{"id":2472,"date":"2026-04-17T10:57:34","date_gmt":"2026-04-17T08:57:34","guid":{"rendered":"https:\/\/www.ludovicocaldara.net\/dba\/?p=2472"},"modified":"2026-04-17T11:00:53","modified_gmt":"2026-04-17T09:00:53","slug":"dg26ai-validate-fsfo","status":"publish","type":"post","link":"https:\/\/www.ludovicocaldara.net\/dba\/dg26ai-validate-fsfo\/","title":{"rendered":"Data Guard 26ai &#8211; #28: Fast-Start Failover Validation"},"content":{"rendered":"<p><a href=\"https:\/\/www.ludovicocaldara.net\/dba\/dg-26ai-series\/\">This post is part of a blog series.<\/a><\/p>\n<p data-start=\"149\" data-end=\"330\">Oracle Data Guard 26ai introduces a new validation command for <a href=\"https:\/\/docs.oracle.com\/en\/database\/oracle\/oracle-database\/26\/dgbkr\/fast-start-failover2.html\">Fast-Start Failover (FSFO)<\/a>.<\/p>\n<p data-start=\"149\" data-end=\"330\"><a href=\"https:\/\/docs.oracle.com\/en\/database\/oracle\/oracle-database\/26\/dgbkr\/validate-fast_start-failover.html\">VALIDATE FAST_START FAILOVER<\/a><\/p>\n<p data-start=\"149\" data-end=\"330\">It provides a quick, comprehensive check of FSFO readiness across the configuration.<\/p>\n<p data-start=\"332\" data-end=\"428\">The command consolidates multiple internal checks and provides results in four areas.<\/p>\n<h2 data-section-id=\"ve5kcg\" data-start=\"430\" data-end=\"462\"><span role=\"text\">1. FSFO Readiness Checks<\/span><\/h2>\n<p data-start=\"464\" data-end=\"522\">Identifies conditions that directly affect FSFO operation:<\/p>\n<ul data-start=\"523\" data-end=\"842\">\n<li data-section-id=\"1a5dcvj\" data-start=\"523\" data-end=\"572\">FSFO state (enabled, observe-only, suspended)<\/li>\n<li data-section-id=\"1gm0oh8\" data-start=\"573\" data-end=\"644\">Transport synchronization for synchronous and asynchronous standbys<\/li>\n<li data-section-id=\"1lzk4cp\" data-start=\"645\" data-end=\"695\">Observer status and connectivity to the target<\/li>\n<li data-section-id=\"12yv1l1\" data-start=\"696\" data-end=\"769\">Ongoing role transitions, reinstatements, and active observer changes<\/li>\n<\/ul>\n<h2 data-section-id=\"1qqtbpp\" data-start=\"844\" data-end=\"880\"><span role=\"text\">2. Post-Failover Consistency<\/span><\/h2>\n<p data-start=\"882\" data-end=\"951\">Validates that the configuration remains consistent after a failover:<\/p>\n<ul data-start=\"952\" data-end=\"1120\">\n<li data-section-id=\"1y7nf4u\" data-start=\"952\" data-end=\"1010\">Flashback enabled on the primary and designated target<\/li>\n<li data-section-id=\"15hip43\" data-start=\"1011\" data-end=\"1120\">All potential future primaries define a valid <a href=\"https:\/\/docs.oracle.com\/en\/database\/oracle\/oracle-database\/26\/dgbkr\/faststartfailovertarget.html\"><code data-start=\"1059\" data-end=\"1084\">FastStartFailoverTarget<\/code><\/a>, including cascaded configurations<\/li>\n<\/ul>\n<h2 data-section-id=\"nav5iy\" data-start=\"1122\" data-end=\"1162\"><span role=\"text\">3. Configuration Risk Indicators<\/span><\/h2>\n<p data-start=\"1164\" data-end=\"1221\">Highlights parameter combinations that require attention:<\/p>\n<ul data-start=\"1222\" data-end=\"1352\">\n<li data-section-id=\"1kydfxs\" data-start=\"1222\" data-end=\"1269\">FSFO threshold relative to RAC requirements<\/li>\n<li data-section-id=\"5fwe66\" data-start=\"1270\" data-end=\"1352\">Alignment between <a href=\"https:\/\/docs.oracle.com\/en\/database\/oracle\/oracle-database\/26\/dgbkr\/faststartfailoverlaglimit.html\"><code data-start=\"1290\" data-end=\"1317\">FastStartFailoverLagLimit<\/code><\/a> and <a href=\"https:\/\/docs.oracle.com\/en\/database\/oracle\/oracle-database\/26\/dgbkr\/faststartfailoverthreshold.html\"><code data-start=\"1322\" data-end=\"1350\">FastStartFailoverThreshold<\/code><\/a><\/li>\n<\/ul>\n<h2 data-section-id=\"1ucs8rf\" data-start=\"1354\" data-end=\"1383\"><span role=\"text\">4. Callout