Re: [PLUG] Backups vs Copies: was Avoid Arvixe at all costs!

["Lee H. Marzke" <lee@marzke.net>]

Yes,  and if the file is text, binary, dir, or whatever,   ZFS handles it.

Lee



----- Original Message -----
> From: "Rich Freeman" <r-plug@thefreemanclan.net>
> To: "Philadelphia Linux User's Group Discussion List" <plug@lists.phillylinux.org>
> Sent: Monday, March 27, 2017 12:42:26 PM
> Subject: Re: [PLUG] Backups vs Copies: was Avoid Arvixe at all costs!

> On Mon, Mar 27, 2017 at 11:56 AM, Lee H. Marzke <lee@marzke.net> wrote:
>>
>> You need a script such as zrep on top of ZFS to manage the create/destroy of
>> these periodic snaps, or that feature is built into the GUI of FreeNAS, Nexenta
>> etc.
>>
> 
> FWIW I've been using https://github.com/dajhorn/zfs-auto-snapshot/ to do this.
> 
>> The ZFS send replication does the same on the far end.  Some scripts allow you
>> to
>> keep more or fewer snaps on the destination than the source.
> 
> You can also just store the send files without actually receiving them
> into a replica, but yes, you need to actually send the snapshots
> someplace to really consider it a backup.  Now, the snapshots without
> any kind of replication will protect you from accidental file
> deletion, but the data is still sitting in the same physical place.
> ZFS send (and its btrfs equivalent) basically serialize a snapshot,
> either completely or incrementally from another snapshot.  It is going
> to be far less expensive in terms our IO/CPU/etc to generate an
> incremental send compared to an rsync, since ZFS and btrfs can figure
> out what changed without having to actually read all the inodes (which
> is what rsync has to do, and zfs/btrfs can also detect changes that
> don't touch the mtime on the inode or file size without reading the
> file contents).
> 
> --
> Rich
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-- 
"Between subtle shading and the absence of light lies the nuance of iqlusion..." - Kryptos 

Lee Marzke, lee@marzke.net http://marzke.net/lee/ 
IT Consultant, VMware, VCenter, SAN storage, infrastructure, SW CM 
+1 800-393-5217 office +1 484-348-2230 fax 
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