投稿時間:2023-07-01 20:08:13 RSSフィード2023-07-01 20:00 分まとめ(9件)

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AWS	lambdaタグが付けられた新着投稿 - Qiita	API GatewayにLamba Authorizerを組み込む	https://qiita.com/kennyQiita/items/b5d4549cb61899d52091	apigateway	2023-07-01 19:18:58
python	Pythonタグが付けられた新着投稿 - Qiita	Flaskで動的なWebアプリを作成	https://qiita.com/wooooo/items/77a50edd4620891894b4	flask	2023-07-01 19:36:16
python	Pythonタグが付けられた新着投稿 - Qiita	温度を表す理想のカラーマップを求めて（matplotlib, GrADS）	https://qiita.com/nokos/items/6551b3d3b46be73496cf	matplotlibgrads	2023-07-01 19:23:32
AWS	AWSタグが付けられた新着投稿 - Qiita	API GatewayにLamba Authorizerを組み込む	https://qiita.com/kennyQiita/items/b5d4549cb61899d52091	apigateway	2023-07-01 19:18:58
Ruby	Railsタグが付けられた新着投稿 - Qiita	Railsチュートリアル　１章　エラーまとめ	https://qiita.com/mofu_eng1neer/items/4d5167997e792457eea5	codespace	2023-07-01 19:43:13
海外TECH	DEV Community	Exploring the Limitations of Postgres Partitioning: Lessons Learned and Best Practices	https://dev.to/nightbird07/exploring-the-limitations-of-postgres-partitioning-lessons-learned-and-best-practices-5cj9	Exploring the Limitations of Postgres Partitioning Lessons Learned and Best PracticesPostgres partitioning is a popular technique for horizontally slicing large tables into multiple partitions offering improved query performance and data management However it s crucial to understand the limitations and potential pitfalls associated with this approach to avoid performance degradation application retries and failures In this post we ll delve into the experiences of implementing Postgres partitioning the challenges faced and recommended best practices to mitigate these issues Understanding the Limitations Performance Degradation Partitioning can lead to a spike in lock manager waits and negatively impact user query performance An increase in the number of smaller tables along with multiple indexes and partitions can generate a significant number of locks per query causing contention problems Challenges Faced Backend Struggles The implementation of partitioning can strain the backend system particularly when each partition has numerous indexes The creation of new backend processes for each connection and conflicts arising from lock acquisitions can overwhelm the database leading to performance issues Identifying Key Issues Lock Manager Weight The lock manager becomes burdened with managing the large number of logs created during the partitioning process resulting in expensive operations and contention problems This can severely impact query performance and overall system stability Best Practices and Solutions Fast Path Locking Be cautious when dealing with a large number of partitions as fast path locking which relies on an in memory data structure has a limited number of locks and can lead to contention issues Consider using fewer larger partitions to alleviate contention and ensure smooth operation especially in long transactions Dropping Indexes and Detaching Partitions Dropping indexes can cause locking contention while detaching partitions can acquire access exclusive locks blocking other operations Upgrade to Postgres version or later which introduces the detach concurrently feature to address these issues Postgres Version Upgrade Upgrading to version offers improved handling of locks by placing soft locks on specific partitions being queried It provides a solution for complex locking scenarios enhancing overall performance and management of partitioned tables Conclusion While Postgres partitioning offers benefits in terms of data management and query optimization it is crucial to be aware of its limitations and potential challenges By understanding the intricacies of lock management fast path locking and leveraging the advancements in newer Postgres versions developers can implement partitioning effectively and ensure smooth system operation you can watch a whole video HERE it is highly recommended and even further you can read from this article HERE	2023-07-01 10:51:52
海外TECH	DEV Community	RFID Access Control: What Is It & How Does It Work?	https://dev.to/poxorfidautomation/rfid-access-control-what-is-it-how-does-it-work-3n2p	RFID Access Control What Is It amp How Does It Work RFID access control is a cutting edge technology that revolutionizes the way organizations manage access to their premises This advanced system replaces traditional key based methods with contactless authentication using RFID tags RFID access control consists of key components including RFID tags readers access control panels and management software When a user presents their RFID tag to a reader it emits radio waves that power the tag and enables it to transmit its unique identifier The reader captures this identifier and sends it to the access control panel for verification Based on the validation