FreeNAS to FreeNAS Sync?

[nogi]

Hi, I’m about to build a 2nd FreeNAS box which will be identical to my current one:

• HP Microserver N36L
• 8Gb ECC RAM
• 4 x Hitachi 3 TB (7k3000) HDDs
• NC360T Dual Gig NIC + on-board in LAGG

I would like for this to be a real-time replica of the first. What’s the best way to do this?

 

[ProtoSD]

Hi Noeneel,

Have a look at this page from the documentation:

http://doc.freenas.org/index.php/Replication_Tasks

You're not the first one to ask this question here, do some searching and you'll find the answers/details here in the forum.

 

[Durkatlon]

For real-time replica I would definitely go with ZFS snapshots+replication. For slightly less frequent replication (once a day for instance), rsync might be the better choice, only because it seems to be easier to use and get going. I'm sure once you have a smooth running ZFS replication setup, it's just as good and stable, I just had a hard time with it when i was futzing around with the myriad settings and ssh keys.

 

[nogi]

Thanks guys. I'm wondering if setting up a daily rsync is going to be easier for me to get going from day 1. I've just printed the FreeNAS manual for some lunch time reading.

 

[nogi]

Ok, I setup rsync as per http://doc.freenas.org/index.php/Rsync_Tasks for syncing between 2 FreeNAS servers. It’s working but not like the way I would like….

Source mount: /mnt/DATA
Destination mount: /mnt/KDATA

I was expecting the contents of DATA to be replicated into KDATA but instead, it’s replicating to KDATA/DATA. How can I prevent it from creating a sub-directory?

I want

Code:

/mnt/DATA/Folder 1
/mnt/DATA/Folder 2
/mnt/DATA/Folder 3

To replicated as

Code:

/mnt/KDATA/Folder 1
/mnt/KDATA/Folder 2
/mnt/KDATA/Folder 3

Not as

Code:

/mnt/KDATA/DATA/Folder 1
/mnt/KDATA/DATA/Folder 2
/mnt/KDATA/DATA/Folder 3

 

[Durkatlon]

Add a slash to the end of both the source and destination folders.

 

[Milhouse]

Try adding /. to the source directory...

Also best to work out the required rsync arguments at the CLI (using --dry-run option), adding -i to show what files would be transferred and where.

Something like "rsync -tiprogl --delete --dry-run /mnt/DATA/. /mnt/KDATA" might work.

Edit: As Durkatlon suggests, just a slash should fix your problem.

 

[nogi]

Thank you, I will try that tonight.

 

[nogi]

Ok, adding the /. at the end of the path doesn't appear to do anything. When it saves, it removes it?

 

[Milhouse]

Hmmm yes, the GUI will remove trailing slashes... I might consider that a bug/enhancement.

 

[Durkatlon]

Hah hah, weak. :D I guess this is why I used a manual script instead of the GUI to set up rsync. Yeah, you should file a bug report on this one. Hard to believe other people haven't complained about this yet.

 

[nogi]

Hmmm yes, the GUI will remove trailing slashes... I might consider that a bug/enhancement.

I've created a thread in the bugs sub forum: http://forums.freenas.org/showthrea...UI-removes-trailing-slashes&p=14674#post14674.

I think this one can be closed now.