Hello,
The following shows a comparison between inter server-side copy and a traditional copy.
Setup:
Client: 16 CPUs, 32GB
SRC server: 4 CPUs, 8GB
DST server: 4 CPUs, 8GB
All machines are running 4.10.0-ssc-02242017.1345,
4.10.0 kernel on top RHEL 7.3 with Olga’s SSC patches 02242017.tgz (asynchronous SSC)
Test:
The test runs 10 times for each copy size and the average is compared.
The servers are mounted and un-mounted for each copy (using default mount options)
Testing copy size: 1KB – 4GB, NOTE: the last copy is 4GB-1 bytes, the maximum copy_file_range() accepts.
Results:
For a copy size below 16MB, traditional copy runs faster than server-side copy
For a copy size of 32MB and above, server-side copy is at least 30% faster.
For a copy size of 128MB and above, server-side copy is about 50% faster.
For the 1GB and 2GB copy sizes, the performance improvement is only about 30-40%, investigating why this is happening.
*** Inter-SSC performance test
TEST: Running test 'perf02'
Performance degradation:
INFO: 00:08:50.035165 - perf02 copy with size 1KB
INFO: 00:09:01.302004 - Server-side COPY: 0.104049992561 seconds
INFO: 00:09:01.302206 - Traditional COPY: 0.0319610118866 seconds
FAIL: SSC should outperform traditional copy, performance degradation for a 1KB file: 225%
INFO: 00:09:01.302378 - perf02 copy with size 2KB
INFO: 00:09:12.332144 - Server-side COPY: 0.0923588514328 seconds
INFO: 00:09:12.332335 - Traditional COPY: 0.033596777916 seconds
FAIL: SSC should outperform traditional copy, performance degradation for a 2KB file: 174%
INFO: 00:09:12.332510 - perf02 copy with size 4KB
INFO: 00:09:23.320714 - Server-side COPY: 0.100715565681 seconds
INFO: 00:09:23.320915 - Traditional COPY: 0.0336240530014 seconds
FAIL: SSC should outperform traditional copy, performance degradation for a 4KB file: 199%
INFO: 00:09:23.321086 - perf02 copy with size 8KB
INFO: 00:09:34.542515 - Server-side COPY: 0.0881641149521 seconds
INFO: 00:09:34.542742 - Traditional COPY: 0.0336608886719 seconds
FAIL: SSC should outperform traditional copy, performance degradation for a 8KB file: 161%
INFO: 00:09:34.542924 - perf02 copy with size 16KB
INFO: 00:09:45.439424 - Server-side COPY: 0.0939898014069 seconds
INFO: 00:09:45.439630 - Traditional COPY: 0.0277063846588 seconds
FAIL: SSC should outperform traditional copy, performance degradation for a 16KB file: 239%
INFO: 00:09:45.439795 - perf02 copy with size 32KB
INFO: 00:09:56.103480 - Server-side COPY: 0.0798309087753 seconds
INFO: 00:09:56.103691 - Traditional COPY: 0.0335722208023 seconds
FAIL: SSC should outperform traditional copy, performance degradation for a 32KB file: 137%
INFO: 00:09:56.103848 - perf02 copy with size 64KB
INFO: 00:10:07.217026 - Server-side COPY: 0.106491327286 seconds
INFO: 00:10:07.217228 - Traditional COPY: 0.034387588501 seconds
FAIL: SSC should outperform traditional copy, performance degradation for a 64KB file: 209%
INFO: 00:10:07.217400 - perf02 copy with size 128KB
INFO: 00:10:18.022320 - Server-side COPY: 0.105627346039 seconds
INFO: 00:10:18.022516 - Traditional COPY: 0.0511318922043 seconds
FAIL: SSC should outperform traditional copy, performance degradation for a 128KB file: 106%
INFO: 00:10:18.022686 - perf02 copy with size 256KB
INFO: 00:10:29.452353 - Server-side COPY: 0.124787020683 seconds
INFO: 00:10:29.452538 - Traditional COPY: 0.0552408218384 seconds
FAIL: SSC should outperform traditional copy, performance degradation for a 256KB file: 125%
INFO: 00:10:29.452713 - perf02 copy with size 512KB
INFO: 00:10:41.357315 - Server-side COPY: 0.110602092743 seconds
INFO: 00:10:41.357489 - Traditional COPY: 0.0643961668015 seconds
FAIL: SSC should outperform traditional copy, performance degradation for a 512KB file: 71%
