{"id":55130,"date":"2023-10-04T16:47:09","date_gmt":"2023-10-04T16:47:09","guid":{"rendered":"https:\/\/dbtut.com\/?p=55130"},"modified":"2023-10-04T16:52:14","modified_gmt":"2023-10-04T16:52:14","slug":"oracle-exadata-2","status":"publish","type":"post","link":"https:\/\/dbtut.com\/index.php\/2023\/10\/04\/oracle-exadata-2\/","title":{"rendered":"Oracle Exadata 2"},"content":{"rendered":"<p>In today&#8217;s article, I will be explaining Oracle Exadata 2, which is a continuation of my previous article.<\/p>\n<h3>Active Storage \u2013 Cell Offload<\/h3>\n<p>Oracle Exadata has a data transfer technology called Storage on Node or Cell Offload Processing on Cell.<\/p>\n<p>This technology means that existing processes run on Storage.<\/p>\n<p>Other products on the market perform less than this technology because they process data through the server.<\/p>\n<p>In addition, Oracle Exadata runs many workloads over Cell to achieve higher performance compared to other database servers.<\/p>\n<p>In this way, other All-Flash disks cannot reach Exadata performance.<\/p>\n<p>This feature, which is turned on by default, is regulated by the CELL_OFFLOAD_PROCESSING parameter.<\/p>\n<p>Some features of Cell Offload technology are as follows.<\/p>\n<p>SQL Offload<br \/>\nXML &amp; JSON Upload<br \/>\nRMAN Backup (BCT) Filtering<br \/>\nData file vs. REDO I\/O Segregation<br \/>\nEncryption\/Decryption Offload<br \/>\nFast Data File Creation<\/p>\n<h3>Massively Parallel Processing (MPP)<\/h3>\n<p>MPP technology is a technology designed to enable multiple processors or multiple servers to serve the same purpose.<\/p>\n<p>When you use the shared memory feature on Exadata, all resources can be mobilized for workloads.<\/p>\n<p><img decoding=\"async\" class=\"aligncenter\" src=\"https:\/\/www.cozumpark.com\/wp-content\/uploads\/2020\/02\/image023.gif\" \/><\/p>\n<p>MPP technology can grow horizontally, there is no loss due to the Shared everything structure.<\/p>\n<p>It provides an advantage because a single database concept is used compared to the shared nothing structure.<\/p>\n<h3>Bloom Filters<\/h3>\n<p>Exadata uses Bloom filters that facilitate JOIN operations on Storage rather than processing them directly.<\/p>\n<p>Filter metrics are passed to the Exadata Storage layer to filter the data.<\/p>\n<p>While the last step of the process is done on the RAC, the main workload takes place on the Cell according to the Bloom Filtering architecture.<\/p>\n<p><img decoding=\"async\" class=\"aligncenter\" src=\"https:\/\/www.cozumpark.com\/wp-content\/uploads\/2020\/02\/AsnPV.png\" \/><\/p>\n<h3 id=\"ZIISlWK\">Fast Node &amp; Cell Death Detection<\/h3>\n<p>A typical Cluster structure uses standard architecture over Ethernet.<\/p>\n<p>Although this is supported on all platforms and provides high performance, it has some disadvantages.<\/p>\n<p>Since its first versions, Exadata has relied on Maximum Availability Architecture (MMA) to prevent waiting in the Cluster and to eliminate errors between Nodes.