{"id":722,"date":"2012-04-06T23:58:36","date_gmt":"2012-04-06T15:58:36","guid":{"rendered":"https:\/\/yangtingkun.net\/?p=722"},"modified":"2012-04-09T23:59:30","modified_gmt":"2012-04-09T15:59:30","slug":"%e9%80%9a%e8%bf%87%e6%95%b0%e6%8d%ae%e5%ba%93%e9%93%be%e6%9f%a5%e8%af%a2%e4%bc%9a%e5%af%bc%e8%87%b4%e6%ba%90%e5%92%8c%e7%9b%ae%e6%a0%87%e5%ba%93scn%e5%90%8c%e6%ad%a5","status":"publish","type":"post","link":"https:\/\/yangtingkun.net\/?p=722","title":{"rendered":"\u901a\u8fc7\u6570\u636e\u5e93\u94fe\u67e5\u8be2\u4f1a\u5bfc\u81f4\u6e90\u548c\u76ee\u6807\u5e93SCN\u540c\u6b65"},"content":{"rendered":"<p>\u5728\u901a\u8fc7\u6570\u636e\u5e93\u94fe\u6267\u884c\u8de8\u6570\u636e\u5e93\u7684\u67e5\u8be2\u65f6\uff0cOracle\u4f1a\u81ea\u52a8\u5c06\u4e24\u4e2a\u6570\u636e\u5e93\u7684SCN\u8fdb\u884c\u540c\u6b65\u3002<\/p>\n<p>\u4ee5\u524dEygle\u63d0\u5230\u8fc7\u8fd9\u4e2a\u95ee\u9898\uff0c\u8fd9\u6b21\u5728\u8ba8\u8bba\u4e00\u4e2a\u548c\u8fdc\u7aef\u6570\u636e\u5e93SCN\u6709\u5173\u7684\u95ee\u9898\u65f6\uff0c\u53c8\u78b0\u5230\u4e86\u8fd9\u4e2a\u95ee\u9898\uff0c\u4e8e\u662f\u7b80\u5355\u8bb0\u5f55\u4e00\u4e0b\u3002<\/p>\n<pre lang='SQL'>SQL> conn test\/test@192.168.0.19:1666\/ora102044\r\nConnected.\r\nSQL> select current_scn from v$database;\r\nCURRENT_SCN\r\n-----------\r\n2745758\r\nSQL> conn test\/test@192.168.0.20:15210\/orcl\r\nConnected.\r\nSQL> select current_scn from v$database;\r\nCURRENT_SCN\r\n-----------\r\n5642527\r\nSQL> create database link ora102044 \r\n2 connect to test\r\n3 identified by test\r\n4 using '192.168.0.19:1666\/ora102044';\r\nDatabase link created.\r\nSQL> select current_scn from v$database@ora102044;\r\nCURRENT_SCN\r\n-----------\r\n5642628\r\nSQL> select current_scn from v$database;\r\nCURRENT_SCN\r\n-----------\r\n5642638\r\nSQL> conn test\/test@192.168.0.19:1666\/ora102044\r\nConnected.\r\nSQL> select current_scn from v$database;\r\nCURRENT_SCN\r\n-----------\r\n5642702<\/pre>\n<p>\u53ef\u4ee5\u770b\u5230\uff0c\u5728\u901a\u8fc7\u6570\u636e\u5e93\u94fe\u6267\u884c\u67e5\u8be2\u540e\uff0cOracle\u4f1a\u540c\u6b65\u4e24\u4e2a\u6570\u636e\u5e93\u7684SCN\uff0c\u53d6\u4e24\u4e2a\u6570\u636e\u5e93\u6700\u5927\u7684SCN\u4f5c\u4e3a\u65b0\u7684SCN\uff0c\u6267\u884c\u67e5\u8be2\u65f6\u523b\uff0c\u4e24\u4e2a\u6570\u636e\u5e93\u7684SCN\u4e00\u81f4\u3002<br \/>\nOracle\u7684\u8fd9\u4e2a\u673a\u5236\u5e94\u8be5\u662f\u4e3a\u4e86\u5206\u5e03\u5f0f\u67e5\u8be2\u7684\u4e00\u81f4\u6027\uff0c\u8fd9\u6837\u4e00\u4e2a\u67e5\u8be2\u53ea\u9700\u8981\u4e00\u4e2aSCN\u5c31\u53ef\u4ee5\u5728\u5206\u5e03\u5f0f\u67e5\u8be2\u7684\u4efb\u4f55\u4e00\u4e2a\u6570\u636e\u5e93\u4e2d\u6765\u83b7\u53d6\u4e00\u81f4\u6027\u3002<br \/>\n\u4f46\u662f\u8fd9\u79cd\u5b9e\u73b0\u4e5f\u4f1a\u5b58\u5728\u4e00\u5b9a\u7684\u6f5c\u5728\u95ee\u9898\uff0c\u5176\u4e2d\u4e00\u4e2a\u6570\u636e\u5e93\u7684SCN\u53ef\u80fd\u4f1a\u4ece\u4e00\u4e2a\u8f83\u4f4e\u7684\u6570\u503c\uff0c\u4e00\u4e0b\u589e\u957f\u5230\u4e00\u4e2a\u5f88\u9ad8\u7684\u6570\u636e\u3002\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0cORA102044\u6570\u636e\u5e93\u7684SCN\u5c31\u589e\u52a0\u4e86\u4e00\u500d\u4ee5\u4e0a\u3002\u800c\u5bf9\u4e8e\u5b9e\u9645\u73af\u5883\u4e2d\uff0cSCN\u7684\u589e\u52a0\u53ef\u80fd\u662f\u51e0\u500d\u3001\u51e0\u5341\u500d\u751a\u81f3\u662f\u4e0a\u767e\u500d\uff0c\u4ece\u800c\u5f15\u53d1\u4e00\u4e9b\u5176\u4ed6\u7684bug\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728\u901a\u8fc7\u6570\u636e\u5e93\u94fe\u6267\u884c\u8de8\u6570\u636e\u5e93\u7684\u67e5\u8be2\u65f6\uff0cOracle\u4f1a\u81ea\u52a8\u5c06\u4e24\u4e2a\u6570\u636e\u5e93\u7684SCN\u8fdb\u884c\u540c\u6b65\u3002 \u4ee5\u524dEygle\u63d0\u5230\u8fc7\u8fd9\u4e2a\u95ee\u9898\uff0c\u8fd9\u6b21\u5728\u8ba8\u8bba\u4e00\u4e2a\u548c\u8fdc\u7aef\u6570\u636e\u5e93SCN\u6709\u5173\u7684\u95ee\u9898\u65f6\uff0c\u53c8\u78b0\u5230\u4e86\u8fd9\u4e2a\u95ee\u9898\uff0c\u4e8e\u662f\u7b80\u5355\u8bb0\u5f55\u4e00\u4e0b\u3002 SQL> conn test\/test@192.168.0.19:1666\/ora102044 Connected. SQL> select current_scn from v$database; CURRENT_SCN &#8212;&#8212;&#8212;&#8211; 2745758 SQL> conn test\/test@192.168.0.20:15210\/orcl Connected. SQL> select current_scn from v$database; CURRENT_SCN &#8212;&#8212;&#8212;&#8211; 5642527 SQL> create database link ora102044 2 connect to test 3 identified by test 4 &hellip; <a href=\"https:\/\/yangtingkun.net\/?p=722\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[3],"tags":[603,602,601],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p2yiY3-bE","_links":{"self":[{"href":"https:\/\/yangtingkun.net\/index.php?rest_route=\/wp\/v2\/posts\/722"}],"collection":[{"href":"https:\/\/yangtingkun.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/yangtingkun.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/yangtingkun.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/yangtingkun.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=722"}],"version-history":[{"count":2,"href":"https:\/\/yangtingkun.net\/index.php?rest_route=\/wp\/v2\/posts\/722\/revisions"}],"predecessor-version":[{"id":725,"href":"https:\/\/yangtingkun.net\/index.php?rest_route=\/wp\/v2\/posts\/722\/revisions\/725"}],"wp:attachment":[{"href":"https:\/\/yangtingkun.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=722"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/yangtingkun.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=722"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/yangtingkun.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=722"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}