##spark 学习日记 #
##RunTxt ##
读取文件（大小）,查找a个数测试：
local(两核，8G内存，cpu平均70%)
1g
lines:680002,time:3551
a-count:26390,time:41457
2g
lines:1080002,time:3118
a-count:41790,time:67709
10g
lines:5380004,time:7660
a-count:5309760,time:348473
118(8g内存)
1g
lines:680002,time:10673
a-count:26390,time:30533
2g
lines:1080002,time:32131
a-count:41790,time:85542
10g
lines:5380004,time:14378
a-count:5309760,time:204326
2g
lines:680002,time:10604
a-count:26328471,time:11332