<\/p>\n<p><img decoding=\"async\" class=\"aligncenter\" src=\"https:\/\/www.cozumpark.com\/wp-content\/uploads\/2020\/02\/oracle-database-12c-with-real-application-clusters-rac-high-availability-ha-best-practices-6-638.jpg\" \/><\/p>\n<p><img decoding=\"async\" class=\"aligncenter\" src=\"https:\/\/www.cozumpark.com\/wp-content\/uploads\/2020\/02\/screen-shot-2018-02-09-at-12-56-35-pm.png\" \/><\/p>\n<p>The chart above shows the waiting time for a node breaking on RAC.<\/p>\n<p>While this determination takes 30 seconds or less according to MMA technology, it can go up to 120 seconds in classical systems other than exadata.<\/p>\n<p>As we mentioned above, Exadata is an integrated solution.<\/p>\n<p>It uses Infiniband speed to identify nodes falling on the RAC.<\/p>\n<p>An example chart is given below.<\/p>\n<p><img decoding=\"async\" class=\"aligncenter\" src=\"https:\/\/www.cozumpark.com\/wp-content\/uploads\/2020\/02\/screen-shot-2018-02-09-at-1-07-51-pm.png\" \/><\/p>\n<h3>Large Write Caching &amp; TEMP Performance<\/h3>\n<p>Exadata takes full advantage of this technology by storing data over 128kb on Flash Cache.<\/p>\n<p>This architecture has always run parallel to the capacity produced.<\/p>\n<p>In this way, the Flash Cache size increases equally with each new Exadata machine.<\/p>\n<h3>Adaptive SQL Optimization<\/h3>\n<p>Although this is not specific to the Exadata machine, it is of critical importance for Exadata.<\/p>\n<p>Optimization of SQL statements is extremely important today, when most of the DWH environments are moved to Exadata.<\/p>\n<p>Exadata SQL always optimizes the work plan with maximum efficiency.<\/p>\n<p>If a change in plan is detected, it has the ability to quickly adjust it.<\/p>\n<p><img decoding=\"async\" class=\"aligncenter\" src=\"https:\/\/www.cozumpark.com\/wp-content\/uploads\/2020\/02\/tgsql_vm_069.png\" \/><\/p>\n<h3>Optimizing storage use and I\/O through compression<\/h3>\n<p>Oracle Exadata offers a unique compression technology called Hybrid Columd.<\/p>\n<p>With HCC technology, large amounts of capacity are saved in large databases.<\/p>\n<p>This technology is an innovative approach to data compression.<\/p>\n<p><img decoding=\"async\" class=\"aligncenter\" src=\"https:\/\/www.cozumpark.com\/wp-content\/uploads\/2020\/02\/hcc.jpg\" \/><\/p>\n<h3>Mission Critical HA<\/h3>\n<p>It is designed to be fully compatible with Oracle Exadata high availability architecture.<\/p>\n<p>It is designed to be redundant against all kinds of malfunctions, human errors and interruptions.<\/p>\n<p>In addition, by being integrated into the Dataguard architecture, high protection is provided against disasters that may occur in any situation.<\/p>\n<div class=\"pvc_clear\"><\/div>\n<p id=\"pvc_stats_55130\" class=\"pvc_stats all  \" data-element-id=\"55130\" style=\"\"><i class=\"pvc-stats-icon medium\" aria-hidden=\"true\"><svg aria-hidden=\"true\" focusable=\"false\" data-prefix=\"far\" data-icon=\"chart-bar\" role=\"img\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 512 512\" class=\"svg-inline--fa fa-chart-bar fa-w-16 fa-2x\"><path fill=\"currentColor\" d=\"M396.8 352h22.4c6.4 0 12.8-6.4 12.8-12.8V108.8c0-6.4-6.4-12.8-12.8-12.8h-22.4c-6.4 0-12.8 