INFO: 00:10:41.357656 - perf02 copy with size 1MB
INFO: 00:10:52.704159 - Server-side COPY: 0.118950200081 seconds
INFO: 00:10:52.704341 - Traditional COPY: 0.0703304767609 seconds
FAIL: SSC should outperform traditional copy, performance degradation for a 1MB file: 69%
INFO: 00:10:52.704499 - perf02 copy with size 2MB
INFO: 00:11:05.367265 - Server-side COPY: 0.13633646965 seconds
INFO: 00:11:05.367451 - Traditional COPY: 0.103643512726 seconds
FAIL: SSC should outperform traditional copy, performance degradation for a 2MB file: 31%
INFO: 00:11:05.367614 - perf02 copy with size 4MB
INFO: 00:11:18.872004 - Server-side COPY: 0.181165075302 seconds
INFO: 00:11:18.872204 - Traditional COPY: 0.164586114883 seconds
FAIL: SSC should outperform traditional copy, performance degradation for a 4MB file: 10%
INFO: 00:11:18.872368 - perf02 copy with size 8MB
INFO: 00:11:35.093071 - Server-side COPY: 0.29020409584 seconds
INFO: 00:11:35.093297 - Traditional COPY: 0.283315181732 seconds
FAIL: SSC should outperform traditional copy, performance degradation for a 8MB file: 2%
Performance gain:
INFO: 00:11:35.093446 - perf02 copy with size 16MB
INFO: 00:11:54.779844 - Server-side COPY: 0.455569577217 seconds
INFO: 00:11:54.780038 - Traditional COPY: 0.506252598763 seconds
PASS: SSC should outperform traditional copy, performance improvement for a 16MB file: 11%
INFO: 00:11:54.780185 - perf02 copy with size 32MB
INFO: 00:12:22.415131 - Server-side COPY: 0.71369125843 seconds
INFO: 00:12:22.415319 - Traditional COPY: 0.93473637104 seconds
PASS: SSC should outperform traditional copy, performance improvement for a 32MB file: 30%
INFO: 00:12:22.415466 - perf02 copy with size 64MB
INFO: 00:13:03.498260 - Server-side COPY: 1.23845338821 seconds
INFO: 00:13:03.498456 - Traditional COPY: 1.73098192215 seconds
PASS: SSC should outperform traditional copy, performance improvement for a 64MB file: 39%
INFO: 00:13:03.498637 - perf02 copy with size 128MB
INFO: 00:14:11.502475 - Server-side COPY: 2.22639911175 seconds
INFO: 00:14:11.502896 - Traditional COPY: 3.34778087139 seconds
PASS: SSC should outperform traditional copy, performance improvement for a 128MB file: 50%
INFO: 00:14:11.503102 - perf02 copy with size 256MB
INFO: 00:16:12.323350 - Server-side COPY: 4.29401872158 seconds
INFO: 00:16:12.323537 - Traditional COPY: 6.54622249603 seconds
PASS: SSC should outperform traditional copy, performance improvement for a 256MB file: 52%
INFO: 00:16:12.323703 - perf02 copy with size 512MB
INFO: 00:19:58.311598 - Server-side COPY: 8.3841770649 seconds
INFO: 00:19:58.311793 - Traditional COPY: 12.9200412273 seconds
PASS: SSC should outperform traditional copy, performance improvement for a 512MB file: 54%
INFO: 00:19:58.311935 - perf02 copy with size 1GB
INFO: 00:26:01.275809 - Server-side COPY: 14.5967838049 seconds
INFO: 00:26:01.276020 - Traditional COPY: 20.1957453728 seconds
PASS: SSC should outperform traditional copy, performance improvement for a 1GB file: 38%
INFO: 00:26:01.276175 - perf02 copy with size 2GB
INFO: 00:35:29.990220 - Server-side COPY: 23.606795764 seconds
INFO: 00:35:29.990432 - Traditional COPY: 31.4261539459 seconds
PASS: SSC should outperform traditional copy, performance improvement for a 2GB file: 33%
INFO: 00:35:29.990580 - perf02 copy with size 4GB
INFO: 00:53:17.198827 - Server-side COPY: 41.2261408091 seconds
INFO: 00:53:17.199033 - Traditional COPY: 62.9210350513 seconds
PASS: SSC should outperform traditional copy, performance improvement for a 4GB file: 52%
TIME: 44m27.164286s
Logfile: /home/mora/logs/nfstest_ssc_20170412000849.log
23 tests (9 passed, 14 failed)
Total time: 44m28.334177s
--Jorge
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