top button
Flag Notify
    Connect to us
      Facebook Login
      Site Registration

Facebook Login
Site Registration

HA: What five nines signify in the context of high availability ?

+1 vote
57 views

If a system supports less than 5 nines for the high availability then how it is different from the system which supports high availability up to five nines.

posted Feb 28, 2016 by Alok

Share this question
Facebook Share Button Twitter Share Button LinkedIn Share Button

2 Answers

+1 vote

Hi

5 nines is 99.999%. It means the system must be up for 99.999% of the time.

It could be down for less than 25.92 seconds in a month(30 days) or 315.36 seconds in an year(365 days).
A system is said to be HA only if it meets 5 nines up-time.

Thanks.

answer Feb 29, 2016 by Shivananda Gavalkar S
0 votes

Five nine means 99.999% availability of any system, Which means that you system should not be down for more then .001% in a given period of time. Which translates to max 25 sec outage in a month or 311 seconds outage in a year.

answer Feb 29, 2016 by Salil Agrawal
Similar Questions
+4 votes

If I talk about high availability then couple of question comes out.

  1. To support HA, we need to reserve extra h/w or nodes ?
  2. How HA differs from data plane nodes to control plane nodes. I checked cisco sgw features "It is mentioned their sgw supports 99.9999 system availability" ? what are the factors derive this % value ?
+3 votes

Can someone please explain following terms to help me understand ?
Throughput, Turn Around Time, Waiting Time and Response Time.

Contact Us
+91 9880187415
sales@queryhome.net
support@queryhome.net
#280, 3rd floor, 5th Main
6th Sector, HSR Layout
Bangalore-560102
Karnataka INDIA.
QUERY HOME
...