|
Re: [BackupPC-users] Block-level rsync-like hashing dd?
2011-04-12 22:14:57
On 13/04/2011 11:21 AM, Timothy J Massey wrote:
ZFS.
Sorry, unexplainable brain fade. Maybe I should concentrate more on
what I write. ZFS.
Remember, you have to get them to
another machine,
so ZFS or any other snapshot by itself won't finish the job:
you then need
to copy them somewhere else. This includes SAN based
solutions (though
in that case, "somewhere else" might just be defined as a
different
storage shelf...).
Ah, but that is where ZFS still provides the solution. Getting the
data somewhere else is as simple as:
[root@solaris]$ zfs snapshot master/data@1
[root@solaris]$ zfs send master/data@1 | zfs receive slave/data
The slave server, will now have an identical copy of the master. (Make it readonly for now however)
And the next time,
[root@solaris]$ zfs snapshot master/data@2
[root@solaris]$ zfs send -i master/data@1 master/data@2 | zfs receive slave/data
You will have only sent the differences between this snapshot and the last across.
So unlike ext3 + snapshots, ZFS will allow you to efficiently transfer your pool to another server.
So, I stick by my 4 options, with
one of them possibly
slightly renamed.
You might have me by definition on this. However, I like to think of
ZFS as significantly more capable than other snapshot techniques.
However, it comes with the obvious downside of having to run
Solaris. (FreeBSD is an option, but reportly the ZFS support isnt
quite there yet.) Distributions like Nexenta can somewhat mitigate
against this however.
|
------------------------------------------------------------------------------
Forrester Wave Report - Recovery time is now measured in hours and minutes
not days. Key insights are discussed in the 2010 Forrester Wave Report as
part of an in-depth evaluation of disaster recovery service providers.
Forrester found the best-in-class provider in terms of services and vision.
Read this report now! http://p.sf.net/sfu/ibm-webcastpromo _______________________________________________
BackupPC-users mailing list
BackupPC-users AT lists.sourceforge DOT net
List: https://lists.sourceforge.net/lists/listinfo/backuppc-users
Wiki: http://backuppc.wiki.sourceforge.net
Project: http://backuppc.sourceforge.net/
|
|
|
