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Operating Systems AIX AIX networking performance, during copying files Post 303029674 by supacat on Wednesday 30th of January 2019 12:02:23 PM
Old 01-30-2019
Quote:
Originally Posted by Corona688
You also have your disks to consider. How fast would that happen if you wrote to /dev/null instead of ssh?


Code:

du -sg 3.dmp 
1.00    3.dmp
bash-4.4# time ls ./3.dmp | cpio -ovB | cpio -imvdB /dev/null
3.dmp
20971602097160 blocks 
 blocks 

real    0m3.405s
user    0m2.064s
sys     0m0.934s

1 Gb for 3,4s, or ~300 MB/s (~30MB/s with ssh in comparsion).


Quote:
Does it speed up when you run it twice?
No, I don't observe such bechavior.
 

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CPIO(1L)																  CPIO(1L)

NAME
cpio - copy files to and from archives SYNOPSIS
cpio {-o|--create} [-0acvABLV] [-C bytes] [-H format] [-M message] [-O [[user@]host:]archive] [-F [[user@]host:]archive] [--file=[[user@]host:]archive] [--format=format] [--message=message] [--null] [--reset-access-time] [--verbose] [--dot] [--append] [--block-size=blocks] [--dereference] [--io-size=bytes] [--quiet] [--force-local] [--rsh-command=command] [--help] [--version] < name-list [> archive] cpio {-i|--extract} [-bcdfmnrtsuvBSV] [-C bytes] [-E file] [-H format] [-M message] [-R [user][:.][group]] [-I [[user@]host:]archive] [-F [[user@]host:]archive] [--file=[[user@]host:]archive] [--make-directories] [--nonmatching] [--preserve-modification-time] [--numeric-uid- gid] [--rename] [-t|--list] [--swap-bytes] [--swap] [--dot] [--unconditional] [--verbose] [--block-size=blocks] [--swap-halfwords] [--io- size=bytes] [--pattern-file=file] [--format=format] [--owner=[user][:.][group]] [--no-preserve-owner] [--message=message] [--force-local] [--no-absolute-filenames] [--sparse] [--only-verify-crc] [--to-stdout] [--quiet] [--rsh-command=command] [--help] [--version] [pattern...] [< archive] cpio {-p|--pass-through} [-0adlmuvLV] [-R [user][:.][group]] [--null] [--reset-access-time] [--make-directories] [--link] [--quiet] [--pre- serve-modification-time] [--unconditional] [--verbose] [--dot] [--dereference] [--owner=[user][:.][group]] [--no-preserve-owner] [--sparse] [--help] [--version] destination-directory < name-list DESCRIPTION
GNU cpio is fully documented in the texinfo documentation. To access the help from your command line, type info cpio The online copy of the documentation is available at the following address: http://www.gnu.org/software/cpio/manual CPIO(1L)
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