VM Replication Job direct SAN access mode

VMware specific discussions

VM Replication Job direct SAN access mode

Veeam Logoby GLu74 » Fri Mar 18, 2016 1:57 pm

Hi all,
One of limit in Veeam 9 about replica in SAN mode is:
Veeam Backup & Replication uses the Direct SAN access transport mode to read and write VM data only during the first session of the replication job.
[b]During subsequent replication job sessions, Veeam Backup & Replication will use the Virtual Appliance or Network transport mode on the target side[/b]. The source side proxy will keep reading VM data from the source datastore in the Direct SAN access transport mode.


Someone knows if this is by design and there is no way to have a workaround to use direct SAN access mode also for subsequent incremental replication job?
What i don't understand is why in the first full session works and following not?
Is this a limit that will be removed with fix or patch?

Thanks to everyone.
GLu74
Novice
 
Posts: 4
Liked: never
Joined: Fri Mar 18, 2016 1:44 pm
Full Name: Gianluca Laino

Re: VM Replication Job direct SAN access mode

Veeam Logoby foggy » Fri Mar 18, 2016 2:09 pm 1 person likes this post

This comes down to another limitation mentioned on the same help page, telling that direct SAN is only supported for thick-provisioned disks. Incremental data goes into a snapshot file and snapshots are always thin-provisioned.
foggy
Veeam Software
 
Posts: 14743
Liked: 1082 times
Joined: Mon Jul 11, 2011 10:22 am
Full Name: Alexander Fogelson

Re: VM Replication Job direct SAN access mode

Veeam Logoby GLu74 » Fri Mar 18, 2016 2:17 pm

Thanks for reply, understand you are right.
Is there a way to do an "always full" replica? This way i can always have use SAN mode.
GLu74
Novice
 
Posts: 4
Liked: never
Joined: Fri Mar 18, 2016 1:44 pm
Full Name: Gianluca Laino

Re: VM Replication Job direct SAN access mode

Veeam Logoby foggy » Fri Mar 18, 2016 2:34 pm

No, and this most likely would be slower than incremental run using hotadd mode anyway. Haven't you considered this approach?
foggy
Veeam Software
 
Posts: 14743
Liked: 1082 times
Joined: Mon Jul 11, 2011 10:22 am
Full Name: Alexander Fogelson

Re: VM Replication Job direct SAN access mode

Veeam Logoby GLu74 » Fri Mar 18, 2016 2:36 pm

Yes, but my customer ask a SAN mode approach. This is why.
GLu74
Novice
 
Posts: 4
Liked: never
Joined: Fri Mar 18, 2016 1:44 pm
Full Name: Gianluca Laino

Re: VM Replication Job direct SAN access mode

Veeam Logoby foggy » Fri Mar 18, 2016 2:37 pm

Any reasoning from his side behind this requirement?
foggy
Veeam Software
 
Posts: 14743
Liked: 1082 times
Joined: Mon Jul 11, 2011 10:22 am
Full Name: Alexander Fogelson

Re: VM Replication Job direct SAN access mode

Veeam Logoby GLu74 » Fri Mar 18, 2016 3:15 pm

Any operation at veeam backup/replica Jobs, needs to be lan-free.
GLu74
Novice
 
Posts: 4
Liked: never
Joined: Fri Mar 18, 2016 1:44 pm
Full Name: Gianluca Laino

Re: VM Replication Job direct SAN access mode

Veeam Logoby foggy » Fri Mar 18, 2016 5:45 pm

Hotadd also provides LAN-free data transfer.
foggy
Veeam Software
 
Posts: 14743
Liked: 1082 times
Joined: Mon Jul 11, 2011 10:22 am
Full Name: Alexander Fogelson


Return to VMware vSphere



Who is online

Users browsing this forum: Google [Bot], Yahoo [Bot] and 16 guests