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Site Down Time For Maintenance

Web Bureau


25 January 2011 by Web Bureau

For example, instead of returning an HTTP result code 404 (Not Found) or showing an error page with the status code 200 (OK) when a page is requested, it’s better to return a 503 HTTP result code (Service Unavailable) which tells search engine crawlers that the downtime is temporary. Moreover, it allows webmasters to provide visitors and bots with an estimated time when the site will be up and running again. If known, the length of the downtime in seconds or the estimated date and time when the downtime will be complete can be specified in an optional Retry-After header, which Googlebot may use to determine when to recrawl the URL.

 

Returning a 503 HTTP result code can be a great solution for a number of other situations. We encounter a lot of problems with sites that return 200 (OK) result codes for server errors, downtime, bandwidth-overruns or for temporary placeholder pages (“Under Construction”). The 503 HTTP result code is the webmaster’s solution of choice for all these situations. As for planned server downtime like hardware maintenance, it’s a good idea to have a separate

server available to actually return the 503 HTTP result code. It is important, however, to not treat 503 as a permanent solution: lasting 503s can eventually be seen as a sign that the server is now permanently unavailable and can result in us removing URLs from Google’s index.

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