results access is either granted or denied RFID access control offers enhanced security convenience and flexibility making it an ideal solution for efficient access management in various settings What is RFID Access Control RFID access control is a sophisticated security system that utilizes Radio Frequency Identification RFID technology to regulate and monitor access to physical spaces By replacing traditional keys with RFID tags or cards this system offers a contactless and convenient way for individuals to gain entry When authorized users approach an access point they simply present their RFID tag or card to the reader The reader emits radio waves that power the tag allowing it to transmit a unique identifier back to the reader This identifier is then validated by the access control system which grants or denies access based on predefined permissions The Components of RFID Access Control RFID Tags These small electronic devices consist of an integrated circuit and an antenna Tags are typically attached to access cards or key fobs and emit a unique identifier when in proximity to an RFID reader RFID Readers These devices capture and interpret the data transmitted by RFID tags They are installed at entry points and are responsible for validating access requests Access Control Panel This centralized control unit manages the communication between the RFID readers and the access control system It processes access requests and grants or denies access based on predefined rules and user permissions Management Software This software allows administrators to configure and manage access control parameters define access policies and track access events and logs How does an RFID access control system work Enrollment Users are provided with RFID tags or access cards that are uniquely associated with their identities These tags are encoded with their access privileges and personal information Authentication Process When a user approaches an access point they present their RFID tag to the RFID reader The reader emits radio waves that power the tag enabling it to transmit its unique identifier back to the reader Data Verification The RFID reader captures the tag s identifier and sends it to the access control panel for verification The panel compares the identifier against the authorized user database to determine if access should be granted Access Granting or Denial Based on the verification results the access control panel sends a signal to either unlock the door or deny access The user is granted entry if their tag is valid and they have appropriate access permissions Audit and Monitoring The access control system logs access events maintaining a record of who accessed which area and at what time This information can be reviewed for security purposes auditing or investigating incidents Benefits of RFID access control systems Enhanced Security RFID access control systems provide a higher level of security reducing the risk of unauthorized access and potential security breaches Convenient and Contactless Access RFID tags allow for quick and hands free access eliminating the need for physical keys or manual entry Flexibility and Scalability RFID systems are flexible and easily scalable allowing for easy addition or removal of users and access permissions as organizational needs evolve Efficient Access Management RFID systems streamline access management processes enabling easy assignment modification or revocation of access privileges Audit Trails and Reporting RFID access control systems maintain detailed logs of access events providing a comprehensive audit trail for compliance incident investigation and analysis Integration Capabilities RFID systems can integrate with other business systems optimizing data sharing and automating processes for improved efficiency Increased Accountability RFID tags associate access events with specific individuals promoting accountability and facilitating the identification of responsible parties Cost Savings RFID systems can lead to long term cost savings by eliminating expenses related to physical keys lock replacements and administrative tasks POXO RFID access control provides enhanced security streamlined access management and detailed audit trails making it a valuable solution for organizations seeking efficient and secure access control measures	2023-07-01 10:21:56
ニュース	BBC News - Home	Jeremy Clarkson's Meghan article was sexist to duchess, press regulator rules	https://www.bbc.co.uk/news/entertainment-arts-64489083?at_medium=RSS&at_campaign=KARANGA	clarkson	2023-07-01 10:08:11
ニュース	Newsweek	さすがの美貌とスタイル...女優アンバー・ハードが、美脚「チラ見せ」ファッションで華麗なる復活を演出	https://www.newsweekjapan.jp/stories/culture/2023/07/post-102067.php	前日にはカジュアルな姿で輝きを放つその前日には、映画祭の会場で友人や『IntheFire』の出演者、スタッフと笑顔で話をするハードの姿をカメラが捉えている。	2023-07-01 19:23:00