bi in clouds
TRANSCRIPT
![Page 1: BI in Clouds](https://reader033.vdocuments.net/reader033/viewer/2022060117/5587a3ecd8b42a31368b4724/html5/thumbnails/1.jpg)
BI â "îáëàêàõ"
Êóäðÿâöåâ Þðèé, [email protected]
24 àïðåëÿ 2009
Êóäðÿâöåâ Þðèé, [email protected] (ÂÌèÊ ÌÃÓ)BI â "îáëàêàõ" 24 àïðåëÿ 2009 1 / 33
![Page 2: BI in Clouds](https://reader033.vdocuments.net/reader033/viewer/2022060117/5587a3ecd8b42a31368b4724/html5/thumbnails/2.jpg)
Ãîä íàçàä "îáëàêà" áûëè åùå íå ñòîëü ðàñêðó÷åííûì òåðìèíîì
Áûëî ìíîãî "ñèëüíûõ" óòâåðæäåíèé î òîì, êàê èñïîëüçîâàíèåýòîé òåõíîëîãèè èçìåíèò BI
Èíòåðåñíû êàê èñõîäíûå òåíäåíöèè, òàê è òî, ÷òî ïðîèçîøëîçà ãîä
Êóäðÿâöåâ Þðèé, [email protected] (ÂÌèÊ ÌÃÓ)BI â "îáëàêàõ" 24 àïðåëÿ 2009 2 / 33
![Page 3: BI in Clouds](https://reader033.vdocuments.net/reader033/viewer/2022060117/5587a3ecd8b42a31368b4724/html5/thumbnails/3.jpg)
Êëþ÷åâûå ìîìåíòû
1 BI êàê óñëóãà, ïðèìåð Panorama + Google
2 Èñïîëüçîâàíèå "îáëàêà" êàê ïëàòôîðìû äëÿ MPP Õðàíèëèù
3 Map/Reduce è (èëè) MPP ÕÄ?
4 Èñïîëüçîâàíèå MapReduce äëÿ ðàñ÷åòà OLAP-êóáîâ
Êóäðÿâöåâ Þðèé, [email protected] (ÂÌèÊ ÌÃÓ)BI â "îáëàêàõ" 24 àïðåëÿ 2009 3 / 33
![Page 4: BI in Clouds](https://reader033.vdocuments.net/reader033/viewer/2022060117/5587a3ecd8b42a31368b4724/html5/thumbnails/4.jpg)
BI êàê óñëóãà, ïðèìåð Panorama +Google
Êóäðÿâöåâ Þðèé, [email protected] (ÂÌèÊ ÌÃÓ)BI â "îáëàêàõ" 24 àïðåëÿ 2009 4 / 33
![Page 5: BI in Clouds](https://reader033.vdocuments.net/reader033/viewer/2022060117/5587a3ecd8b42a31368b4724/html5/thumbnails/5.jpg)
Î êîìïàíèè Panorama
Èçðàèëüñêàÿ êîìïàíèÿ � îäèí èç ñòàðåéøèõ BI âåíäîðîâ
Êîìàíäà ðàçðàáîò÷èêîâ Microsoft Analysis Services áûëàêóïëåíà èç Panorama
Ïîñëå îáúÿâëåíèÿ î ñîçäàíèè Microsoft PerformancePoint,Panorama îêàçàëàñü â ñëîæíîì ïîëîæåíèè
Êóäðÿâöåâ Þðèé, [email protected] (ÂÌèÊ ÌÃÓ)BI â "îáëàêàõ" 24 àïðåëÿ 2009 5 / 33
![Page 6: BI in Clouds](https://reader033.vdocuments.net/reader033/viewer/2022060117/5587a3ecd8b42a31368b4724/html5/thumbnails/6.jpg)
Panorama Analytics for Google Applications
Äîáàâëåíèå àíàëèòè÷åñêèõ âîçìîæíîñòåé â Google Spreadsheets
