45 lines
1.8 KiB
Plaintext
45 lines
1.8 KiB
Plaintext
INTRODUCTION:
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=============
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This patch integrates the Flexible Filesystem Benchmark (FFSB) with
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the autotest. This integration enables the high-performace I/O load testing in the
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KVM Virtual machine environment.
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FFSB is a filesystem performance measurement tool. It is a multi-threaded
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application (using pthreads), written entirely in C with cross-platform
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portability in mind. It differs from other filesystem benchmarks in that
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the user may supply a profile to create custom workloads, while most other
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filesystem benchmarks use a fixed set of randomly generated workloads.
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More information about the FFSB can be got from reading the README in the
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FFSB source directory which can be accessed from this link:
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[http://sourceforge.net/projects/ffsb/]
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With this integration, it is now possible to test a variety of filesystems on
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the KVM guest for :
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(1) directed I/O with sequential/random read/write.
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(2) buffered I/O with sequential/random read/write.
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(3) use varying block alignment boundaries to measure filesystem behaviour.
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(4) use multithreaded workloads to stress the filesystem.
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(5) Exert weighted combination of I/O workloads to analyze the I/O performace
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for a specific scenario.
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(6) Age filesystem according to a specified workload upto a specified limit.
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Since the only interface used for the integration is a FFSB configuration file;
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Autotest will be able to run variety of I/O tests on guest as FFSB improves,
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with no or minimal code change in Autotest itself.
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USE:
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====
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To use the FFSB for Filesystem testing, two configuration files
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need to be modified -
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(1) Usual - tests.cfg file to activate the ffsb tests through KVM.
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(2) profile.cfg - where the workloads are specified.
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TODO:
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====
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* Add validations for max. number of threads according to number of
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vcpus exported by QEMU-KVM
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* Test Autotest/ffsb
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* Test FFSB itself.
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