This link has been bookmarked by 32 people . It was first bookmarked on 30 Oct 2008, by David Harrison.
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Sean BiehleThe reliability of cloud computing has been a hot topic recently, partly because glitches in the cloud don't happen behind closed doors as with traditional on-premises solutions for businesses. Instead, when a small number of cloud computing users have pr
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The reliability of cloud computing has been a hot topic recently, partly because glitches in the cloud don't happen behind closed doors as with traditional on-premises solutions for businesses. Instead, when a small number of cloud computing users have problems, it makes headlines. As with most things at Google, we are fanatical about measuring the availability of Gmail, and we thought it best to simply share our reliability metrics, which we measure as average uptime per user based on server-side error rates. We think this reliability metric lets you do a true side-by-side comparison with other solutions.
We measure every server request for every user, every moment of every day. Any millisecond delay is logged. Over the last year, Gmail has been available more than 99.9 percent of the time — for everyone, both consumers and business users. The vast majority of people using Gmail have seen few issues, experienced no downtime, and have continued to have a great Gmail experience, with exception of an outage in August 2008. If you average all these data together, including the August outage, across the entire Gmail service, there has been an aggregate 10-15 minutes of downtime per month over the last year of providing the service. That 10-15 minutes per month average represents small delays of a couple of seconds here and there. A very small number of people have unfortunately been subject to some disruption of service that affected them for a few minutes or a few hours. For those users, we are very sorry. And for Google Apps Premier Edition customers, we have extended service level agreement credits to them.
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Arvind Natarajangood numbers in support of SaaS
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Gustavo Chaves"Gmail is twice as reliable as a Novell GroupWise solution, and four times more reliable than a Microsoft Exchange-based solution that companies must maintain themselves. Gmail's reliability jumps to more than four times as reliable as a GroupWise solutio
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30 Oct 08
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Looking just at the unplanned outages that catch IT staffs by surprise, these results suggest Gmail is twice as reliable as a Novell GroupWise solution, and four times more reliable than a Microsoft Exchange-based solution that companies must maintain themselves. And higher reliability translates to higher employee productivity. Gmail's reliability jumps to more than four times as reliable as a GroupWise solution and 10 times more reliable than an Exchange-based solution if you factor in the planned outages inherent in on-premises messaging platforms. But this isn't the only way Google Apps helps businesses do more with their resources. Compared to the costs of Microsoft Exchange, IBM Lotus or Novell GroupWise — including software licensing, server expenses and the labor associated with deploying, maintaining and upgrading them on a regular basis — Google Apps leaves companies with much more time and money to focus on their real business
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Google is one of the 1 million businesses that run on Google Apps, and any service interruption affects our users and our business; our engineers are also some of our most demanding customers. We understand the importance of delivering on the cloud's promise of greater security, reliability and capability at lower cost. We are hugely thankful to our customers who drive us to become better every day.
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