If you want simple, with compression, something like this (might be scp, might be -C): scp2 -rpd +C /top_dir1 /top_dri2 /top_dir3 remote_host:/
A Google tells me rcp never has compression, but rsync does.
The single tar ssh stream:
has no intermediate files, one requirement,
ssh might work for root when rsh does not, somewhat an implicit hidden potential requirement,
pads with nulls, a minor inefficiency cpio vs. tar (silly old command intended for tape drives),
has no compression, so network speed will choke it considerably (ssh has +C or -C for gzp -? compression. but separate compression processes gives you choice and control and another process to pipeline larallelize the job),
is single process, so i/o time and file search and open time will waste critical network time, not to mention single tcp socket, so there may be ack delays if max tss is not high enough, and delays if any packet is lost,
ssh adds encrypt/decrypt overhead/delay,
pipes and most of UNIX i/o is single buffered, so there will be time lost to blocking.
It turns out cp/*cp/rcp/scp/scp2 -r use cpio, which also has a local pass option, somewhat redundant to cp -r, but choice is good.
Last edited by DGPickett; 10-21-2010 at 10:53 AM..
Thanks very, very much. I'm going to try your script between two hosts today. One (final I hope) question. Where I said *transfer* I should have said *copy*. Will the tar script copy the files or will it actually move the files and directories from the old host to the new host? Thanks again.............. Blaine
---------- Post updated at 07:59 AM ---------- Previous update was at 07:55 AM ----------
citaylor,
Thanks very, very much for the help. I'll try the tar script today. One final (I hope) question... Will the tar script *copy* the files and directories actually *move* them from the old host to the new one?
Thanks again! Blaine
---------- Post updated at 08:17 AM ---------- Previous update was at 08:09 AM ----------
methyl,
I guess I should have been more explicit... the old host has a subdirectory /usr/local/coremobility/... with multiple files and subdirectories and files. I need to copy theses files and subdirectories onto the new host.
Thanks again!
Blaine
---------- Post updated at 08:19 AM ---------- Previous update was at 08:17 AM ----------
DGPickett,
Please see the post I made to methyl for the description of files and subdirectories I need to transfer from old host to new host. Sorry for the ambiguity!
Thanks...
Blaine
---------- Post updated at 08:21 AM ---------- Previous update was at 08:19 AM ----------
citaylor...
Thanks.. I'll give it a shot today!
Blaine
---------- Post updated at 08:27 AM ---------- Previous update was at 08:21 AM ----------
All,
I'd love to use scp but I understand that it doesn't follow links? Also, I am root on both machines. Bandwidth and CPU on either machine and the network are not an issue. If anyone thinks rsync is the way to go, I'm game. Then the question becomes how do I use rsync?
Sorry for the seemingly idiotic questions but I'm a little lost here.
. Thanks!
Blaine
---------- Post updated at 09:19 AM ---------- Previous update was at 08:27 AM ----------
citaylor,
So, in order to copy files and directories from oldhost to newhost I should execute:
?
Or do I have the hosts backwords?
Thanks.
My apologies in advance for being so dim and if I accidentally embedded the code line into the body of the test.
Hi All,
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