Validation<\/span><\/h2>\n<p data-start=\"1385\" data-end=\"1432\">Inspects automation hooks associated with FSFO:<\/p>\n<ul data-start=\"1433\" data-end=\"1533\">\n<li data-section-id=\"14ska6s\" data-start=\"1433\" data-end=\"1481\">Parses <a href=\"https:\/\/docs.oracle.com\/en\/database\/oracle\/oracle-database\/26\/dgbkr\/fast-start-failover2.html#GUID-E42D1412-E117-45C3-979D-38C11A7DBCD2\"><code data-start=\"1442\" data-end=\"1459\">fsfocallout.ora<\/code> <\/a>and related scripts and reports invalid entries<\/li>\n<\/ul>\n<h2 data-section-id=\"481gj2\" data-start=\"1535\" data-end=\"1559\"><a href=\"https:\/\/www.ludovicocaldara.net\/dba\/wp-content\/uploads\/2026\/04\/dg26ai-validate-fsfo-scaled.png\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large wp-image-2473\" src=\"https:\/\/www.ludovicocaldara.net\/dba\/wp-content\/uploads\/2026\/04\/dg26ai-validate-fsfo-1024x524.png\" alt=\"The execution of the VALIDATE FAST_START FAILOVER command reports some example errors.\" width=\"584\" height=\"299\" srcset=\"https:\/\/www.ludovicocaldara.net\/dba\/wp-content\/uploads\/2026\/04\/dg26ai-validate-fsfo-1024x524.png 1024w, https:\/\/www.ludovicocaldara.net\/dba\/wp-content\/uploads\/2026\/04\/dg26ai-validate-fsfo-300x154.png 300w, https:\/\/www.ludovicocaldara.net\/dba\/wp-content\/uploads\/2026\/04\/dg26ai-validate-fsfo-768x393.png 768w, https:\/\/www.ludovicocaldara.net\/dba\/wp-content\/uploads\/2026\/04\/dg26ai-validate-fsfo-1536x787.png 1536w, https:\/\/www.ludovicocaldara.net\/dba\/wp-content\/uploads\/2026\/04\/dg26ai-validate-fsfo-2048x1049.png 2048w, https:\/\/www.ludovicocaldara.net\/dba\/wp-content\/uploads\/2026\/04\/dg26ai-validate-fsfo-500x256.png 500w\" sizes=\"auto, (max-width: 584px) 100vw, 584px\" \/><\/a><\/h2>\n<p data-start=\"1561\" data-end=\"1728\">This command centralizes FSFO validation into a single operation.<br data-start=\"1626\" data-end=\"1629\" \/>It makes configuration state explicit, surfaces anomalies, and simplifies operational checks.<\/p>\n<p data-start=\"1730\" data-end=\"1872\">The result is a more predictable and verifiable FSFO setup, enabling automated and observable Data Guard environments.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>FSFO validation in Oracle Data Guard 26ai: a single command to verify readiness, consistency, risk settings, and callout scripts across your configuration. <a href=\"https:\/\/www.ludovicocaldara.net\/dba\/dg26ai-validate-fsfo\/\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":2473,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[375,329],"tags":[],"class_list":["post-2472","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-oracle-ai-database-26ai","category-oracle-dg"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.ludovicocaldara.net\/dba\/wp-json\/wp\/v2\/posts\/2472","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ludovicocaldara.net\/dba\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ludovicocaldara.net\/dba\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ludovicocaldara.net\/dba\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ludovicocaldara.net\/dba\/wp-json\/wp\/v2\/comments?post=2472"}],"version-history":[{"count":2,"href":"https:\/\/www.ludovicocaldara.net\/dba\/wp-json\/wp\/v2\/posts\/2472\/revisions"}],"predecessor-version":[{"id":2475,"href":"https:\/\/www.ludovicocaldara.net\/dba\/wp-json\/wp\/v2\/posts\/2472\/revisions\/2475"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.ludovicocaldara.net\/dba\/wp-json\/wp\/v2\/media\/2473"}],"wp:attachment":[{"href":"https:\/\/www.ludovicocaldara.net\/dba\/wp-json\/wp\/v2\/media?parent=2472"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ludovicocaldara.net\/dba\/wp-json\/wp\/v2\/categories?post=2472"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ludovicocaldara.net\/dba\/wp-json\/wp\/v2\/tags?post=2472"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}