ThroughputTestFZK < LCGTier2

<!-- keep this as a security measure:
   * Set ALLOWTOPICCHANGE = Main.TWikiAdminGroup,Main.LCGAdminGroup
   * Set ALLOWTOPICRENAME = Main.TWikiAdminGroup,Main.LCGAdminGroup
   #uncomment this if you want the page only be viewable by the internal people
   * #Set ALLOWTOPICVIEW = Main.TWikiAdminGroup,Main.LCGAdminGroup
-->

---+ Throughput Tests with FZK

These throughput tests were performed together with Bruno Hoeft. 

---++  Route, RTT and packet loss
<verbatim>
traceroute to f01-110-107-e.gridka.de (192.108.45.152), 30 hops max, 38 byte packets
 1  148.187.33.2 (148.187.33.2)  0.395 ms  0.396 ms  0.436 ms
 2  148.187.32.4 (148.187.32.4)  0.144 ms  0.131 ms  0.143 ms
 3  swima2.cscs.ch (148.187.20.2)  0.432 ms  0.421 ms  0.436 ms
 4  swiEL2-10GE-1-4.switch.ch (130.59.37.77)  3.245 ms  3.380 ms  3.248 ms
 5  swiCE3-10GE-1-3.switch.ch (130.59.37.65)  3.988 ms  3.977 ms  3.988 ms
 6  swiCE2-10GE-1-4.switch.ch (130.59.36.209)  4.134 ms  4.124 ms  4.137 ms
 7  switch.rt1.gen.ch.geant2.net (62.40.124.21)  4.132 ms  3.977 ms  3.988 ms
 8  so-7-2-0.rt1.fra.de.geant2.net (62.40.112.22)  12.123 ms  12.253 ms  12.267 ms
 9  dfn-gw.rt1.fra.de.geant2.net (62.40.124.34)  13.357 ms  12.210 ms  12.110 ms
10  xr-fzk1-te2-3.x-win.dfn.de (188.1.145.50)  15.053 ms  15.055 ms  14.922 ms
11  kr-fzk1.g-win.dfn.de (188.1.38.222)  15.203 ms  15.055 ms  15.075 ms
12  * * *
13  f01-110-107-e.gridka.de (192.108.45.152)  14.938 ms  14.842 ms  14.883 ms

--- f01-110-107-e.gridka.de ping statistics ---
43 packets transmitted, 43 received, 0% packet loss, time 42417ms
rtt min/avg/max/mdev = 14.866/15.028/15.313/0.141 ms, pipe 2
</verbatim>

---++ Influence of TCP window size and number of parallel streams

Bruno Hoeft from FZK found an optimal throughput of 700 Mbit/sec (with 4 parallel streams and a tcp window size of 4 MB) for sending to CSCS.

My own runs were performed starting at  2006-12-05 22:54h. There was some load from the worker nodes, but the CPU utilization was quite low.
But since =iperf= tests memory to memory, and the cluster bandwidth was not nearly used, the impact can be considered small. 

*Upload to FZK:*
<br /><img src="%ATTACHURLPATH%/pIL-TO-192.108.45.152.png" alt="pIL-TO-192.108.45.152.png" width='640' height='480' />

*Download from FZK:*
<br /><img src="%ATTACHURLPATH%/pIL-FROM-192.108.45.152.png" alt="pIL-FROM-192.108.45.152.png" width='640' height='480' />


-- Main.DerekFeichtinger - 06 Dec 2006

Attachments

Topic attachments
I	Attachment	History	Action	Size	Date	Who	Comment
png	pIL-FROM-192.108.45.152.png	r1	manage	6.6 K	2006-12-06 - 19:59	DerekFeichtinger
png	pIL-TO-192.108.45.152.png	r2 r1	manage	5.8 K	2006-12-06 - 19:58	DerekFeichtinger

This topic: LCGTier2 > WebHome > CMSInfoPages > CMSSiteLog > CMSThroughputTests > ThroughputTestFZK
Topic revision: r3 - 2006-12-08 - DerekFeichtinger