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？ CDN是內(nèi)容分發(fā)網(wǎng)絡(luò)（Content Delivery Network）的縮寫，它是指一種分布在多個位置的網(wǎng)絡(luò)服務(wù)，使用多個節(jié)點，從而實現(xiàn)在網(wǎng)絡(luò)上特定位置的最佳內(nèi)容傳輸，并被廣泛用來提高網(wǎng)站的內(nèi)容下載速度。使用CDN可以縮短用戶到服務(wù)器的距離，使其訪問網(wǎng)站時可以更快的收到內(nèi)容，如果沒有CDN的使用，就會引起網(wǎng)站的抓取異常。如果使用了CDN，就會使網(wǎng)站的內(nèi)容復(fù)制到CDN上，用戶請求網(wǎng)站資源時，就會先從CDN上請求資源，然后從主運營商那里獲取內(nèi)容，如果CDN上的資源并沒有更新，就會出現(xiàn)網(wǎng)站抓取異常，這時需要將CDN上的資源更新到最新的網(wǎng)站資源，以確保網(wǎng)站抓取的盡可能的準(zhǔn)確。

Public @ 2023-03-03 08:00:21

沒有放之四海皆準(zhǔn)的SEO技巧

威海seo專題威海seo技巧
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經(jīng)常有讀者在留言中提一些有關(guān)SEO技巧的問題，大部分時候我都盡量回答，但也有擔(dān)心。沒有任何一條搜索引擎優(yōu)化技巧是放之四海而皆準(zhǔn)的。就像治病一樣，某種藥在大部分情況下可以治某種病，但是有時候相同的病癥可能得病的原因會很不一樣，需要用的藥也不一樣。要知道用什么藥，得先做診斷，而不是脫離實際地給藥。讀者問的問題，一般來說沒辦法把整個網(wǎng)站的背景情況寫出來，那得寫好多，就算寫出來，我也沒時間去看，去研究。所

Public @ 2020-09-01 15:26:33

Google Notebook和Google排名

威海seo專題威海谷歌seo
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前幾天在新聞發(fā)布會上預(yù)告的Google Notebook今天已經(jīng)正式推出了。很好用，可以存文字，圖片，網(wǎng)頁等，確實是一個方便的筆記本，而且可以在任何地方使用?；脺绲牟┛陀斜容^詳細(xì)的使用說明 http://www.kenwong.cn/post/google-notebook-now-live.html 。補充幾點:1)Google Notebook的內(nèi)容是存在Google服務(wù)器上的，不在你的電腦里

Public @ 2014-09-24 15:30:11

CDN的原理及對SEO的影響

威海seo專題威海CDN與seo
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### 一、什么是CDN CDN（Content Delivery Network）即內(nèi)容分發(fā)網(wǎng)絡(luò)，它是一種分布式的網(wǎng)絡(luò)加速技術(shù)，是把靜態(tài)資源分布到網(wǎng)絡(luò)的各個節(jié)點，利用中間節(jié)點緩存和加速技術(shù)來提高訪問響應(yīng)速度，減少網(wǎng)絡(luò)流量，提高網(wǎng)絡(luò)吞吐率。 CDN 的主要應(yīng)用場景有： 1.提高網(wǎng)站訪問速度：采用 CDN 可以把網(wǎng)站內(nèi)容從網(wǎng)站服務(wù)器復(fù)制到不同地方，使每個訪問從最近的服務(wù)器上取得，以此來提

Public @ 2023-02-24 09:13:24

CDN對網(wǎng)站在搜索引擎中的影響

威海seo專題威海CDN與seo
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CDN（內(nèi)容分發(fā)網(wǎng)絡(luò)）可以幫助網(wǎng)站優(yōu)化網(wǎng)絡(luò)加載性能，改善搜索引擎給予網(wǎng)站的排名。使用內(nèi)容分發(fā)網(wǎng)絡(luò)，一個網(wǎng)站的內(nèi)容可以被分發(fā)到多個服務(wù)器上，當(dāng)用戶嘗試訪問網(wǎng)站時，CDN網(wǎng)絡(luò)會自動從最近的服務(wù)器中提供內(nèi)容，從而提升其加載速度。搜索引擎爬蟲會根據(jù)站點加載速度來決定排名，CDN能夠提高站點的加載速度，這樣就可能會獲得良好的搜索引擎排名。此外，因為CDN網(wǎng)絡(luò)能夠提供優(yōu)質(zhì)的用戶體驗，搜索引擎也會考慮這

Public @ 2023-02-25 05:00:21

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基本文件流程錯誤 SQL 調(diào)試

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[ DB ] CONNECT:[ UseTime:0.026372s ] mysql:dbname=briline.net;host=106.14.77.182;port=3306;charset=utf8
[ SQL ] SHOW COLUMNS FROM `ob_article` [ RunTime:0.018739s ]
[ SQL ] SELECT * FROM `ob_article` WHERE `id` = 6205 LIMIT 1 [ RunTime:0.017724s ]
[ 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:0.018114s ]
[ 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:0.018144s ]
[ 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:0.018182s ]
[ 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` = 6205 LIMIT 1 [ RunTime:0.017782s ]
[ 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+2 where id=6205 [ RunTime:0.018529s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `ob_article` WHERE `category_id` = 12 AND `cate` = '威海seo專題' AND `status` <> -1 LIMIT 1 [ RunTime:0.040594s ]
[ 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seo專題' AND `status` <> -1 ORDER BY rand() LIMIT 0,2 [ RunTime:0.048079s ]
[ 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CDN與seo' AND `status` <> -1 LIMIT 1 [ RunTime:0.026150s ]
[ 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CDN與seo' AND `status` <> -1 ORDER BY rand() LIMIT 0,2 [ RunTime:0.034075s ]
[ 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', ) ]

0.493574s

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什么是CDN？使用CDN為什么會出現(xiàn)網(wǎng)站抓取異常

沒有放之四海皆準(zhǔn)的SEO技巧

Google Notebook和Google排名

CDN的原理及對SEO的影響

CDN對網(wǎng)站在搜索引擎中的影響

更多您感興趣的搜索

国产成人精品999视频&日本一区二区亚洲人妻精品&久久久精品国产99久久精&99热这里只有成人精品国产&精品国产剧情av一区二区&成人亚洲精品久久久久app&国产精品美女高潮抽搐A片

Categories

Tags

什么是CDN？使用CDN為什么會出現(xiàn)網(wǎng)站抓取異常

沒有放之四海皆準(zhǔn)的SEO技巧

Google Notebook和Google排名

CDN的原理及對SEO的影響

CDN對網(wǎng)站在搜索引擎中的影響

更多您感興趣的搜索

什么是CDN？使用CDN為什么會出現(xiàn)網(wǎng)站抓取異常