Àíàëîã Pivot Tables â Microsoft Excel
Íóæíî ñòðîèòü êóáû, ñ÷èòàòü àãðåãàòû, ðèñîâàòü ãðàôèêè
Äëÿ áûñòðîãî ðàñ÷åòà êóáîâ èñïîëüçóåòñÿ Google App Engine
Åñòü âîçìîæíîñòü èñïîëüçîâàòü Google Docs êàê êëèåíòà ê MsAnalytical Services
http://www.panorama.com/google/
Êóäðÿâöåâ Þðèé, [email protected] (ÂÌèÊ ÌÃÓ)BI â "îáëàêàõ" 24 àïðåëÿ 2009 6 / 33
![Page 7: BI in Clouds](https://reader033.vdocuments.net/reader033/viewer/2022060117/5587a3ecd8b42a31368b4724/html5/thumbnails/7.jpg)
Panorama PowerApps
Ñåðâèñ, ïîçâîëÿþùèé èñïîëüçîâàòü Panorama Analytics âîâíåøíèõ ïðèëîæåíèÿõ/ñàéòàõ
Íàïðèìåð, ãðàôè÷åñêèé àíàëèç íà ñàéòå ó÷åòà ëè÷íûõôèíàíñîâ
Àíàëèòè÷åñêèå êóáû â òàêîì ñëó÷àå ñîáèðàþòñÿ íà "îáëàêå"Google
OLAP êàê ñåðâèñ èëè OLAP 2.0
Êóäðÿâöåâ Þðèé, [email protected] (ÂÌèÊ ÌÃÓ)BI â "îáëàêàõ" 24 àïðåëÿ 2009 7 / 33
![Page 8: BI in Clouds](https://reader033.vdocuments.net/reader033/viewer/2022060117/5587a3ecd8b42a31368b4724/html5/thumbnails/8.jpg)
×òî èçìåíèëîñü çà ãîä?
Èíòåãðàöèÿ â Google Docs óñèëèëàñü, óâåëè÷èâàåòñÿêîëè÷åñòâî ïîëüçîâàòåëåé
Íå âèäíî, ÷òîáû PowerApps øèðîêî èñïîëüçîâàëèñü
Êóäðÿâöåâ Þðèé, [email protected] (ÂÌèÊ ÌÃÓ)BI â "îáëàêàõ" 24 àïðåëÿ 2009 8 / 33
![Page 9: BI in Clouds](https://reader033.vdocuments.net/reader033/viewer/2022060117/5587a3ecd8b42a31368b4724/html5/thumbnails/9.jpg)
Èñïîëüçîâàíèå "îáëàêà" êàêïëàòôîðìû äëÿ MPP Õðàíèëèù
Êóäðÿâöåâ Þðèé, [email protected] (ÂÌèÊ ÌÃÓ)BI â "îáëàêàõ" 24 àïðåëÿ 2009 9 / 33
![Page 10: BI in Clouds](https://reader033.vdocuments.net/reader033/viewer/2022060117/5587a3ecd8b42a31368b4724/html5/thumbnails/10.jpg)
×òî ïðåäîñòàâëÿþò âû÷èñëèòåëüíûå "îáëàêà"?
Âîçìîæíîñòü âçÿòü â àðåíäó ëþáîå êîëè÷åñòâî ñåðâåðîâçàäàííîé êîíôèãóðàöèè
Çàáîòà î ïîääåðæêå ñåðâåðîâ ëîæèòñÿ íà ïðîâàéäåðà "îáëàêà"
Âû ïîëó÷àåòå ip ñåðâåðà è root äîñòóï. Ìîæíî çàëèâàòüãîòîâûå îáðàçû ÎÑ
Äåøåâî )
Êóäðÿâöåâ Þðèé, [email protected] (ÂÌèÊ ÌÃÓ)BI â "îáëàêàõ" 24 àïðåëÿ 2009 10 / 33
![Page 11: BI in Clouds](https://reader033.vdocuments.net/reader033/viewer/2022060117/5587a3ecd8b42a31368b4724/html5/thumbnails/11.jpg)
Çà÷åì ýòî íóæíî äëÿ MPP ÕÄ?
