apache pig - When not to use Pig Latin -

-

in hadoop definitive guide it's said pig latin doesn't suit data processing task. cites "to perform queries of small amount of data in large set" example.

which other examples bad scenarios of use pig latin?

there may situations when have simple ad-hoc analytical queries data in hdfs. there hive more useful hive queries lot faster write types of queries.

also may refer post pig vs hive vs native map reduce!.


Comments

Post a Comment

Popular posts from this blog

jQuery Mobile app not scrolling in Firefox -

-
i have mobile app built in jquery mobile. scrolling fine in chrome & safari, fails scroll in firefox on desktop. have other instances of same app, different features, , works across browsers. life of me, cannot figure this, please help! located here: http://re-brand.us/dsus/index.html seems bug in firefox: bug log . able scroll using keyboard not trackpad on mac. are using mac? i'll keep looking see if can find way around it.
Read more

c++ - How to add Crypto++ library to Qt project -

-
Image
i downloaded crypto++ source , compiled cryptlib project in visual studio 2013, , added generated .lib file qt project, made .pro file this: qt += core gui qt += sql greaterthan(qt_major_version, 4):qt += widgets target = untitled template = app sources += main.cpp\ mainwindow.cpp headers += mainwindow.h \ databasecontrol.h \ test.h forms += mainwindow.ui win32:config(release, debug|release): libs += -l$$pwd/ -lcryptlib else:win32:config(debug, debug|release): libs += -l$$pwd/ -lcryptlibd else:unix: libs += -l$$pwd/ -lcryptlib includepath += $$pwd/ dependpath += $$pwd/ win32-g++:config(release, debug|release): pre_targetdeps += $$pwd/libcryptlib.a else:win32-g++:config(debug, debug|release): pre_targetdeps += $$pwd/libcryptlibd.a else:win32:!win32-g++:config(release, debug|release): pre_targetdeps += $$pwd/cryptlib.lib else:win32:!win32-g++:config(debug, debug|release): pre_targetdeps += $$pwd/cryptlibd.lib else:unix: pre_targetdeps += $$pw
Read more

php array slice every 2th rule -

-
i have array on php outputs in txt file: printing grid -- 1 values -- undef = -9.99e+08 20.2 \nprinting grid -- 1 values -- undef = -9.99e+08 102.0 \nprinting grid -- 1 values -- undef = -9.99e+08 55.1 \nprinting grid -- 1 values -- undef = -9.99e+08 -18.3 \n what point, need nummeric values @ beginning of each rule. 20.2, 102.0, 55.1, -18,3 etc... example, there can more or less in txt file. now do? have tested array slice function can't exclude rule: printing grid -- 1 values -- undef = -9.99e+08 this array slice code... $arraygood = array_slice($arraybad, 1, 4); and foreach loop create text file: $file = fopen("array.txt","w"); foreach ($arraygood $meting => $waarde) { echo fwrite($file,$waarde . '\n'); } fclose($file); thanks! as posted in comments, understanding have array of strings similar following: $lines = array( "printing grid -- 1 values -- undef = -9.99e+08", "20.2 \nprinting grid --
Read more