{"id":94,"date":"2018-05-12T12:39:24","date_gmt":"2018-05-12T12:39:24","guid":{"rendered":"https:\/\/alexgurkin.com\/blog\/ttl-time-to-live-in-my-web-development-experience\/"},"modified":"2023-10-18T21:44:06","modified_gmt":"2023-10-19T02:44:06","slug":"ttl-time-to-live-in-my-web-development-experience","status":"publish","type":"post","link":"https:\/\/alexgurkin.com\/blog\/ttl-time-to-live-in-my-web-development-experience\/","title":{"rendered":"TTL (Time to Live) in my web development experience"},"content":{"rendered":"\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"512\" src=\"https:\/\/alexgurkin.com\/blog\/wp-content\/uploads\/2023\/10\/1__48-1024x512.jpg\" alt=\"\" class=\"wp-image-201\" srcset=\"https:\/\/alexgurkin.com\/blog\/wp-content\/uploads\/2023\/10\/1__48-1024x512.jpg 1024w, https:\/\/alexgurkin.com\/blog\/wp-content\/uploads\/2023\/10\/1__48-300x150.jpg 300w, https:\/\/alexgurkin.com\/blog\/wp-content\/uploads\/2023\/10\/1__48-768x384.jpg 768w, https:\/\/alexgurkin.com\/blog\/wp-content\/uploads\/2023\/10\/1__48.jpg 1536w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-1 is-layout-flex wp-block-gallery-is-layout-flex\"><\/figure>\n\n\n\n<p>In web development, the term TTL (Time to Live) refers to the duration for<br>which data should be considered valid or accessible. It is a fundamental concept<br>that plays a crucial role in various aspects of web development, including DNS<br>(Domain Name System), caching, and data synchronization.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">DNS and TTL<\/h2>\n\n\n\n<p>DNS is a system that translates human-readable domain names (e.g., www.example.com)<br>into IP addresses (e.g., 192.168.0.1) that are used by computers to communicate<br>with each other over the internet. TTL is an important parameter in DNS records<br>that determines how long DNS resolvers should cache the resolved IP address.<\/p>\n\n\n\n<p>When a DNS resolver receives a DNS record, it stores it in its cache along with<br>the TTL value provided by the authoritative DNS server. The resolver will refer<br>to this cache for subsequent requests until the TTL expires. Once the TTL expires,<br>the resolver will request a fresh copy of the DNS record from the authoritative DNS server.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Caching and TTL<\/h2>\n\n\n\n<p>Caching is a technique used to store copies of frequently accessed content in<br>temporary storage. It helps improve the performance and scalability of web applications.<br>TTL is an essential aspect of caching as it determines how long the cached content<br>should be considered valid.<\/p>\n\n\n\n<p>When a web browser or proxy server receives a response from a web server, it checks<br>the TTL value specified in the response headers. If the TTL is non-zero, the browser<br>or proxy server will store the response in its cache and serve it for subsequent<br>requests until the TTL expires. Once the TTL expires, the browser or proxy server<br>will send a new request to the web server for fresh content.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Data Synchronization and TTL<\/h2>\n\n\n\n<p>In distributed systems and databases, data synchronization involves keeping multiple<br>copies of the same data consistent across different nodes or replicas. TTL can be<br>used to manage the duration for which data changes should propagate or be considered valid.<\/p>\n\n\n\n<p>When data is updated on one node, it is important to propagate the changes to other<br>nodes within a reasonable time frame. TTL can control the expiration time of the<br>data changes, ensuring that outdated data is not propagated indefinitely. Once the<br>TTL expires, the data changes can be considered stale and further updates can take place.<\/p>\n\n\n\n<p>TTL (Time to Live) is an important concept in web development. It plays a significant<br>role in DNS, caching, and data synchronization. Understanding and appropriately<br>configuring TTL values can have a significant impact on the performance, reliability,<br>and consistency of web applications.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In web development, the term TTL (Time to Live) refers to the duration forwhich data should be considered valid or accessible. It is a fundamental<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[],"yst_prominent_words":[],"class_list":["post-94","post","type-post","status-publish","format-standard","hentry","category-experience"],"_links":{"self":[{"href":"https:\/\/alexgurkin.com\/blog\/wp-json\/wp\/v2\/posts\/94"}],"collection":[{"href":"https:\/\/alexgurkin.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/alexgurkin.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/alexgurkin.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/alexgurkin.com\/blog\/wp-json\/wp\/v2\/comments?post=94"}],"version-history":[{"count":3,"href":"https:\/\/alexgurkin.com\/blog\/wp-json\/wp\/v2\/posts\/94\/revisions"}],"predecessor-version":[{"id":223,"href":"https:\/\/alexgurkin.com\/blog\/wp-json\/wp\/v2\/posts\/94\/revisions\/223"}],"wp:attachment":[{"href":"https:\/\/alexgurkin.com\/blog\/wp-json\/wp\/v2\/media?parent=94"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/alexgurkin.com\/blog\/wp-json\/wp\/v2\/categories?post=94"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/alexgurkin.com\/blog\/wp-json\/wp\/v2\/tags?post=94"},{"taxonomy":"yst_prominent_words","embeddable":true,"href":"https:\/\/alexgurkin.com\/blog\/wp-json\/wp\/v2\/yst_prominent_words?post=94"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}