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avik
New User
Joined: 13 May 2008
Posts: 16
Location: kolkata
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We're using Connect:Direct (NDM) for data transfer between different LPARs. A lot of CPU consumption happens for NDM processes. So I have searched a lot regarding tuning options of Connect:Direct. But didn't get much about it.
I know Connect:Direct is already a tuned proccess. So are there any other suggestions for tuning Connect:Direct? |
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dick scherrer
Moderator Emeritus
Joined: 23 Nov 2006
Posts: 19244
Location: Inside the Matrix
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Hello,
File transfers usually do not consume excessive cpu.
Does this process use compression? |
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superk
Global Moderator
Joined: 26 Apr 2004
Posts: 4652
Location: Raleigh, NC, USA
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avik
New User
Joined: 13 May 2008
Posts: 16
Location: kolkata
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Is there any guidelines for getting optimal performance for NDM in z/os?
Example-what should be the "VEL" or "IMP" parameters? |
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avik
New User
Joined: 13 May 2008
Posts: 16
Location: kolkata
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Hi all,
In proclib of NDM I found out many procs containing "Compression" on.So the jobname in my JCLlib having those procs are using "Compression on" while running.
Can anyone help me out that how to make the compression outside NDM & then sending the data through it. 
If I am compressing data outside NDm through any job(JCL) the is that going to give me benefit or not?
Also how to check for "velocity" & region size" & other parameters for NDM??? |
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enrico-sorichetti
Superior Member
Joined: 14 Mar 2007
Posts: 10873
Location: italy
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| Quote: |
| If I am compressing data outside NDm through any job(JCL) the is that going to give me benefit or not? |
compression and decompression are CPU intensive processes,
so it is irrelevant at what stage You perform it, CPU consumption will be there |
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dick scherrer
Moderator Emeritus
Joined: 23 Nov 2006
Posts: 19244
Location: Inside the Matrix
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Hello,
| Quote: |
compression and decompression are CPU intensive processes,
. . ., CPU consumption will be there |
Depending on which compression tool you use and the content of the data to be compressed, one may use a bit more or less than the other. To find out, run some tests.
As Enrico mentioned, compression is CPU intensive, so someone will need to decide if it is preferable to use more CPU or transmit a larger volume. |
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