in 36:55, I am confused. Select * from A where A.value > 99; You first step1 is bring table A from disk to memory then do the filter operation. I don't think parallelism here.
Because it is the same. This terminology comes from the early distributed databases from the 1980s + 1990s, well *before* Spark was invented. See these papers: dl.acm.org/citation.cfm?id=1559865 people.eecs.berkeley.edu/~brewer/cs262/5-dewittgray92.pdf
Teradata is massively parallel processing database. Any specific reason for not mentioning Teradata anywhere in your classes? I dint see even a single instance so far as such.
Some of his questions are really stupid. His classmates all have well functioning brain and they don't ask so many stupid questions every single class.
in 36:55, I am confused. Select * from A where A.value > 99; You first step1 is bring table A from disk to memory then do the filter operation. I don't think parallelism here.
Finally, I can hear hit it again.
We can have Coroutine per DBMS Worker I guess.
For distributed systems, the query planning is usually the same?
the gather, repartition and distribute looks like map and shuffle from spark
Because it is the same. This terminology comes from the early distributed databases from the 1980s + 1990s, well *before* Spark was invented. See these papers:
dl.acm.org/citation.cfm?id=1559865
people.eecs.berkeley.edu/~brewer/cs262/5-dewittgray92.pdf
I hope they did well on the exam.
'coroutine' tech should be mentioned in this part?
Teradata is massively parallel processing database. Any specific reason for not mentioning Teradata anywhere in your classes? I dint see even a single instance so far as such.
lol.. he mentions it in next lecture.. around 3:20 ruclips.net/video/28hSVkOs6x8/видео.html
Why that guy has so many questions????
Why not!?
because he has a fully functioning brain
Some of his questions are really stupid. His classmates all have well functioning brain and they don't ask so many stupid questions every single class.
就你个中国人事儿多，偷学老外课程，话还贼多