rolls over when the day passes or the size goes over 100MB. https://paper.kim/en/posts/centos/2015-10-29-flume-setting-sample/ Thu, 29 Oct 2015 15:51:00 +0000 https://paper.kim/en/posts/centos/2015-10-29-flume-setting-sample/ Installing Flume and a basic flume.conf sample, from setting JAVA_HOME to configuring sources, channels and sinks. https://paper.kim/en/2015/10/28/spring-sitemesh-setting/ Wed, 28 Oct 2015 17:08:00 +0000 https://paper.kim/en/2015/10/28/spring-sitemesh-setting/ Let's set up sitemesh. There's almost nothing to change in sitemesh.xml (just the decorators.xml file path) Setup is done once you drop in the xml… https://paper.kim/en/2015/10/21/jpa-save/ Wed, 21 Oct 2015 16:20:00 +0000 https://paper.kim/en/2015/10/21/jpa-save/ In jpa you save with the repository.save method Like the class, @OneToMany or @ManyToOne fields can be saved together. https://paper.kim/en/2015/10/15/csharp-lpcstr-parameter-call/ Thu, 15 Oct 2015 12:13:00 +0000 https://paper.kim/en/2015/10/15/csharp-lpcstr-parameter-call/ An example of calling a c++ dll from c#. CallingConvention = CallingConvention.Cdecl and [MarshalAs(UnmanagedType.LPWStr)] are the important parts. https://paper.kim/en/posts/dotnet/2015-10-16-wpf-control-save-to-png/ Thu, 15 Oct 2015 12:13:00 +0000 https://paper.kim/en/posts/dotnet/2015-10-16-wpf-control-save-to-png/ I was going to use System.Drawing like I did before.. turns out wpf already has this built in.. https://paper.kim/en/posts/spring/2015-10-08-spring-jpa-namedquery-namednativequery/ Thu, 08 Oct 2015 01:32:00 +0000 https://paper.kim/en/posts/spring/2015-10-08-spring-jpa-namedquery-namednativequery/ In jpa.. you can query data through a repository with findAll or the findOneBy.... https://paper.kim/en/posts/spring/2015-10-08-spring-jpa/ Wed, 07 Oct 2015 18:04:00 +0000 https://paper.kim/en/posts/spring/2015-10-08-spring-jpa/ Tested entity mapping plus queries.. Query conditions 1. When fetching a Member.. also fetch the member's images... and the list of inters 2. https://paper.kim/en/2015/10/05/spring-jpa-maven/ Mon, 05 Oct 2015 00:41:00 +0000 https://paper.kim/en/2015/10/05/spring-jpa-maven/ I develop with mybatis most of the time.. But JPA is supposedly the trend, so I wired it into a small project. https://paper.kim/en/posts/opensource/2015-09-21-redis-304/ Sun, 20 Sep 2015 21:47:00 +0000 https://paper.kim/en/posts/opensource/2015-09-21-redis-304/ Building and installing Redis 3.0.4 from source, from preparing gcc and the build tools through compiling and running it. https://paper.kim/en/posts/dotnet/2015-09-17-net-framework-452-40/ Wed, 16 Sep 2015 20:21:00 +0000 https://paper.kim/en/posts/dotnet/2015-09-17-net-framework-452-40/ Recently I had to build a Windows app. I heard .NET 4.5 added the new async syntax, so.. might as well, I went with 4.5.2. Oh...... https://paper.kim/en/posts/centos/2015-09-16-centos-67/ Tue, 15 Sep 2015 20:40:00 +0000 https://paper.kim/en/posts/centos/2015-09-16-centos-67/ Set up a server for a simple messaging app I'm building with a friend. Of course I don't really know what I'm doing. Everything comes from Google.. https://paper.kim/en/posts/spring/2015-08-28-spring-batch/ Thu, 27 Aug 2015 22:44:00 +0000 https://paper.kim/en/posts/spring/2015-08-28-spring-batch/ Tried spring-batch recently.. worked out well. Being able to set the transaction commit size and read size separately seems especially nice. https://paper.kim/en/posts/centos/2015-07-02-jfreechart-centos/ Wed, 01 Jul 2015 20:33:00 +0000 https://paper.kim/en/posts/centos/2015-07-02-jfreechart-centos/ I'm using JFreeChart, and when it runs on Tomcat, Korean text renders as broken boxes. Put the font files in /usr/share/fonts and run fc-cache -fv. https://paper.kim/en/posts/mac/2015-06-04-osx-10103-homebrew/ Thu, 04 Jun 2015 01:05:00 +0000 https://paper.kim/en/posts/mac/2015-06-04-osx-10103-homebrew/ Installing homebrew on OSX 10.10.3, from running the install script in the terminal through the initial checks. https://paper.kim/en/2015/04/15/2-hadoop-26x-with-spring-40-mapreduce/ Wed, 15 Apr 2015 00:39:00 +0000 https://paper.kim/en/2015/04/15/2-hadoop-26x-with-spring-40-mapreduce/ hadoop + spring integration test 2 - hadoop 2.6.x with spring 4.0 (MapReduce WordCount example) https://paper.kim/en/2015/04/12/hadoop-26x-with-spring-40/ Sun, 12 Apr 2015 19:46:00 +0000 https://paper.kim/en/2015/04/12/hadoop-26x-with-spring-40/ Using Hadoop 2.6.x with Spring 4.0: installing Hadoop on OSX Yosemite and lining up the pom.xml dependencies. https://paper.kim/en/posts/centos/2015-03-27-403/ Fri, 27 Mar 2015 01:47:00 +0000 https://paper.kim/en/posts/centos/2015-03-27-403/ If you've tried everything and still keep getting 403.. https://paper.kim/en/posts/spring/2015-03-25-spring-junit-testcase/ Tue, 24 Mar 2015 22:42:00 +0000 https://paper.kim/en/posts/spring/2015-03-25-spring-junit-testcase/ Writing JUnit test cases in Spring: adding spring-test to pom.xml and loading the application context in the test. https://paper.kim/en/posts/spring/2015-03-11-spring-rabbitmq/ Tue, 10 Mar 2015 18:55:00 +0000 https://paper.kim/en/posts/spring/2015-03-11-spring-rabbitmq/ Integrating RabbitMQ with Spring, from the rpm install and starting the server through the Spring configuration. https://paper.kim/en/posts/centos/2015-03-05-git/ Wed, 04 Mar 2015 17:33:00 +0000 https://paper.kim/en/posts/centos/2015-03-05-git/ A collection of git commands: migrating from svn, handling ignore files, setting remotes, dealing with tags and branches, reverting local commits, and backup and restore. https://paper.kim/en/posts/centos/2015-02-11-mysql-mariadb-utf8mb4/ Tue, 10 Feb 2015 20:48:00 +0000 https://paper.kim/en/posts/centos/2015-02-11-mysql-mariadb-utf8mb4/ Switching MySQL and MariaDB from utf8 to utf8mb4 so emoji can be stored, covering both the server settings and the actual column type changes. https://paper.kim/en/posts/centos/2015-02-06-blog-post_21/ Thu, 05 Feb 2015 17:42:00 +0000 https://paper.kim/en/posts/centos/2015-02-06-blog-post_21/ A collection of CentOS commands: locating installed programs, deleting old logs, editing hosts and DNS, checking OS bits and version, installing fonts, editing crond, and finding and killing Tomcat processes. https://paper.kim/en/posts/mac/2015-02-06-parallels-8-9-commandspace/ Thu, 05 Feb 2015 17:29:00 +0000 https://paper.kim/en/posts/mac/2015-02-06-parallels-8-9-commandspace/ I've been using the settings below from version 8 through 11. Done. This worked for me. https://paper.kim/en/posts/spring/2015-02-06-spring-map-to-xml-viewresolver/ Thu, 05 Feb 2015 17:16:00 +0000 https://paper.kim/en/posts/spring/2015-02-06-spring-map-to-xml-viewresolver/ A Spring view class I made when I had to return xml instead of the usual json. Only works when the result is a map. Set up the config below... https://paper.kim/en/posts/centos/2015-02-06-tomcat-outofmemory/ Thu, 05 Feb 2015 17:10:00 +0000 https://paper.kim/en/posts/centos/2015-02-06-tomcat-outofmemory/ Fixing frequent Tomcat OutOfMemory errors by setting CATALINA_OPTS at the top of catalina.sh to raise heap and PermGen size.