Sandia National Laboratories

TEST3
(Phase 1)

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 both OST's are allocated in order on a single OSS. Each file is written using 2 OST's from the same OSS. Once the maximum number of OST's is reached, OST's will be oversubscribed in the same order as initially allocated.

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 1-86, 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

Data in TABLE format

RAW data

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