r2 - 08 Jul 2009 - 12:29:56 - RobertGardnerYou are here: TWiki >  Admins Web > LoadTests

LoadTests

Introduction

The following contains results from load tests performed during Phase 9 of the Integration program (FY09Q3, April-June 2009). Results from previous phases:

Sustained 200 MB/s Tier 1 - Tier 2 goal

Sustained 400 MB/s Tier 1 - Tier 2 goal

MWT2

  • From Hiro:

There was a throughput test from BNL to UC today. As seen from the attachments, UC has passed our milestone for 400MB/s for about 1 hour.

NOTE: BNL FTS was re-configured (moved to the different host) in BNL-UC channel to use gridftp2 to allow direct writing to selected write pools of UC while maintaining the traffic through UC gridftp doors for private IP write pools.

  • bnl doors:
    load_test_UC_2009_06_19_bnldcdoors.png

  • bnl-uc network plot:
    load_test_UC_2009_06_19_bnlucnetwork.png

  • uc switch:
    load_test_UC_2009_06_19_ucswitch.png

MWT2 Inter-site bandwidth test

  • From Charles Waldman:

MWT2 - IU -> UC achieved 1.2 GB/s. This was done with srmcp, not lcg-cp. I was not able to get lcg-cp to work in the needed passive or gridftp2 mode.

The actual command and flags used was:

for x in {1..100} ; do
srmcp -debug -2 -streams_num=1 -server_mode=passive -space_token=2310037 file:////scratch/test/1GB srm://uct2-dc1.uchicago.edu:8443/srm/managerv2?SFN=...
done

This transfers a 1GB test file. It was done from 140 IU worker nodes, each with a 1Gb network interface. This kept the incoming 10Gb link at UC completely saturated for >3 hours. We had no failures during this test - dCache services remained stable.

Without passive-mode transfer, there was a bottleneck at the two gridftp doors, which became CPU-bound handling the inbound and outbound traffic to the private-net pools... under these conditions the limiting transfer rate was ~450MB/sec.

  • 10G test:
    graph_image_10G.png

Sustained 200 MB/s Tier 1 - (5x) Tier 2 goal


-- RobertGardner - 08 Jul 2009

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Attachments


png load_test_UC_2009_06_19_bnldcdoors.png (29.5K) | RobertGardner, 08 Jul 2009 - 12:16 | bnl-uc load test
png load_test_UC_2009_06_19_bnlucnetwork.png (19.6K) | RobertGardner, 08 Jul 2009 - 12:16 | bnl uc network
png load_test_UC_2009_06_19_ucswitch.png (30.5K) | RobertGardner, 08 Jul 2009 - 12:17 | uc switch
png graph_image_10G.png (29.6K) | RobertGardner, 08 Jul 2009 - 12:17 | 10G test
 
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