MySQL新技术探索与实践

Editor's Notes

• #6: #include <iostream> #include <cstdlib> #include <time.h> #include <math.h> #define MAXN 2000000000 using namespace std; //计时器 class Timer { public : //构造函数 Timer (); //析构函数 ~Timer (); //开始计时 void begin(); //计时结束 void end(); //获取时间 float get_time(); private : clock_t start, finish; float time; }; Timer::Timer () { start = 0; finish = 0; } Timer::~Timer () { start = 0; finish = 0; } void Timer::begin () { start = clock(); } void Timer::end () { finish = clock(); } float Timer::get_time() { time = (float)(finish-start)/CLOCKS_PER_SEC; return time; } float pi(int n) { float s=0; float a; for(int i=1;i<=n;++i) { if(i%2==0) { a = 1.0/(2*i-1); s -= a; } else { a = 1.0/(2*i-1); s += a; } } s *= 4; return s; }; float sqrt1 (int n) { float a = 0; for (int i=1; i<=n; ++i) { /*if (i%2 == 0) { a += 1/sqrt(i); } else { a -= 1/sqrt(i); }*/ a += 1/sqrt(i); } return a; } float sqrt2 (float x) { float xhalf = 0.5f*x; int i = *(int*)&x; // get bits for floating VALUE i = 0x5f375a86- (i>>1); // gives initial guess y0 x = *(float*)&i; // convert bits BACK to float x = x*(1.5f-xhalf*x*x); // Newton step, repeating increases accuracy return x; } float sqrt3 (int n) { float a = 0; for (int i=1; i<=n; ++i) { /*if (i%2 == 0) { a += sqrt2((float)i); } else { a -= sqrt2((float)i); }*/ a += sqrt2((float)i); } return a; } int main() { Timer timer; timer.begin (); float p = pi(MAXN); timer.end (); cout<<"1.PI Test(NULL):"<<timer.get_time()<<endl; timer.begin (); cout<<"\n2.PI="<<pi(MAXN)<<endl; timer.end (); cout<<"2.PI Test:"<<timer.get_time()<<endl; timer.begin (); sqrt1(MAXN); timer.end (); cout<<"\n3.system sqrt Test(NULL):"<<timer.get_time()<<endl; timer.begin (); cout<<"\n4.sqrt1="<<sqrt1(MAXN)<<endl; timer.end (); cout<<"4.system sqrt Test:"<<timer.get_time()<<endl; timer.begin (); float s = sqrt3(MAXN); timer.end (); cout<<"\n5.newton sqrt Test(NULL):"<<timer.get_time()<<endl; timer.begin (); cout<<"\n6.sqrt2="<<sqrt3(MAXN)<<endl; timer.end (); cout<<"6.newton sqrt Test:"<<timer.get_time()<<endl; return 0; }
• #7: GCC编译参数：CC=gcc \ CXX=gcc \ CHOST="x86_64-pc-linux-gnu" \ CFLAGS=" -O3 \ -fomit-frame-pointer \ -pipe \ -march=nocona \ -mfpmath=sse \ -m128bit-long-double \ -mmmx \ -msse \ -msse2 \ -maccumulate-outgoing-args \ -m64 \ -ftree-loop-linear \ -fprefetch-loop-arrays \ -freg-struct-return \ -fgcse-sm \ -fgcse-las \ -frename-registers \ -fforce-addr \ -fivopts \ -ftree-vectorize \ -ftracer \ -frename-registers \ -minline-all-stringops \ -fno-exceptions \ -fno-rtti \ -fbranch-target-load-optimize2 \ -fno-builtin-malloc -fno-builtin-calloc -fno-builtin-realloc -fno-builtin-free " \ CXXFLAGS="${CFLAGS}" \ LDFLAGS=" -ltcmalloc_minimal -lstdc++ " \ ./configure \ --with-server-suffix=-alibaba-edition \ --with-mysqld-user=mysql \ --with-plugins=heap,innodb_plugin,myisam,partition \ --with-charset=utf8 \ --with-collation=utf8_general_ci \ --with-extra-charsets=gbk,utf8,ascii \ --with-big-tables \ --with-fast-mutexes \ --with-zlib-dir=bundled \ --with-readline \ --with-pthread \ --enable-assembler \ --enable-profiling \ --enable-local-infile \ --enable-thread-safe-client \ --with-mysqld-ldflags=-all-static \ --without-embedded-server \ --without-query-cache \ --without-geometry \ --without-debug \ --without-ndb-binlog \ --without-ndb-debug ICC参数： CC=icc \ CXX=icpc \ LD=xild \ AR=xiar \ CFLAGS="-O3 -fno-builtin-malloc -fno-builtin-calloc -fno-builtin-realloc -fno-builtin-free -unroll2 -ip -fp-model fast=1 -restrict -fno-exceptions -fno-rtti -no-prec-div -fno-implicit-templates -static-intel -static-libgcc -static -xSSE2 -axSSE2 " \ CXXFLAGS="${CFLAGS}" \ CPPFLAGS=" -I/usr/alibaba/icc/include " \ LDFLAGS=" -L/usr/alibaba/icc/lib/intel64/ -lrt -ltcmalloc_minimal -lstdc++ " \ ./configure \ --with-server-suffix=-alibaba-edition \ --with-mysqld-user=mysql \ --with-plugins=heap,innodb_plugin,myisam,partition \ --with-charset=utf8 \ --with-collation=utf8_general_ci \ --with-extra-charsets=gbk,utf8,ascii \ --with-big-tables \ --with-fast-mutexes \ --with-zlib-dir=bundled \ --with-readline \ --with-pthread \ --enable-assembler \ --enable-profiling \ --enable-local-infile \ --enable-thread-safe-client \ --with-mysqld-ldflags=-all-static \ --without-embedded-server \ --without-query-cache \ --without-geometry \ --without-debug \ --without-ndb-binlog \ --without-ndb-debug
• #11: 格式化参数： mkfs.xfs -f -i size=512,attr=2 -l size=128m,lazy-count=1 -d su=64k,sw=5 -L data /dev/sdb1 mount参数： /dev/sdb1 /data xfs defaults,noatime,nodiratime,noikeep,nobarrier,allocsize=8M,attr2,largeio,inode64,swalloc 0 0
• #20: 测试场景为1G数据不断执行SELECT或GET操作同一条记录