Sandia National Laboratories

TEST3

Description:
Each test performed is a file-per-process test where each file is a 2 stripe file (utilizing 2 OST's). In this test OST's are allocated such that one OST per OSS is used up to the maximum amount of OSS's (28). Once the maximum number of OST's is reached the as yet unused OST's on each of the 28 OSS's will be allocated. Once the maximum number of OST's is reached, OST's will be oversubscribed in the original allocation order.

Purpose:
This test will show both how the file-system responds to the case where the number of compute nodes is less than the number of OST's, and how the file-system responds when the number of compute nodes exceeds the number of OST's. 

Performance


AVG PER OST Performance

 

AXES:
Y- MiB/sec aggregate transfer for each datapoint
X - <clients.stripe> increasing client count from 1-76, Constant stripe count of 2.

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 - TEST3

Data in TABLE format

RAW data

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