scp or rsync multiple files in parallel from a remote host
Hi.
I'm trying to speed up an rsync command by running it in parallel. There's no real option for this other than if the files are in multiple directories (which they're not). And even then there's no way of knowing if rsync has succeeded as the process is running in the background .. and there's no return code from the process id. Any ideas?
I thought about just using scp but scripting it is proving trickier than I thought and I'm getting errors on the for loop when I try to introduce variables into the ssh part:
E.g.
Code:
RHOST=srv245005
CCMD="ls /db/remote_backup_area"
for BackupFile in 'ssh -q oracle@${RHOST} ${CCMD}'; do
echo "attempting to copy file: " $BackupFile
scp -p $hostname:/db/remote_backup_area/$file /db/local_dump_area
# or use rsync
#rsync -av -e ssh oracle@${RHOST}:/db/remote_backup_area/${BackupFile} /db/local_dump_area"
done
exit
Any help much appreciated.
Moderator's Comments:
code tags please
Last edited by jim mcnamara; 08-06-2012 at 02:47 PM..
I need to know how to successfully back up(and compress) files from a local machine to a remote host.
Will this work?
tar -cvf backup.tar -C /user/somedir | gzip backup.tar | rsh some.domain.com/user/somedir
thanks in advance! (3 Replies)
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---
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Hope all are doing well.
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Discussion started by: mohtashims
1 Replies
LEARN ABOUT DEBIAN
slack.conf
slack.conf(5) File Formats Manual slack.conf(5)NAME
slack.conf - configuration file for slack
DESCRIPTION
The file /etc/slack.conf contains configuration information for slack(8) and its backends. It should contain one keyword-value pair per
line, separated by an '=' sign. Keywords must consist solely of capital letters and underscores. Values may take any appropriate format,
but must not begin with a space. Comments start with '#', and all text from the '#' to the end of a line is ignored. Trailing whitespace
on lines is ignored. Empty lines or lines consisting of only whitespace and comments are ignored.
Valid keywords are:
SOURCE The master source for slack roles. It can be in one of four forms:
o /path/to/dir
Use a local directory.
o somehost:/path/to/dir
Use given directory on a remote host via rsync over SSH.
o rsync://somehost/module
Use module on a remote rsyncd server (directly over the network).
o somehost::module
Use the rsync daemon protocol over SSH to the given host. See "USING RSYNC-DAEMON FEATURES VIA A REMOTE-SHELL CONNECTION" in
rsync(1)
All forms of SOURCE are passed directly to rsync, so you can do things like add "user@" before the host on any remote forms. For
more about what rsync can do, see its manual page, of course.
For the last form, however, we do a little magic. rsync treats the last two forms equivalently, so we overload the last form by
automatically passing "-e ssh" to rsync when we see it. This hack lets us tell slack to use this nice feature of rsync just using
the SOURCE config option.
ROOT The root filesystem into which to install slack roles. Usually '/'.
ROLE_LIST
The location of the role list, which lists the roles to be installed by default on each host.
This can be a path relative to the source, or can be an entirely separate location if it starts with a slash or a hostname (option-
ally preceeded by user@).
CACHE A local cache directory, used as a local mirror of the SOURCE.
STAGE A local staging directory, used as an intermediate stage when installing files.
BACKUP_DIR
A directory in which to keep dated backups for rollbacks.
EXAMPLE
A typical file might look like this:
# slack.conf configuration file
SOURCE=slack-master:/slack # source is on a remote
# host named "slack-master"
ROLE_LIST=slack-master:/roles.conf
ROOT=/
CACHE=/var/cache/slack
STAGE=/var/lib/slack/stage
BACKUP_DIR=/var/lib/slack/backups
FILES
/etc/slack.conf
SEE ALSO slack(8), rsync(1)File formats 2005-05-23 slack.conf(5)
08-06-2012
