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Sitemap文件标准格式和大小说明

Sitemap文件标准格式： Sitemap文件通常是一个以XML格式编写的文本文件，其中包含URL信息和其他相关数据。Sitemap文件主要包含以下元素： 1. URL元素：用于指定页面的网址，并包含可选的数据，如最近的修改日期、相对于站点的相对权重等。 2. loc元素：为URL元素的子元素，用于指定页面的网址。 3. lastmod元素：为URL元素的子元素，用于指定页面的最近修改日期。 4. changefreq元素：为URL元素的子元素，用于指定页面内容的更改频率。 5. priority元素：为URL元素的子元素，用于指定页面相对于站点中其他页面的优先级。 Sitemap文件大小说明： Sitemap文件的大小可以是任意的，但是建议每个Sitemap文件大小不要超过50MB，并且包含的URL数量不要超过50000条。如果您的网站包含很多页面，则可以使用Sitemap索引文件来包含多个Sitemap文件。Sitemap索引文件的大小不应超过10MB，并且包含的Sitemap文件数量不应超过50000个。注：以上大小限制是Google搜索引擎的要求，其他搜索引擎可能会有不同的大小限制。

Public @ 2023-04-29 02:50:12

301永久重定向

301永久重定向是一种非常重要的“自动转向”技术，是网址重定向最为可行的一种办法。当用户或搜索引擎向网站服务器发出浏览请求时，服务器返回的HTTP数据流中头信息(header)中的状态码的一种，表示本网页永久性转移到另一个地址。301永久重定向：这是SEO中的一个基础名词，在URL规范化中会用到，也许大家都知道这个名词，但是由于应用的不是非常频繁，导致很多专业做SEO的朋友都不是很熟悉301永久重

Public @ 2013-02-22 16:09:41

搜索引擎收录机制是什么？

搜索引擎收录机制就是搜索引擎系统执行网页抓取、URL分析、文本链接分析、内容分析及网页排序等一系列操作而形成的一种机制。这个机制由爬虫、索引和查询构成，爬虫存储所有网络上数据、分析搜索引擎索引，而搜索引擎索引就像物理上的索引一样，能让搜索引擎定位到目标页面；最后查询的时候则是让搜索引擎根据索引定位相应的页面，最终完成数据的展示。

Public @ 2023-03-03 13:00:15

创建Sitemap时有哪些注意事项？

第一，一个Sitemap文件包含的网址不得超过 5 万个，且文件大小不得超过 10 MB。如果您的Sitemap超过了这些限值，请将其拆分为几个小的Sitemap。这些限制条件有助于确保您的网络服务器不会因提供大文件而超载。第二，一个站点支持提交的sitemap文件个数必须小于5万个，多于5万个后会不再处理，并显示“链接数超”的提示。第三，如果验证了网站的主域，那么Sitemap文件中可包含该网站

Public @ 2009-04-13 16:09:43

sitemap提交后，多久能被百度抓取？

sitemap数据提交后，一般在1小时内会被百度处理。处理完成的时间视文件大小而定。

Public @ 2012-11-22 16:11:57

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基本文件流程错误 SQL 调试

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[ DB ] CONNECT:[ UseTime:0.028228s ] mysql:dbname=briline.net;host=106.14.77.182;port=3306;charset=utf8
[ SQL ] SHOW COLUMNS FROM `ob_article` [ RunTime:0.020274s ]
[ SQL ] SELECT * FROM `ob_article` WHERE `id` = 7910 LIMIT 1 [ RunTime:0.019163s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'type' => 'const', 'possible_keys' => 'PRIMARY', 'key' => 'PRIMARY', 'key_len' => '4', 'ref' => 'const', 'rows' => 1, 'extra' => NULL, ) ]
[ SQL ] select * from `ob_article_tongji` where category_id=12 and mark_type='cate' order by times desc limit 15 [ RunTime:0.019301s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article_tongji', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 608, 'extra' => 'Using where; Using filesort', ) ]
[ SQL ] select * from `ob_article_tongji` where category_id=12 and mark_type='tags' order by times desc limit 100 [ RunTime:0.019682s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article_tongji', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 608, 'extra' => 'Using where; Using filesort', ) ]
[ SQL ] select * from `ob_article_tongji` where category_id=12 and mark_type='tags' order by rand() limit 30 [ RunTime:0.020262s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article_tongji', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 608, 'extra' => 'Using where; Using temporary; Using filesort', ) ]
[ SQL ] SELECT * FROM `ob_article` WHERE `id` = 7910 LIMIT 1 [ RunTime:0.018971s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'type' => 'const', 'possible_keys' => 'PRIMARY', 'key' => 'PRIMARY', 'key_len' => '4', 'ref' => 'const', 'rows' => 1, 'extra' => NULL, ) ]
[ SQL ] update `ob_article` set views=views+1 where id=7910 [ RunTime:0.021554s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `ob_article` WHERE `category_id` = 12 AND `cate` = '威海网站结构优化' AND `status` <> -1 LIMIT 1 [ RunTime:0.026011s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 9562, 'extra' => 'Using where', ) ]
[ SQL ] SELECT * FROM `ob_article` WHERE `category_id` = 12 AND `cate` = '威海网站结构优化' AND `status` <> -1 ORDER BY rand() LIMIT 0,2 [ RunTime:0.040146s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 9562, 'extra' => 'Using where; Using temporary; Using filesort', ) ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `ob_article` WHERE `category_id` = 12 AND `tags` = '威海Sitemap' AND `status` <> -1 LIMIT 1 [ RunTime:0.025789s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 9562, 'extra' => 'Using where', ) ]
[ SQL ] SELECT * FROM `ob_article` WHERE `category_id` = 12 AND `tags` = '威海Sitemap' AND `status` <> -1 ORDER BY rand() LIMIT 0,2 [ RunTime:0.036414s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 9562, 'extra' => 'Using where; Using temporary; Using filesort', ) ]

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