As SEOs,we surely will rethink its impact on the SERP of the site.
Not long ago,at Google Webmaster Central Forum,a debate attracted a lot of attentions of SEO professionals and webmasters.
The focus of the debate is whether a server downtime or outage that lasts several hours may have negative impact on the site's SERP.
Server outages to me is quite often seen.And each time I saw drastic drop of rankings for almost all optimized keywords of my site(s).By then,I just sense the connection between the outage and ranking drop.But I have no evident proof.
Today,Google published a post,How to deal with planned site downtime,tell we webmasters what possible impact a server outage may have and the suggested solution.
In the article,
Sometimes downtime is unavoidable: a webmaster might decide to take a site down due to ongoing site maintenance, or legal or cultural requirements. Outages that are not clearly marked as such can negatively affect a site’s reputation