Number of 9's

Ever wondered terminology of Number of 9's in SLA. See the actual downtime offered by multiple vendors in market.

Number of 9’s

Availability Percentage

Total Annual Downtime

2

99%

3 days, 15 hours

3

99.90%

8 hours, 45 minutes

4

99.99%

52 minutes, 34 seconds

5

99.999%

5 minutes, 15 seconds

Hope this helps understanding SLA 

 

1 Comment

99.9% ("three nines")

SF

99.95%

VCS

99.99% ("four nines")

SF/HA

99.999% ("five nines")

SF CFS/HA

To the above entry by capt. jack, I'd like to throw into the hoard a few gold coins of my own.

To achieve a particular nine, the appropriate Symantec product is mapped.