perfSONAR User Q&A and Other Discussion

["Karch, Roland" <>]

Hi Angela,

 

for one way delay metrics, it is important to have a well synchronized clock, especially when measuring between two end points very close to each other. The following might be resources worth to investigate:

 

RFC 2679 chapter 3.5

OWAMP cookbook search for “NTP”

 

Hope that helps!

 

With best wishes,

Roland

--

Roland Karch, DFN-Labor

Friedrich-Alexander-Universität Erlangen-Nürnberg

Regionales RechenZentrum Erlangen (RRZE)

Martensstraße 1, 91058 Erlangen, Germany

Tel. +49 9131 85-27806, -28800, Fax: +49 9131 302941

http://www-win.rrze.uni-erlangen.de/

 

 

 

From: [mailto:] On Behalf Of ???
Sent: Sunday, May 25, 2014 3:12 AM
To:
Subject: [perfsonar-user] time too long

 

Dear all,

 

I install owampd on 10.21.10.120.

I uesd owping, from 10.21.11.171 to 10.21.10.120.

But it is too long.

I used ping, only need less than 1 ms.

Why the time of owping is too long?

Thanks in advance.

 

[root@angela ~]# owping  10.21.10.120

Approximately 13.1 seconds until results available

 

--- owping statistics from [ip247.puli11-21-10.ncnu.edu.tw]:8942 to [10.21.10.120]:49546 ---

SID:    0a150a78d72bbff184726d0437db9567

first:  2014-05-25T09:03:45.593

last:   2014-05-25T09:03:55.971

100 sent, 0 lost (0.000%), 0 duplicates

one-way delay min/median/max = 425/1.09e+03/1.11e+03 ms, (err=0.969 ms)

one-way jitter = 16.3 ms (P95-P50)

TTL not reported

no reordering

 

 

--- owping statistics from [10.21.10.120]:37393 to [ip247.puli11-21-10.ncnu.edu.tw]:8874 ---

SID:    0a150bf7d72bbff06ace57103357a55e

first:  2014-05-25T09:03:45.606

last:   2014-05-25T09:03:55.671

100 sent, 0 lost (0.000%), 0 duplicates

one-way delay min/median/max = -1.11e+03/-1.09e+03/-425 ms, (err=0.969 ms)

one-way jitter = 667 ms (P95-P50)

TTL not reported

no reordering

 

With best regards,

Angela

May 25

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