These concerns center on critical
applications and data being available. Well-publicized incidents of cloud
outages include Gmail (one-day outage in mid-October 2008), Amazon S3 (over
seven-hour downtime on July 20, 2008), and FlexiScale (18-hour outage on
October 31, 2008).
Availability Threat #1.
Uptime
As with the Traditional Security concerns,
cloud providers argue that their server uptime compares well with the
availability of the cloud user’s own data centers.
![]() |
| Uptime |
Besides just services and applications being down, this includes the
concern that a third-party cloud would not scale well enough to handle certain
applications. SAP’s CEO, Leo Apotheker said: “There are certain things that you cannot run in the cloud because the
cloud would collapse…Don't believe that any utility company is going to run its
billing for 50 million consumers in the cloud.”
