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тАО02-26-2009 01:05 PM
тАО02-26-2009 01:05 PM
My boss asked me a question about data transfer from one HP-UX server to another HP-UX server, which way (speed/rate)is faster? Using NFS remote mount point "local" copy or SFTP from one to another? How about FTP?
Thanks a lot. Any answers will be very appreciate.
-G
Solved! Go to Solution.
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тАО02-26-2009 01:17 PM
тАО02-26-2009 01:17 PM
SolutionWould they be over the same network interface? Here I can sneak a few sftp's over the gigabit backup network in the day time, but they would never allow an NFS mount over it.
What size files?
How many files?
How often?
FTP is generally frowned up on as being less secure. However if you are inside of your firewalls, and the data is not too sensitive then its an option.
Mark
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тАО02-26-2009 01:25 PM
тАО02-26-2009 01:25 PM
Re: NFS vs. SFTP which one faster?
Thanks a lot for your faster reply, through NFS or SFTP? Just a kidding.
The total size around 100-150GB. It's a daily job. How many files? not sure, just know it's some oracle data files.
NIC are all std 100MB mode, they are all located inside firewall internal environment.
Which one is faster?
-G
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тАО02-26-2009 01:30 PM
тАО02-26-2009 01:30 PM
Re: NFS vs. SFTP which one faster?
sftp will have lower overhead and therefor be quicker. Also the fact that it is a daily job, means there is no need for a permanent NFS connection.
One other idea for large files is tar to std out and remsh to the remote host:
tar cvf - filename | remsh hostname "cd /dir ; tar xvf -"
Good luck, other users might be able to make other suggestions.
Mark
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тАО02-26-2009 01:33 PM
тАО02-26-2009 01:33 PM
Re: NFS vs. SFTP which one faster?
Have a good day.
-Gary
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тАО02-26-2009 04:30 PM
тАО02-26-2009 04:30 PM
Re: NFS vs. SFTP which one faster?
Dave
[Any personal opinions expressed are mine, and not official statements on behalf of Hewlett Packard Enterprise]
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тАО02-26-2009 04:35 PM
тАО02-26-2009 04:35 PM
Re: NFS vs. SFTP which one faster?
The answer is, of course "it depends" :)
Ignoring disc performance on the premis it affects both equally (assuming NFS read rather than write)...
NFS performance will depend on the size of the effective TCP windows and the number of outstanding NFS requests per mount and the number of TCP connections per mount. How those are changed will have to come from the likes of Dave Olker or another NFS guru.
FTP of a single file will depend on the size of the effective TCP window. FTP will otherwise shove as much into the socket at one time as it can. Socket buffer settings are controlled in ftp on ux via (iirc) a -B option - and IIRC FTP will always make explicit setsockopt() calls and not rely on the the system defaults so you need to check the ftp/ftpd manpage(s).
Attached is some TCP performance boilerplate which is a work-in-progress. It might have a slight Linux bias presently but the broad brush strokes should transfer pretty well.
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тАО02-27-2009 07:22 AM
тАО02-27-2009 07:22 AM
Re: NFS vs. SFTP which one faster?
Thanks a lot for your good suggestions.
Have a good day.
-Gary
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тАО02-27-2009 09:20 AM
тАО02-27-2009 09:20 AM
Re: NFS vs. SFTP which one faster?
NFS would probably be a better choice I would think.
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тАО02-27-2009 09:28 AM
тАО02-27-2009 09:28 AM