6.4-12.8 12.8v230.4c0 6.4 6.4 12.8 12.8 12.8zm-192 0h22.4c6.4 0 12.8-6.4 12.8-12.8V140.8c0-6.4-6.4-12.8-12.8-12.8h-22.4c-6.4 0-12.8 6.4-12.8 12.8v198.4c0 6.4 6.4 12.8 12.8 12.8zm96 0h22.4c6.4 0 12.8-6.4 12.8-12.8V204.8c0-6.4-6.4-12.8-12.8-12.8h-22.4c-6.4 0-12.8 6.4-12.8 12.8v134.4c0 6.4 6.4 12.8 12.8 12.8zM496 400H48V80c0-8.84-7.16-16-16-16H16C7.16 64 0 71.16 0 80v336c0 17.67 14.33 32 32 32h464c8.84 0 16-7.16 16-16v-16c0-8.84-7.16-16-16-16zm-387.2-48h22.4c6.4 0 12.8-6.4 12.8-12.8v-70.4c0-6.4-6.4-12.8-12.8-12.8h-22.4c-6.4 0-12.8 6.4-12.8 12.8v70.4c0 6.4 6.4 12.8 12.8 12.8z\" class=\"\"><\/path><\/svg><\/i> <img loading=\"lazy\" decoding=\"async\" width=\"16\" height=\"16\" alt=\"Loading\" src=\"https:\/\/dbtut.com\/wp-content\/plugins\/page-views-count\/ajax-loader-2x.gif\" border=0 \/><\/p>\n<div class=\"pvc_clear\"><\/div>\n","protected":false},"excerpt":{"rendered":"<p>In today&#8217;s article, I will be explaining Oracle Exadata 2, which is a continuation of my previous article. Active Storage \u2013 Cell Offload Oracle Exadata has a data transfer technology called Storage on Node or Cell Offload Processing on Cell. This technology means that existing processes run on Storage. Other products on the market perform &hellip;<\/p>\n<div class=\"pvc_clear\"><\/div>\n<p id=\"pvc_stats_55130\" class=\"pvc_stats all  \" data-element-id=\"55130\" style=\"\"><i class=\"pvc-stats-icon medium\" aria-hidden=\"true\"><svg aria-hidden=\"true\" focusable=\"false\" data-prefix=\"far\" data-icon=\"chart-bar\" role=\"img\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 512 512\" class=\"svg-inline--fa fa-chart-bar fa-w-16 fa-2x\"><path fill=\"currentColor\" d=\"M396.8 352h22.4c6.4 0 12.8-6.4 12.8-12.8V108.8c0-6.4-6.4-12.8-12.8-12.8h-22.4c-6.4 0-12.8 6.4-12.8 12.8v230.4c0 6.4 6.4 12.8 12.8 12.8zm-192 0h22.4c6.4 0 12.8-6.4 12.8-12.8V140.8c0-6.4-6.4-12.8-12.8-12.8h-22.4c-6.4 0-12.8 6.4-12.8 12.8v198.4c0 6.4 6.4 12.8 12.8 12.8zm96 0h22.4c6.4 0 12.8-6.4 12.8-12.8V204.8c0-6.4-6.4-12.8-12.8-12.8h-22.4c-6.4 0-12.8 6.4-12.8 12.8v134.4c0 6.4 6.4 12.8 12.8 12.8zM496 400H48V80c0-8.84-7.16-16-16-16H16C7.16 64 0 71.16 0 80v336c0 17.67 14.33 32 32 32h464c8.84 0 16-7.16 16-16v-16c0-8.84-7.16-16-16-16zm-387.2-48h22.4c6.4 0 12.8-6.4 12.8-12.8v-70.4c0-6.4-6.4-12.8-12.8-12.8h-22.4c-6.4 0-12.8 6.4-12.8 12.8v70.4c0 6.4 6.4 12.8 12.8 12.8z\" class=\"\"><\/path><\/svg><\/i> <img loading=\"lazy\" decoding=\"async\" width=\"16\" height=\"16\" alt=\"Loading\" src=\"https:\/\/dbtut.com\/wp-content\/plugins\/page-views-count\/ajax-loader-2x.gif\" border=0 \/><\/p>\n<div class=\"pvc_clear\"><\/div>\n","protected":false},"author":574,"featured_media":55139,"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,"_uf_show_specific_survey":0,"_uf_disable_surveys":false,"footnotes":""},"categories":[4],"tags":[],"class_list":["post-55130","post","type-post","status-publish","format-standard","has-post-thumbnail","","category-oracle"],"aioseo_notices":[],"a3_pvc":{"activated":true,"total_views":99,"today_views":0},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.9 - 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