Difference: WebTest (1 vs. 3)

Revision 32011/04/05 - Main.IgorSfiligoi

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META TOPICPARENT name="OSGScal"

Static Web Content test

Revision 22011/04/05 - Main.IgorSfiligoi

Line: 1 to 1
 
META TOPICPARENT name="OSGScal"

Static Web Content test

Line: 41 to 41
 
  • http_1k_cpu.png
  • http_1k_net.png
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Transferring a larger file

For this test, a larger file, of about 10M was being accessed by the clients.

The Web server held very well with about 10Hz to all the way to the max 1k concurrent clients tested.

Concurrency Success Failure Stuck clients
10 25k (10Hz) 0 0
50 25k (11Hz) 0 0
100 25k (11Hz) 0 0
150 25k (11Hz) 0 0
200 26k (11Hz) 0 0
300 25k (11Hz) 0 0
400 26k (11Hz) 0 0
600 26k (11Hz) 0 0
800 26k (11Hz) 1 (0Hz) 0
1000 27k (11Hz) 0 0

This time, the load on the server was higher, but still only using about half of one core. The network was also much more used, but still underutilized at about 70Mbits/s.

  • http_10M_cpu.png
  • http_10M_net.png
 -- IgorSfiligoi - 2011/04/05
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META FILEATTACHMENT attachment="http_1k_cpu.png" attr="" comment="CPU usage for 1k files" date="1302026407" name="http_1k_cpu.png" path="http_1k_cpu.png" size="22163" stream="http_1k_cpu.png" tmpFilename="/tmp/cTZ7X6sUzq" user="IgorSfiligoi" version="1"
META FILEATTACHMENT attachment="http_1k_net.png" attr="" comment="Network usage for 1k files" date="1302026426" name="http_1k_net.png" path="http_1k_net.png" size="29299" stream="http_1k_net.png" tmpFilename="/tmp/7Ind6e1PRA" user="IgorSfiligoi" version="1"
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>
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META FILEATTACHMENT attachment="http_10M_cpu.png" attr="" comment="CPU usage for 10M files" date="1302027203" name="http_10M_cpu.png" path="http_10M_cpu.png" size="31466" stream="http_10M_cpu.png" tmpFilename="/tmp/6Ci8ewzF6l" user="IgorSfiligoi" version="1"
META FILEATTACHMENT attachment="http_10M_net.png" attr="" comment="Network usage for 10M files" date="1302027223" name="http_10M_net.png" path="http_10M_net.png" size="28600" stream="http_10M_net.png" tmpFilename="/tmp/jEHirTuuEz" user="IgorSfiligoi" version="1"

Revision 12011/04/05 - Main.IgorSfiligoi

Line: 1 to 1
Added:
>
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META TOPICPARENT name="OSGScal"

Static Web Content test

A simple scalability test of an Apache Web server, serving static files.

The aim was to establish the behaviour of a simple Web server (like the one used by the gldiein factory) under heavy stress.

Test setup

Server:

  • 2 x Dual Core AMD Opteron(tm) Processor 275
  • 8GB RAM
  • Gigabit Etherent LAN
  • Using Apache 2.2.3 on CentOS? 5.5

Clients:

  • CMS T2 worker nodes @UCSD
  • Accessed via the Grid using the glideTester
  • Using wget for download

Transferring a small file

For this test, a small file of about 1k was being accessed by the clients.

The Web server held very well with about 400Hz to about 1k concurrent clients.After that clients startto see problems.

Concurrency Success Failure Stuck clients
10 569k (237Hz) 0 0
50 720k (300Hz) 0 0
100 1039k (433Hz) 0 0
150 1028k (428Hz) 0 0
200 940k (392Hz) 0 0
300 1049k (437Hz) 0 0
400 1072k (447Hz) 0 0
600 1107k (461Hz) 0 0
800 1161k (484Hz) 0 0
1000 1205k (502Hz) 0 119
1500 671k (280Hz) 19 1251
2000 706k (294Hz) 0 1849

The load on the server is minimal, and the network is underutilized at about 6Mbits/s.

  • http_1k_cpu.png
  • http_1k_net.png

-- IgorSfiligoi - 2011/04/05

META FILEATTACHMENT attachment="http_1k_cpu.png" attr="" comment="CPU usage for 1k files" date="1302026407" name="http_1k_cpu.png" path="http_1k_cpu.png" size="22163" stream="http_1k_cpu.png" tmpFilename="/tmp/cTZ7X6sUzq" user="IgorSfiligoi" version="1"
META FILEATTACHMENT attachment="http_1k_net.png" attr="" comment="Network usage for 1k files" date="1302026426" name="http_1k_net.png" path="http_1k_net.png" size="29299" stream="http_1k_net.png" tmpFilename="/tmp/7Ind6e1PRA" user="IgorSfiligoi" version="1"
 
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