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Operating Systems Solaris Best way to copy 4Tb of data from one filesystem to another Post 302998042 by Peasant on Wednesday 24th of May 2017 12:15:39 PM
Old 05-24-2017
Do it on a block level if you can.

Use zfs send / receive using netcat (the data stream is not encrypted over network).
It really versatile, poor man enterprise level file system replication, features matching expensive storage arrays.

For local stuff, mirror the pool and use zpool split.
If you are using SVM, mirror, remove from mirror, use the copy.

Using cp/rsync on large number of files is bound to take longer on same hardware.

Alternatively, you can use dd as well if you want entire disks, but it's a one time crude operation and long requires downtime on source.
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APT-MIRROR(1)						User Contributed Perl Documentation					     APT-MIRROR(1)

NAME
apt-mirror - apt sources mirroring tool SYNOPSIS
apt-mirror [configfile] DESCRIPTION
A small and efficient tool that lets you mirror a part of or the whole Debian GNU/Linux distribution or any other apt sources. Main features: * It uses a config similar to apts sources.list * It's fully pool comply * It supports multithreaded downloading * It supports multiple architectures at the same time * It can automatically remove unneeded files * It works well on overloaded channel to internet * It never produces an inconsistent mirror including while mirroring * It works on all POSIX compliant systems with perl and wget COMMENTS
apt-mirror uses /etc/apt/mirror.list as a configuration file. By default it is tuned to official Debian or Ubuntu mirrors. Change it for your needs. After you setup the configuration file you may run as root: # su - apt-mirror -c apt-mirror Or uncomment line in /etc/cron.d/apt-mirror to enable daily mirror updates. FILES
/etc/apt/mirror.list Main configuration file /etc/cron.d/apt-mirror Cron configuration template /var/spool/apt-mirror/mirror Mirror places here /var/spool/apt-mirror/skel Place for temporarily downloaded indexes /var/spool/apt-mirror/var Log files placed here. URLs and MD5 summs also here. CONFIGURATION EXAMPLES
The mirror.list configuration supports many options, the file is well commented explinging each option. here are some sample mirror configuration lines showing the various supported ways : Normal: deb http://example.com/debian stable main contrib non-free Arch Specific: ( many other arch's are supported ) deb-powerpc http://example.com/debian stable main contrib non-free HTTP and FTP Auth or non-standard port: deb http://user:pass@example.com:8080/debian stable main contrib non-free Source Mirroring: deb-src http://example.com/debian stable main contrib non-free ORIGINAL AUTHOR
Dmitry N. Hramtsov <hdn@nsu.ru> CURRENT AUTHORS
Dmitry N. Hramtsov <hdn@nsu.ru> Brandon Holtsclaw <me@brandonholtsclaw.com> perl v5.14.2 2012-01-28 APT-MIRROR(1)
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