cascade-snapshots

Test the effect of taking multiple cascaded snapshots on disk write performance. A 4G file is created between each snapshot.

HTML result view exported from: https://openbenchmarking.org/result/1806121-AR-CASCADESN43.

cascade-snapshotsProcessorMotherboardChipsetMemoryDiskGraphicsNetworkOSKernelOpenGLCompilerFile-SystemScreen ResolutionSystem LayerBefore SnapshotsAfter 1st snapshotAfter 2nd snapshotIntel Xeon E5-2660 v3 @ 2.59GHz (1 Core)Intel 440BX (6.00 BIOS)Intel 440BX/ZX/DX4096MB59GB Virtual diskllvmpipe 3968MBIntel 82545EM GigabitUbuntu 18.044.15.0-22-generic (x86_64)3.0 Mesa 18.0.0-rc5 (LLVM 6.0 256 bits)GCC 7.3.0ext41176x885VMwareOpenBenchmarking.orgCompiler Details- --build=x86_64-linux-gnu --disable-vtable-verify --disable-werror --enable-checking=release --enable-clocale=gnu --enable-default-pie --enable-gnu-unique-object --enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++ --enable-libmpx --enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-multiarch --enable-multilib --enable-nls --enable-objc-gc=auto --enable-offload-targets=nvptx-none --enable-plugin --enable-shared --enable-threads=posix --host=x86_64-linux-gnu --program-prefix=x86_64-linux-gnu- --target=x86_64-linux-gnu --with-abi=m64 --with-arch-32=i686 --with-as=/usr/bin/x86_64-linux-gnu-as --with-default-libstdcxx-abi=new --with-gcc-major-version-only --with-ld=/usr/bin/x86_64-linux-gnu-ld --with-multilib-list=m32,m64,mx32 --with-target-system-zlib --with-tune=generic --without-cuda-driver -v Disk Details- CFQ / data=ordered,relatime,rwSecurity Details- KPTI + __user pointer sanitization + Full generic retpoline Protection

cascade-snapshotsaio-stress: Rand WriteDifferenceStandard ErrorStandard DeviationBefore SnapshotsAfter 1st snapshotAfter 2nd snapshot510.351.98x14.206.81%257.921.00x36.8234.96%342.211.33x6.514.66%OpenBenchmarking.org

AIO-Stress

Test: Random Write

OpenBenchmarking.orgMB/s, More Is BetterAIO-Stress 0.21Test: Random WriteBefore SnapshotsAfter 1st snapshotAfter 2nd snapshot110220330440550SE +/- 14.20, N = 6SE +/- 36.82, N = 6SE +/- 6.51, N = 6510.35257.92342.211. (CC) gcc options: -pthread -laio

Phoronix Test Suite v10.8.4