Sandia National Laboratories

TEST1

Description:
Each test employed a single client writing (and reading) a single file to an increasing number of OST's.  This is a file-per-process test. In this phase the OST's are assigned such that a two stripe file will utilize two OST's each on a separate OSS node. A four stripe file will utilize 4 OST's on four OSS's. (Note: this differs from phase 1 testing due to file-system reconfiguration) Stripe size is limited by lustre to be the minimum of either the number of OST's configured in the file-system or 160 (in this test the number of OST's used were limited to 56 to more meaningfully compare with phase 1 results). 

Purpose:
One purpose of this test is to measure the ability of the client to source or put data. By providing a sink that should exceed the network bandwidth we should be able to determine if the client is a performance bottle-neck.

Performance

Test 1 phase 2 error bar graph

 

AVG PER OST Performance

 


AXES:
Y- MiB/sec aggregate transfer for each datapoint
X - <clients.stripe> constant client count of 1, increasing stripe count from 2-56.

Testing Parameters:
TEST CODE:    IOR
VERSION:    2.8.10
API:    POSIX
ACCESS:    file-per-process
MAX OST's:    56
MAX OSS's:    28

Phase 1 - TEST1

Data in TABLE format

RAW DATA

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