{"id":78944,"date":"2026-11-10T19:45:10","date_gmt":"2026-11-10T19:45:10","guid":{"rendered":"http:\/\/bangla.sitestree.com\/?p=78944"},"modified":"2026-11-10T19:55:57","modified_gmt":"2026-11-10T19:55:57","slug":"rewritten-sql-server-69260","status":"publish","type":"post","link":"http:\/\/bangla.sitestree.com\/?p=78944","title":{"rendered":"Scaling SQL Server Out: Replicas, Replication, Log Shipping, and Availability"},"content":{"rendered":"<p>Scaling out means distributing work across multiple server resources rather than relying only on a larger machine. SQL Server offers several technologies, each with different goals and consistency properties.<\/p>\n<h2>Availability versus read capacity<\/h2>\n<p>Failover clustering and availability groups can support recovery from failures; readable secondaries, replication, and separate reporting systems may help distribute reads. They are not interchangeable and are not substitutes for backups.<\/p>\n<h2>Common architectures<\/h2>\n<p>Log shipping copies and restores transaction-log backups on a schedule and is useful for certain disaster-recovery designs. Transactional replication distributes changes to subscribers. Always On availability groups offer a separate high-availability approach with optional readable secondary replicas in supported configurations.<\/p>\n<h2>Historical features<\/h2>\n<p>Database mirroring and shared scalable database concepts occur in older tutorials and are not a sensible default for a new deployment. Confirm support, deprecation, edition, and licence requirements before selecting an architecture.<\/p>\n<h2>Design checklist<\/h2>\n<p>Define RPO, RTO, read\/write ratio, transaction consistency needs, failover handling, network latency, and operational responsibilities. Load-test an actual application rather than assuming that adding a node doubles throughput.<\/p>\n<hr\/>\n<p><strong>AI disclosure and reuse:<\/strong> This AI-generated article is rewritten from <a href=\"https:\/\/bangla.sitestree.com\/?p=69260\">an existing Open Education post (ID 69260)<\/a>. Additional explanations, code examples, and version notes may have been added. You may reuse the newly generated article text with or without attribution. Third-party trademarks and linked works retain their own rights. <strong>AI can make mistakes.<\/strong> Check examples, permissions, supported SQL Server versions, and documentation before use in any live system.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Scaling out means distributing work across multiple server resources rather than relying only on a larger machine. SQL Server offers several technologies, each with different goals and consistency properties.<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":true,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_hide_featured_image":false,"_jetpack_featured_image_duplicate_dismissed":0,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[20,182],"tags":[466],"class_list":["post-78944","post","type-post","status-publish","format-standard","hentry","category-information-technology","category---blog","tag-sql-server","item-wrap"],"jetpack_sharing_enabled":true,"jetpack-related-posts":[{"id":69260,"url":"http:\/\/bangla.sitestree.com\/?p=69260","url_meta":{"origin":78944,"position":0},"title":"Scaling Out #38","author":"Author-Check- Article-or-Video","date":"August 16, 2021","format":false,"excerpt":"Methods SQL Server instances Clustering Database mirroring Log shipping Replication Shared scalable databases SQL Server instancesIn the same computer install multiple instance of SQL Server to take advantage of multiple processors. Each instance may use separate processor with separate lock manager, worker threads, tempdb system database. ClusteringFailover Clustering can provide\u2026","rel":"","context":"In &quot;FromSitesTree.com&quot;","block_context":{"text":"FromSitesTree.com","link":"http:\/\/bangla.sitestree.com\/?cat=1917"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":78940,"url":"http:\/\/bangla.sitestree.com\/?p=78940","url_meta":{"origin":78944,"position":1},"title":"SQL Server Backups and Recovery Models: What to Protect and How to Restore","author":"Sayed","date":"November 10, 2026","format":false,"excerpt":"A backup strategy protects against accidental deletion, corruption, ransomware, operator error, and physical failures. Replication, clustering, and RAID do not remove the need for independent, tested backups.","rel":"","context":"In &quot;Information Technology&quot;","block_context":{"text":"Information Technology","link":"http:\/\/bangla.sitestree.com\/?cat=20"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":78938,"url":"http:\/\/bangla.sitestree.com\/?p=78938","url_meta":{"origin":78944,"position":2},"title":"SQL Server Quick Reference: Optimization, Scaling, DMVs, and Backups","author":"Sayed","date":"November 10, 2026","format":false,"excerpt":"SQL Server performance and reliability are related but distinct concerns. A healthy instance needs efficient statements, realistic capacity planning, observability, and a tested restoration process.","rel":"","context":"In &quot;Information Technology&quot;","block_context":{"text":"Information Technology","link":"http:\/\/bangla.sitestree.com\/?cat=20"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":78937,"url":"http:\/\/bangla.sitestree.com\/?p=78937","url_meta":{"origin":78944,"position":3},"title":"SQL Server Administration Study Notes: Performance, Cursors, Indexes, and Recovery","author":"Sayed","date":"November 10, 2026","format":false,"excerpt":"This study guide brings together major SQL Server administration concepts: measuring performance, using indexes, diagnosing slow queries, avoiding inefficient cursors, planning scalability, and protecting recoverability.","rel":"","context":"In &quot;Information Technology&quot;","block_context":{"text":"Information Technology","link":"http:\/\/bangla.sitestree.com\/?cat=20"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":69268,"url":"http:\/\/bangla.sitestree.com\/?p=69268","url_meta":{"origin":78944,"position":4},"title":"SQL Server : Backups #38","author":"Author-Check- Article-or-Video","date":"August 16, 2021","format":false,"excerpt":"Why are backups needed? To protect accidental data loss. Still, if you use highly available and fault-tolerant systems like SAN, and RAID, you may need to backup your database regularly. These fault tolerant systems can not provide accidental data delete by users, accidental data corruption from software and hardware failure.\u2026","rel":"","context":"In &quot;FromSitesTree.com&quot;","block_context":{"text":"FromSitesTree.com","link":"http:\/\/bangla.sitestree.com\/?cat=1917"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":69262,"url":"http:\/\/bangla.sitestree.com\/?p=69262","url_meta":{"origin":78944,"position":5},"title":"Dynamic Management Views #38","author":"Author-Check- Article-or-Video","date":"August 16, 2021","format":false,"excerpt":"Dynamic Management Views provide ways to analyze database performance and to find the cause behind bad-performing SQL server databases\/instances. Bad performance can be due to: poor design, insufficient memory, poorly configured system, disk bottlenecks, poorly written queries and many othersPreviously Windows System Monitor(perfmon.exe) and SQL server profiler were used to\u2026","rel":"","context":"In &quot;FromSitesTree.com&quot;","block_context":{"text":"FromSitesTree.com","link":"http:\/\/bangla.sitestree.com\/?cat=1917"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]}],"jetpack_featured_media_url":"","_links":{"self":[{"href":"http:\/\/bangla.sitestree.com\/index.php?rest_route=\/wp\/v2\/posts\/78944","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/bangla.sitestree.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/bangla.sitestree.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/bangla.sitestree.com\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"http:\/\/bangla.sitestree.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=78944"}],"version-history":[{"count":1,"href":"http:\/\/bangla.sitestree.com\/index.php?rest_route=\/wp\/v2\/posts\/78944\/revisions"}],"predecessor-version":[{"id":79006,"href":"http:\/\/bangla.sitestree.com\/index.php?rest_route=\/wp\/v2\/posts\/78944\/revisions\/79006"}],"wp:attachment":[{"href":"http:\/\/bangla.sitestree.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=78944"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/bangla.sitestree.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=78944"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/bangla.sitestree.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=78944"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}