REFS+9.5 volume size limitations?

Availability for the Always-On Enterprise

REFS+9.5 volume size limitations?

Veeam Logoby mkretzer » Sun Sep 18, 2016 9:50 am

Hello,

are there any limits for the size of the REFS volumes which can be used with 9.5 and the new REFS function?

If i understand correctly it makes sense for the full, incr and GFS backups to be on one volume to fully use the functunality, correct? That means the volumes can/should be quite huge.

Windows Dedup has the 64 TB "limit" - is there something simliar with REFS?

Markus
mkretzer
Expert
 
Posts: 306
Liked: 67 times
Joined: Thu Dec 17, 2015 7:17 am

Re: REFS+9.5 volume size limitations?

Veeam Logoby dellock6 » Sun Sep 18, 2016 10:37 am

I think you will have to split data for limiting the failure domain, way before you will hit any refs limit. Maximum file is 16 exabyte and maximum volume is 1 yottabyte!
Also, yes you may want to keep files together to leverage block clone, but still remember to have backups and backup copies in two different storage systems.
Luca Dell'Oca
EMEA Cloud Architect @ Veeam Software

@dellock6
http://www.virtualtothecore.com
vExpert 2011-2012-2013-2014-2015-2016
Veeam VMCE #1
dellock6
Veeam Software
 
Posts: 5047
Liked: 1330 times
Joined: Sun Jul 26, 2009 3:39 pm
Location: Varese, Italy
Full Name: Luca Dell'Oca

Re: REFS+9.5 volume size limitations?

Veeam Logoby nmdange » Sun Sep 18, 2016 12:57 pm

Right now my backup repositories are 44TB in size to stay under the 64TB chkdsk limit with NTFS. Without that limit with ReFS I am definitely going to reformat my disks to consolidate what are currently separate RAID disks into one. However I am going to keep each RAID disk within a single disk enclosure just in case.
nmdange
Expert
 
Posts: 191
Liked: 57 times
Joined: Thu Aug 20, 2015 9:30 pm

Re: REFS+9.5 volume size limitations?

Veeam Logoby Gostev » Sun Sep 18, 2016 3:19 pm

dellock6 wrote:Maximum file is 16 exabyte and maximum volume is 1 yottabyte!

1 YB is theoretical, Windows addresses 16 EB maximum.
Gostev
Veeam Software
 
Posts: 21390
Liked: 2349 times
Joined: Sun Jan 01, 2006 1:01 am
Location: Baar, Switzerland

Re: REFS+9.5 volume size limitations?

Veeam Logoby mkretzer » Sun Sep 18, 2016 9:40 pm

I wonder: how much sense do dedup storages make in the future?
We did some tests with windows dedup and found out that even with per-VM dedup rate is about 12 % with about 500 VMs (Veeam Dedup on).

Now with REFS we will not have these 12 % dedup between backup files but everything else (GFS, SynFull...) will be "deduplicated" EVEN WITH ENCRYPTION ON...

One question: what will happen it we evacuate a SOBR extend which is REFS to another REFS extend? Will the data still be "deduplicated"?
mkretzer
Expert
 
Posts: 306
Liked: 67 times
Joined: Thu Dec 17, 2015 7:17 am

Re: REFS+9.5 volume size limitations?

Veeam Logoby dellock6 » Sun Sep 18, 2016 9:58 pm

Dedupe: it's the same doubt I have, with the addition of S2D , win2016 + ReFS will allow for some really cool designs.
Evacuate: no, because file copy is not a transform operation where Veeam will invoke the block clone api. Unless we do some additonal magic I'm not aware :)
Luca Dell'Oca
EMEA Cloud Architect @ Veeam Software

@dellock6
http://www.virtualtothecore.com
vExpert 2011-2012-2013-2014-2015-2016
Veeam VMCE #1
dellock6
Veeam Software
 
Posts: 5047
Liked: 1330 times
Joined: Sun Jul 26, 2009 3:39 pm
Location: Varese, Italy
Full Name: Luca Dell'Oca

Re: REFS+9.5 volume size limitations?

Veeam Logoby mkretzer » Mon Sep 19, 2016 4:21 am

@dellock6: So new feature request from me: Application/Veeam side "Storage VMotion" for backup files between REFS volumes!
mkretzer
Expert
 
Posts: 306
Liked: 67 times
Joined: Thu Dec 17, 2015 7:17 am


Return to Veeam Backup & Replication



Who is online

Users browsing this forum: Bing [Bot], Google [Bot], k00laid and 49 guests