Interested to Buy Any Domain ? << Click Here >> for more details...
HOw Hash Partion Works
Thank you in Advance
i have doubts on Hash Partion TEch Could please give me the
clear understandable notation
example
e_id,dept_no
1,10
2,10
3,20
4,20
5,30
6,40
i have TWo Nodes/Three Nodes
My questions are:
1).if i select hash key as e_id how Hash partion will
distribute the data in to two NOdes/three NOdes
2).if i select hash key as dept_no how Hash partion will
distribute the data in to two NOdes/three NOdes
sivakumar.katta7@gmail.com
- 5 Answers
- 11169 Views
- FIS, I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
Well The basic idea is:
Same key column values are given to the same node.
Hence
1.(e_id)
node1 node2 node1 node2 node3
1,10 2,10 1,10 2,10 3,20
3,20 4,20 4,20 5,30 6,40
5,30 6,40
2. (dept_no)
node1 node2 node1 node2 node3
1,10 3,20 1,10 3,20 5,30
2,10 4,20 2,10 4,20 6,40
5,30 6,40
(This is where pranay went wrong 6,40 will go to node3
instead of node1.)
| Is This Answer Correct ? | 1 Yes | 0 No |
Consider you r having two nodes node 1 and node and u
selected e_id as hash key then
for two nodes for three nodes
node 1 node 2 node 1 node 2 node 3
1,10 2,10 1,10 2,10 3,20
3,20 4,20 4,20 5,30 6,40
5,30 6,40
if u selected dept_no as hash id then
for two node for three node
node 1 node 2 node1 node2 node3
1,10 3,20 1,10 3,20 5,30
2,10 4,20 2,10 4,20
5,30 6,40 6,40
| Is This Answer Correct ? | 6 Yes | 6 No |
i don't know y some one ticked my ans as wrong, please give me explanation, n correct ans if i'm not correct. don't tick blindly as no.
Harikrishna, ur ans is correct if it is 4 node configuration and dept_no is key column, read the question properly he asked (1) 2 or 3 node and key column as e_id
(2) 2 or 3 node and key column is dept_id
| Is This Answer Correct ? | 0 Yes | 0 No |
Hi Pranay,
Sorry I got confused with your answer thats Y i messed it up
| Is This Answer Correct ? | 0 Yes | 0 No |
If U make Dept_no as Key Then data will be as below:
node 1 node2 node3 node4
1,10 3,20 5,30 6,40
2,10 4,20
| Is This Answer Correct ? | 0 Yes | 1 No |
I have source file which contains duplicate data,my requirement is unique data should pass to one file and duplicate data should pass another file how?
How the ipc stage work?
whom do you report?
How one source columns or rows to be loaded in to two different tables?
Is possible to create skid in dim,fact tables?
How will you move hashed file from one location to another location?
In merge stage can we update the values?
What are the types of views in datastage director?
What are orabulk and bcp stages?
in job of 30 one job is very slow due to this entire job is very slow how can u know which job is slow?
What is RCP?
Which is the best institute in Hyderabad to learn OBIEE and DataStage?Please tell me faculty name also
Teradata 