Óäîáñòâî òåñòèðîâàíèÿ òåõíîëîãèè
Ëåãêîå ìàñøòàáèðîâàíèå
Îòñóòñòâèå ïðîáëåì ñ êîíôèãóðàöèåé ñåðâåðîâ
Îñíîâíûå àïîëîãåòû: Vertica, AsterData
Êóäðÿâöåâ Þðèé, [email protected] (ÂÌèÊ ÌÃÓ)BI â "îáëàêàõ" 24 àïðåëÿ 2009 11 / 33
![Page 12: BI in Clouds](https://reader033.vdocuments.net/reader033/viewer/2022060117/5587a3ecd8b42a31368b4724/html5/thumbnails/12.jpg)
Ïðîáëåìû
Áåçîïàñíîñòü äàííûõ
Íàäåæíîñòü ïðîâàéäåðà
Ïåðåíîñ äàííûõ â "îáëàêî"
Êóäðÿâöåâ Þðèé, [email protected] (ÂÌèÊ ÌÃÓ)BI â "îáëàêàõ" 24 àïðåëÿ 2009 12 / 33
![Page 13: BI in Clouds](https://reader033.vdocuments.net/reader033/viewer/2022060117/5587a3ecd8b42a31368b4724/html5/thumbnails/13.jpg)
Áåçîïàñíîñòü, ÷ 1
Çà ýòîò ãîä ïðèäóìàíû âàðèàíòû ðåøåíèÿ: Äîáàâëåíèå ÷àñòèîáëàêà â VPN
http://www.databasecolumn.com/2009/03/securing-your-data-in-the-cloud.html
Êóäðÿâöåâ Þðèé, [email protected] (ÂÌèÊ ÌÃÓ)BI â "îáëàêàõ" 24 àïðåëÿ 2009 13 / 33
![Page 14: BI in Clouds](https://reader033.vdocuments.net/reader033/viewer/2022060117/5587a3ecd8b42a31368b4724/html5/thumbnails/14.jpg)
Áåçîïàñíîñòü, ÷ 2
Øèôðîâàíèå ÷àñòè "âàæíûõ" äàííûõ ïåðåä joinîì
Êóäðÿâöåâ Þðèé, [email protected] (ÂÌèÊ ÌÃÓ)BI â "îáëàêàõ" 24 àïðåëÿ 2009 14 / 33
![Page 15: BI in Clouds](https://reader033.vdocuments.net/reader033/viewer/2022060117/5587a3ecd8b42a31368b4724/html5/thumbnails/15.jpg)
Ïåðåíîñ äàííûõ â îáëàêî
Ñåðâèñû õðàíåíèÿ äàííûõ � îïëàòà çà ãèãàáàéòû äàííûõ,õðàíÿùèõñÿ íà îáëàêå.Ñêîðîñòü èìïîðòà = ñêîðîñòè ñåòåâîãî êàíàëà äî ïðîâàéäåðà.
Êóäðÿâöåâ Þðèé, [email protected] (ÂÌèÊ ÌÃÓ)BI â "îáëàêàõ" 24 àïðåëÿ 2009 15 / 33
![Page 16: BI in Clouds](https://reader033.vdocuments.net/reader033/viewer/2022060117/5587a3ecd8b42a31368b4724/html5/thumbnails/16.jpg)
×òî èçìåíèëîñü çà ãîä?
Óâåëè÷èëîñü êîëè÷åñòâî ïðîâàéäåðîâ "îáëàêîâ": Amazon EC2,AppNexus, GoGrid, Rackspace Cloud
Ó Vertica îêîëî 5òè êëèåíòîâ â "îáëà÷íîì" âàðèàíòå
Êóäðÿâöåâ Þðèé, [email protected] (ÂÌèÊ ÌÃÓ)BI â "îáëàêàõ" 24 àïðåëÿ 2009 16 / 33
![Page 17: BI in Clouds](https://reader033.vdocuments.net/reader033/viewer/2022060117/5587a3ecd8b42a31368b4724/html5/thumbnails/17.jpg)
Map/Reduce è (èëè) MPP ÕÄ?
Êóäðÿâöåâ Þðèé, [email protected] (ÂÌèÊ ÌÃÓ)BI â "îáëàêàõ" 24 àïðåëÿ 2009 17 / 33
![Page 18: BI in Clouds](https://reader033.vdocuments.net/reader033/viewer/2022060117/5587a3ecd8b42a31368b4724/html5/thumbnails/18.jpg)
×òî òàêîå Map Reduce
Map/Reduce � âû÷èñëèòåëüíàÿ ïàðàäèãìà + ïðîãðàììíàÿïëàòôîðìà èñïîëíåíèÿ çàäà÷ íà êëàñòåðå ñåðâåðîâ, ñîçäàííàÿ âêîìïàíèè GoogleÇàäà÷à äåêîìïîçèðóåòñÿ íà 2õ ôàçû � map è reduce (ýêâèâàëåíòíîmap è fold â ôóíêöèîíàëüíûõ ßÏ)
Map-ïðîöåññû çàïóñêàþòñÿ íàä ïîäìíîæåñòâàìè èñõîäíûõäàííûõ è âûïîëíÿþòñÿ àáñîëþòíî íåçàâèñèìî äðóã îò äðóãà.
