Razvan Corneliu VILT wrote:
> Hi,
>
> In my infinite search for a reliable work-around for the lack of bandwidth in 
> the United States*, I've reached the conclusion that I need a file-system 
> replication solution for the data stored on my ZFS partition.
> I've noticed that I'm not the only one asking for this, but I still have no 
> clear answer on my options from Google.
> After looking into some reports on rNFS on citi.umich.edu, I found out that 
> I'm not the only one with the problem (go figure). I am not really up to date 
> with the NFSv4 spec and drafts, but I am curious if rNFS is part of the 
> current NFSv4 spec or of the upcoming 4.1, and if it's considered or 
> available for OpenSolaris, or if there are any alternatives (such as a 
> replicated ZFS solution that supports simultaneous r/w access on at least 2 
> geographically separate servers).
> Some might argue that QFS + Sun Cluster is the way to go, but I need a few 
> things that ZFS currently offers (NFSv4 ACLs and snapshots that Samba can be 
> made aware of), and will want to move to CIFS server as soon as it's 
> production quality.
> Generally, the write traffic on the Samba shares that need replication is 
> light (around 1GByte/day), but it does need to happen whenever there's a 
> change.
> I've tried creating a smart cron script that runs unison every minute (lame, 
> I know), but it does not replicate the NFSv4 ACLs, and it's a rather bad 
> approach to the problem to start with. A daemonized unison with support for 
> all the ZFS features that gets the file-change notifications from the kernel 
> along with a distributed lock manager might do the job, but it's something 
> that I'm not qualified to write.
> I am sure that what I'm looking for is not unheard of. I am hopeful that the 
> ZFS+Lustre integration in the future might allow me something like this, but 
> it doesn't sound like it's close.
>
> Any sugestions?!?
>   

AVS.  See http://www.opensolaris.org/os/project/avs/
Jim Dunham has a good blog and demo on using it with ZFS.
 -- richard

> Cheers,
> Razvan
>
> * Our Bucharest branch has access to 10 Mbits/sec internationally and 100 
> Mbits/sec nationally (fiber of course) with BGP and our own IP classes, for 
> around EUR 250. This is in contrast with our San Jose, CA branch, which has a 
> connectivity budget of $700 and can get only a bonded-T1 at best in that 
> money (a T1 is $500 ($399 + taxes)). I wish that the most economically 
> advanced country in the world could have a decent internet infrastructure.
>  
>  
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>   

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