{"id":35149,"date":"2022-03-01T10:50:16","date_gmt":"2022-03-01T15:50:16","guid":{"rendered":"https:\/\/mjtsai.com\/blog\/?p=35149"},"modified":"2022-03-01T10:50:16","modified_gmt":"2022-03-01T15:50:16","slug":"speeding-up-an-initial-local-time-machine-backup","status":"publish","type":"post","link":"https:\/\/mjtsai.com\/blog\/2022\/03\/01\/speeding-up-an-initial-local-time-machine-backup\/","title":{"rendered":"Speeding Up an Initial Local Time Machine Backup"},"content":{"rendered":"<p><a href=\"https:\/\/eclecticlight.co\/2022\/02\/28\/does-removing-i-o-throttling-make-backups-faster\/\">Howard Oakley<\/a>:<\/p>\n<blockquote cite=\"https:\/\/eclecticlight.co\/2022\/02\/28\/does-removing-i-o-throttling-make-backups-faster\/\">\n<p>To assess the effect of IOPOL_THROTTLE policy, standardised TMA backups were run with and without the policy in force, on an M1 Pro MBP backing up to an external USB-C\/SATA SSD under macOS 12.2.1.<\/p>\n<p>[&#8230;]<\/p>\n<p>However, transfer rates during the backup itself showed that turning the policy off resulted in a huge increase in transfer rates[&#8230;]<\/p>\n<p>[&#8230;]<\/p>\n<p>The big disadvantage of using kernel states to completely disable IOPOL_THROTTLE policy is that this can only be applied globally, which includes I\/O for Spotlight indexing, and file synchronisation and other background tasks. While it could be used to great effect to accelerate a large first full backup, leaving the policy disabled in normal circumstances could readily lead to adverse side-effects, in which indexing threads swamp important user storage access.<\/p>\n<\/blockquote>\n\n<p>Previously:<\/p>\n<ul>\n<li><a href=\"https:\/\/mjtsai.com\/blog\/2022\/01\/10\/has-time-machine-slowed-for-small-files\/\">Has Time Machine Slowed for Small Files?<\/a><\/li>\n<li><a href=\"https:\/\/mjtsai.com\/blog\/2016\/03\/16\/massively-speed-up-time-machine-backups\/\">Massively Speed Up Time Machine Backups<\/a><\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>Howard Oakley: To assess the effect of IOPOL_THROTTLE policy, standardised TMA backups were run with and without the policy in force, on an M1 Pro MBP backing up to an external USB-C\/SATA SSD under macOS 12.2.1. [&#8230;] However, transfer rates during the backup itself showed that turning the policy off resulted in a huge increase [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"apple_news_api_created_at":"2022-03-01T15:50:18Z","apple_news_api_id":"7eaab69b-37ad-4439-bb69-a1592a1cc5e5","apple_news_api_modified_at":"2022-03-01T15:50:19Z","apple_news_api_revision":"AAAAAAAAAAD\/\/\/\/\/\/\/\/\/\/w==","apple_news_api_share_url":"https:\/\/apple.news\/Afqq2mzetRDm7aaFZKhzF5Q","apple_news_coverimage":0,"apple_news_coverimage_caption":"","apple_news_is_hidden":false,"apple_news_is_paid":false,"apple_news_is_preview":false,"apple_news_is_sponsored":false,"apple_news_maturity_rating":"","apple_news_metadata":"\"\"","apple_news_pullquote":"","apple_news_pullquote_position":"","apple_news_slug":"","apple_news_sections":"\"\"","apple_news_suppress_video_url":false,"apple_news_use_image_component":false,"footnotes":""},"categories":[2],"tags":[1494,146,30,2077,216],"class_list":["post-35149","post","type-post","status-publish","format-standard","hentry","category-technology","tag-app-tamer","tag-backup","tag-mac","tag-macos-12","tag-timemachine"],"apple_news_notices":[],"_links":{"self":[{"href":"https:\/\/mjtsai.com\/blog\/wp-json\/wp\/v2\/posts\/35149","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mjtsai.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mjtsai.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mjtsai.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mjtsai.com\/blog\/wp-json\/wp\/v2\/comments?post=35149"}],"version-history":[{"count":1,"href":"https:\/\/mjtsai.com\/blog\/wp-json\/wp\/v2\/posts\/35149\/revisions"}],"predecessor-version":[{"id":35150,"href":"https:\/\/mjtsai.com\/blog\/wp-json\/wp\/v2\/posts\/35149\/revisions\/35150"}],"wp:attachment":[{"href":"https:\/\/mjtsai.com\/blog\/wp-json\/wp\/v2\/media?parent=35149"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mjtsai.com\/blog\/wp-json\/wp\/v2\/categories?post=35149"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mjtsai.com\/blog\/wp-json\/wp\/v2\/tags?post=35149"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}