Reduce-ïðîöåññû îáðàáàòûâàþò ðåçóëüòàòû map-ôàçû,ðàçáèâàÿ èõ ïî çíà÷åíèÿì êëþ÷åé íà íåïåðåñåêàþùèåñÿ áëîêè,÷òî òàêæå ïîçâîëÿåò âûïîëíÿòü èõ íåçàâèñèìî.
Òàêèì îáðàçîì, êàæäàÿ èç ôàç ìîæåò îáðàáàòûâàòüñÿ íàëþáîì êîëè÷åñòâå ñåðâåðîâ ïàðàëëåëüíî.
Open-Source ïðîåêò Map/Reduce ïëàòôîðìû � Apache Hadoop
Êóäðÿâöåâ Þðèé, [email protected] (ÂÌèÊ ÌÃÓ)BI â "îáëàêàõ" 24 àïðåëÿ 2009 18 / 33
![Page 19: BI in Clouds](https://reader033.vdocuments.net/reader033/viewer/2022060117/5587a3ecd8b42a31368b4724/html5/thumbnails/19.jpg)
Ñõåìà Map Reduce
http://labs.google.com/papers/mapreduce.html
Êóäðÿâöåâ Þðèé, [email protected] (ÂÌèÊ ÌÃÓ)BI â "îáëàêàõ" 24 àïðåëÿ 2009 19 / 33
![Page 20: BI in Clouds](https://reader033.vdocuments.net/reader033/viewer/2022060117/5587a3ecd8b42a31368b4724/html5/thumbnails/20.jpg)
Ïðèìåð Map-Reduce, Àëãîðèòì ïîäñ÷åòà ñëîâ â òåêñòå
map � ðàçáèâàåò áëîê ñòðîê íà ñëîâà, äëÿ êàæäîãî ñëîâàãåíåðèðóåò ïàðó (ñëîâî, 1)reduce � äëÿ êàæäîãî ñëîâà, ñêëàäûâàåò ïîëó÷åííûå 1, âû÷èñëÿÿòàêèì îáðàçîì êîëè÷åñòâî ïîâòîðåíèé ñëîâà
Êóäðÿâöåâ Þðèé, [email protected] (ÂÌèÊ ÌÃÓ)BI â "îáëàêàõ" 24 àïðåëÿ 2009 20 / 33
![Page 21: BI in Clouds](https://reader033.vdocuments.net/reader033/viewer/2022060117/5587a3ecd8b42a31368b4724/html5/thumbnails/21.jpg)
Ïî÷åìó âîçíèêëî ïðîòèâîñòîÿíèå M/R è MPP ÕÄ
M/R èñïîëüçóåòñÿ äëÿ ðåøåíèÿ àíàëèòè÷åñêèõ çàäà÷ íàñâåðõáîëüøèõ îáúåìàõ äàííûõ � òà æå îáëàñòü, ÷òî è MPP DWH.2 çàìå÷àòåëüíûõ ïîçèöèè â äèñêóññèè
Map Reduce � ïëàòôîðìà, ÷üå ñóùåñòâîâàíèå îáóñëîâëåíîíåäîñòàòî÷íîé ãðàìîòíîñòüþ ðàçðàáîò÷èêîâ, íå çíàþùèõèñòîðèè ðàçâèòèÿ ïàðàëëåëüíûõ ÑÓÁÄ
Map Reduce � ñðåäñòâî ðàáîòû ñ áîëüøèìè îáúåìàìè,áåñêîíå÷íî ìàñøòàáèðóåìîå è íå èìåþùåå îãðàíè÷åíèÿ â âèäåñõåì è òèïèçàöèè. Çà÷åì íóæíû ÐÑÓÁÄ?
