How to calculate system uptime and downtime in C#

Question

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I have some xml data they are passing last_time_down and last_time_up but how to calculate uptime and downtime with percentage.
Please see my xml data.

I need calculation also. Note : I want get data filter by today or this month or yesterday or last 24 hours.

XML

<hoststatus id="49495">
   <host_id>3132</host_id>
   <name>zacnvstsapex01</name>
   <display_name>zacnvstsapex01</display_name>
   <address>172.18.95.2</address>
   <alias>ex Test Server</alias>
   <status_update_time>2015-09-19 07:58:26</status_update_time>
   <status_text>OK - 172.18.95.2: rta 5.647ms, lost 0%</status_text>
   <status_text_long/>
   <current_state>0</current_state>
   <performance_data>
     rta=5.647ms;3000.000;5000.000;0; pl=0%;80;100;; rtmax=14.706ms;;;; rtmin=0.863ms;;;;
   </performance_data>
   <should_be_scheduled>1</should_be_scheduled>
   <check_type>0</check_type>
   <last_state_change>1970-01-01 02:00:00</last_state_change>
   <last_hard_state_change>1970-01-01 02:00:00</last_hard_state_change>
   <last_hard_state>0</last_hard_state>
   <last_time_up>2015-09-19 07:58:26</last_time_up>
   <last_time_down>1970-01-01 02:00:00</last_time_down>
   <last_time_unreachable>1970-01-01 02:00:00</last_time_unreachable>
   <last_notification>1970-01-01 02:00:00</last_notification>
   <next_notification>1970-01-01 02:00:00</next_notification>
   <no_more_notifications>0</no_more_notifications>
   <acknowledgement_type>0</acknowledgement_type>
   <current_notification_number>0</current_notification_number>
   <event_handler_enabled>1</event_handler_enabled>
   <process_performance_data>1</process_performance_data>
   <obsess_over_host>1</obsess_over_host>
   <modified_host_attributes>0</modified_host_attributes>
   <event_handler/>
   <check_command>check_xi_host_ping!3000.0!80%!5000.0!100%</check_command>
   <normal_check_interval>5</normal_check_interval>
   <retry_check_interval>1</retry_check_interval>
   <check_timeperiod_id>125</check_timeperiod_id>
   <has_been_checked>1</has_been_checked>
   <current_check_attempt>1</current_check_attempt>
   <max_check_attempts>5</max_check_attempts>
   <last_check>2015-09-19 07:58:26</last_check>
   <next_check>2015-09-19 08:03:26</next_check>
 </hoststatus>

I am using this type of calculation but am not getting exact data.

C#

var src = Convert.ToDateTime(result.GetString(result.GetOrdinal("status_update_time")));
                           var hm = new DateTime(src.Year, src.Month, src.Day, src.Hour, src.Minute, 0);
                           var dow = Convert.ToDateTime(result.GetString(result.GetOrdinal("last_time_down")));
                           var dm = new DateTime(dow.Year, dow.Month, dow.Day, dow.Hour, dow.Minute, 0);
                           var uptime = hm;
                           var downtime = hm - dm;
                           double up = uptime.Ticks / 6000;
                           double dt = downtime.Ticks / 6000;
                           double percentage = (double)(up / (up + dt) * 100);
                           string slastatus = percentage > Convert.ToDouble(_inputpercentage) ? "PASSED" : "FAILED";
                           hostlist.Add(new HostData
                           {
                               host_id = result.GetString(result.GetOrdinal("host_id")),
                               status_update_time = result.GetString(result.GetOrdinal("status_update_time")),
                               last_time_down = result.GetString(result.GetOrdinal("last_time_down")),
                               alias = result.GetString(result.GetOrdinal("alias")),
                               display_name = result.GetString(result.GetOrdinal("display_name")),
                               uptime = ((int)Math.Ceiling(percentage)).ToString("0.00") + "%",
                               status = slastatus,
                               totaluptime = (float)percentage
                           });

Posted 5-Oct-15 0:53am

Mohamed Hasan Shali

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Comments

Maciej Los 5-Oct-15 7:57am

What is expected output?

Mohamed Hasan Shali 6-Oct-15 13:12pm

we need uptime percentage.

var uptime = hm;
var downtime = hm - dm;
double up = uptime.Ticks / 6000;
double dt = downtime.Ticks / 6000;
double percentage = (double)(up / (up + dt) * 100);

this is my calculation but I didn't get exat data.

2 solutions

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This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Sergey Alexandrovich Kryukov · Answer 1 · 2015-10-05T02:35:00

Solution 1

Don't use ticks. Don't mix up time (a point on the time line), with duration (time span between to points in time). Use the type System.TimeSpan in addition to System.DateTime:

C#

System.DateTime first = //...
System.DateTime second = System.DateTime.Now;
System.TimeSpan duration = second - first; // operator defined
var allYouWantedToKnowAboutDurationButWasAfraidToAsk = duration.// ...anything, see MSDN: :-)

https://msdn.microsoft.com/en-us/library/system.timespan%28v=vs.110%29.aspx[^].

—SA

Posted 5-Oct-15 2:35am

Sergey Alexandrovich Kryukov

Comments

Maciej Los 5-Oct-15 12:43pm

I wouldn't be able to say it better!

Sergey Alexandrovich Kryukov 5-Oct-15 15:28pm

Thank you, Maciej.
—SA

Mohamed Hasan Shali 6-Oct-15 2:07am

Maciej Los @ how to calculate uptime percentage by duration?

Sergey Alexandrovich Kryukov 6-Oct-15 2:53am

Please define percentage.
—SA

Maciej Los · Answer 2 · 2015-10-05T06:42:00

In addition to solution 1 by Sergey Alexandrovich Kryukov[^], i would like to provide sample (using LinqToXml[^]):

C#

var result = xdoc.Descendants("hoststatus")
       .Select(x=>new
           {
               hostid = (int)x.Element("host_id"),
               statusUpdTime = (DateTime)x.Element("status_update_time"),
               lastDownTime = (DateTime)x.Element("last_time_down"),
               alias = (string)x.Element("alias"),
               timeDiff = (TimeSpan)((DateTime)x.Element("status_update_time") - (DateTime)x.Element("last_time_down"))
           });

result:

hostid statusUpdTime       lastDownTime        alias          timeDiff
3132   2015-09-19 07:58:26 1970-01-01 02:00:00 ex Test Server 16697.05:58:26

How to calculate system uptime and downtime in C#

2 solutions

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Solution 2

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How to calculate system uptime and downtime in C#

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