Comprehensive data protection for all workloads
Post Reply
Manico
Lurker
Posts: 2
Liked: never
Joined: Nov 22, 2011 1:44 pm
Full Name: Michael J Manico
Contact:

Slow Reverse Incremental Speed to Drobo FS

Post by Manico » Jan 09, 2012 1:36 pm

Just curious about anyones experience with this.
I'm getting 9mbs with local Reverse Incremental to a Drobo FS in hot add mode
I'm getting 52mbs replicating it over a 25meg pipe to a remote site.
this seems "strange to me" Any thoughts? Incrememntals screem but it took 32 hours to Roll up the chain into synthetic fulls.

Sethbartlett
Expert
Posts: 282
Liked: 25 times
Joined: Nov 10, 2010 6:51 pm
Full Name: Seth Bartlett
Contact:

Re: Slow Reverse Incremental Speed to Drobo FS

Post by Sethbartlett » Jan 09, 2012 5:16 pm

Is this a de-duplication device? Synthetic fulls do a lot of read/write and de-duplication devices are terrible at this, there are many, many posts on the forums about this :)
Skype: Sethbartlett88 - Make sure to label who you are and why you want to add me ;)
Twitter: @sethbartlett
If my post was helpful, please like it. Sometimes twitter is quicker to hit me up if you need me.

donb123
Novice
Posts: 4
Liked: never
Joined: Jan 09, 2012 3:05 pm
Full Name: Donald Brisson
Contact:

Re: Slow Reverse Incremental Speed to Drobo FS

Post by donb123 » Jan 09, 2012 6:54 pm

Manico wrote:Incrememntals screem but it took 32 hours to Roll up the chain into synthetic fulls.
If I remember correctly, I read about the Drobo FS on Ars and the general consensus was that it was spacious and easy but slow.

Given the amount of IO required to roll up the chain, your results seem to confirm the Drobo's poor performance capabilities.

tsightler
VP, Product Management
Posts: 5344
Liked: 2189 times
Joined: Jun 05, 2009 12:57 pm
Full Name: Tom Sightler
Contact:

Re: Slow Reverse Incremental Speed to Drobo FS

Post by tsightler » Jan 09, 2012 10:42 pm

How many spindles in your Drobo? Drobo can't break the law of physics which it comes to IOPs per drive. Incremental backups are streaming, reverse incrementals or rollbacks and random I/O. The difference is usually about 10x slower for random I/O if you don't have the spindles. Most Drobo (and other small NAS appliances) have plenty of space but very low spindle count.

Post Reply

Who is online

Users browsing this forum: Vitaliy S. and 66 guests