Êóäðÿâöåâ Þðèé, [email protected] (ÂÌèÊ ÌÃÓ)BI â "îáëàêàõ" 24 àïðåëÿ 2009 21 / 33
![Page 22: BI in Clouds](https://reader033.vdocuments.net/reader033/viewer/2022060117/5587a3ecd8b42a31368b4724/html5/thumbnails/22.jpg)
Ñàìûé èçâåñòíûé ïðèìåð Map/Reduce àíàëèòèêè - Hive
Ñîöèàëüíàÿ ñåòü Facebook � äåñÿòêè ìèëëèîíîâ ïîëüçîâàòåëåé
Èñïîëüçóåò Hadoop äëÿ àíàëèçà äàííûõ î ïîëüçîâàòåëÿõ
2,5 Ïåòàáàéòà äàííûõ
 äåíü äîáàâëÿåòñÿ 15 Òá äàííûõ
Òàðãåòèðîâàíèå ðåêëàìû
Àíàëèòè÷åñêèå çàïðîñû
Èíñòðóìåíòàëüíûå ïàíåëè
Text Mining
Íàïèñàíà ñïåöèàëüíàÿ êîìïîíåíòà � Hive, òðàíñôîðìèðóþùàÿSQL çàïðîñ â Map Reduce çàäà÷ó
Hive òåïåðü ÿâëÿåòñÿ îäíèì èç ïîäïðîåêòîâ Hadoop
Êóäðÿâöåâ Þðèé, [email protected] (ÂÌèÊ ÌÃÓ)BI â "îáëàêàõ" 24 àïðåëÿ 2009 22 / 33
![Page 23: BI in Clouds](https://reader033.vdocuments.net/reader033/viewer/2022060117/5587a3ecd8b42a31368b4724/html5/thumbnails/23.jpg)
Ñõåìà ÕÄ Facebook
http://www.slideshare.net/jsensarma/hadoop-hive-talk-at-iitdelhi
Êóäðÿâöåâ Þðèé, [email protected] (ÂÌèÊ ÌÃÓ)BI â "îáëàêàõ" 24 àïðåëÿ 2009 23 / 33
![Page 24: BI in Clouds](https://reader033.vdocuments.net/reader033/viewer/2022060117/5587a3ecd8b42a31368b4724/html5/thumbnails/24.jpg)
Ïî÷åìó Facebook èñïîëüçóåò Hadoop:
Öåíà
Èñïîëüçîâàíèå óæå íàïèñàíîãî êîäà(îáðàáîòêà òåêñòà íàPython) äëÿ ETL
Ìàñøòàáèðóåìîñòü
Ãèáêîñòü ñõåìû õðàíåíèÿ
Âñå ðàâíî íóæåí Oracle RAC äëÿ îíëàéí çàïðîñîâhttp://www.dbms2.com/2009/04/15/cloudera-presents-the-mapreduce-bull-case/
Êóäðÿâöåâ Þðèé, [email protected] (ÂÌèÊ ÌÃÓ)BI â "îáëàêàõ" 24 àïðåëÿ 2009 24 / 33
![Page 25: BI in Clouds](https://reader033.vdocuments.net/reader033/viewer/2022060117/5587a3ecd8b42a31368b4724/html5/thumbnails/25.jpg)
C äðóãîé ñòîðîíû: MPP ÕÄ â Ebay
5 Ïòá äàííûõ â Terradata
10êè òûñÿ÷ ñåðâåðîâ
Ïîñëå òåñòèðîâàíèÿ Hadoop: ìåíüøå çàãðóæàåò ïðîöåññîðà èòðåáóåò áîëüøå ñåðâåðîâ � äîðîæå
Êóäðÿâöåâ Þðèé, [email protected] (ÂÌèÊ ÌÃÓ)BI â "îáëàêàõ" 24 àïðåëÿ 2009 25 / 33
![Page 26: BI in Clouds](https://reader033.vdocuments.net/reader033/viewer/2022060117/5587a3ecd8b42a31368b4724/html5/thumbnails/26.jpg)
Êîãäà ñòîèò èñïîëüçîâàòü MPP ÕÄ èëè Map/Reduce
Ñòàòüÿ Ñòîóíáðåéêåðà ñîòîâàðèùè:A comparison of approaches to large-scale data analysis: MapReduce vsDBMS Benchmarkshttp://database.cs.brown.edu/sigmod09/Ñðàâíåíèå Hadoop, DBMS X (ïîñòðî÷íîå MPP ÕÄ) è Vertica(ïîêîëîíî÷íîå MPP ÕÄ) íà ðÿäå òèïè÷íûõ çàäà÷:
Ïîèñê çíà÷åíèÿ ïî òåêñòîâîé ìàñêå
Ðàñ÷åò àãðåãàòà
Ñëîæíàÿ UDF, ïîäñ÷åò êîëè÷åñòâà âíóòðåííèõ ññûëîê âíàáîðå HTML ñòðàíèö
Êóäðÿâöåâ Þðèé, [email protected] (ÂÌèÊ ÌÃÓ)BI â "îáëàêàõ" 24 àïðåëÿ 2009 26 / 33
![Page 27: BI in Clouds](https://reader033.vdocuments.net/reader033/viewer/2022060117/5587a3ecd8b42a31368b4724/html5/thumbnails/27.jpg)
Âûâîäû òåñòèðîâàíèÿ:
Çàãðóçêà äàííûõ â Hadoop áûñòðåå âñåãî
Ïîèñê è àãðåãàöèÿ � áûñòðåå â DBMS X è êëàñòåðå
UDF áûñòðåå â Hadoop
Vertica áûñòðåå âñåõ íà 100 óçëîâîì êëàñòåðå )
Êóäðÿâöåâ Þðèé, [email protected] (ÂÌèÊ ÌÃÓ)BI â "îáëàêàõ" 24 àïðåëÿ 2009 27 / 33
![Page 28: BI in Clouds](https://reader033.vdocuments.net/reader033/viewer/2022060117/5587a3ecd8b42a31368b4724/html5/thumbnails/28.jpg)
Map/Reduce êàê ñðåäñòâî ðàñøèðåíèÿ MPP ÕÄ
SQL/MR â ÕÄ Aster Data � ñîâìåùåíèå SQL è Map/Reduce âçàïðîñàõ ê õðàíèëèùó×àñòü çàäà÷ â SQL, ÷àñòü íà óäîáíîì ÿçûêå ïðîãðàììèðîâàíèÿ âMRhttp://www.asterdata.com/blog/index.php/2009/04/02/enterprise-class-mapreduce/
Êóäðÿâöåâ Þðèé, [email protected] (ÂÌèÊ ÌÃÓ)BI â "îáëàêàõ" 24 àïðåëÿ 2009 28 / 33
![Page 29: BI in Clouds](https://reader033.vdocuments.net/reader033/viewer/2022060117/5587a3ecd8b42a31368b4724/html5/thumbnails/29.jpg)
Ïðèìåð èñïîëüçîâàíèÿ M/R äëÿàíàëèòèêè. Ñîçäàíèå OLAP êóáîâ
Êóäðÿâöåâ Þðèé, [email protected] (ÂÌèÊ ÌÃÓ)BI â "îáëàêàõ" 24 àïðåëÿ 2009 29 / 33
![Page 30: BI in Clouds](https://reader033.vdocuments.net/reader033/viewer/2022060117/5587a3ecd8b42a31368b4724/html5/thumbnails/30.jpg)
Ïðèìåð èñïîëüçîâàíèÿ M/R äëÿ àíàëèòèêè. Ñîçäàíèå OLAP êóáîâ
Êóäðÿâöåâ Þðèé, [email protected] (ÂÌèÊ ÌÃÓ)BI â "îáëàêàõ" 24 àïðåëÿ 2009 30 / 33
![Page 31: BI in Clouds](https://reader033.vdocuments.net/reader033/viewer/2022060117/5587a3ecd8b42a31368b4724/html5/thumbnails/31.jpg)
Ïðèìåð èñïîëüçîâàíèÿ M/R äëÿ àíàëèòèêè.Ñõåìà îòâåòîâ íàçàïðîñû
Êóäðÿâöåâ Þðèé, [email protected] (ÂÌèÊ ÌÃÓ)BI â "îáëàêàõ" 24 àïðåëÿ 2009 31 / 33
![Page 32: BI in Clouds](https://reader033.vdocuments.net/reader033/viewer/2022060117/5587a3ecd8b42a31368b4724/html5/thumbnails/32.jpg)
Íå âàæíî, êàêîé OLAP-ñåðâåð èñïîëüçîâàòü
Ñêîðîñòü ïîñòðîåíèÿ êóáîâ ðàñòåò ëèíåéíî ñ óìåíüøåíèåìîáúåìà äàííûõ íà óçëå
Ñëîæíàÿ çàäà÷à ñîçäàíèÿ OLAP-êóáà ëåãêî ïåðåïèñûâàåòñÿ âMR
Êóäðÿâöåâ Þðèé, [email protected] (ÂÌèÊ ÌÃÓ)BI â "îáëàêàõ" 24 àïðåëÿ 2009 32 / 33