Author: "Krishnan, Ramamurthy (Temp)" <Ramamurthy.Krishnan AT KPMG.CO DOT UK>
Date: Thu, 11 Mar 2004 09:01:11 -0500
Hi all We have a set of NetApp 840 Filers that are connected to a ATL P7K through a Gigabit switch. NetWorker 6.1.3 runs on Solaris 8. The total backup size on an avg. is ~2TB a day. The backups do r
Are those LTO-1 or LTO-2 drives? What OnTap version are you running? Are you backing up by volume or quota-tree? -- Matthew Huff | One Manhattanville Rd Director of Operations | Purchase, NY 10577 OT
Author: "Krishnan, Ramamurthy (Temp)" <Ramamurthy.Krishnan AT KPMG.CO DOT UK>
Date: Thu, 11 Mar 2004 09:24:11 -0500
Matt - They are LTO-1 drives - OnTap version is 6.4.2 P9 - Backing up volumes. thanks - Krishnan Are those LTO-1 or LTO-2 drives? What OnTap version are you running? Are you backing up by volume or q
12MB/sec isn't really that bad for LTO-1 drives. 6.4.3 (I think they are up to P11) has some fixes to the slow start of dumps, but probably isn't your problem. You could switch to backing up by quota
Author: Howard Martin <howard.martin AT EDS DOT COM>
Date: Thu, 11 Mar 2004 10:09:39 -0500
which make of LTO? what hardware is the Legato server - number and type of HBA ? what is your maximum total throughput ? Legato GUI on solaris under reports speed by ~25% so you might be getting stre
Author: "Krishnan, Ramamurthy (Temp)" <Ramamurthy.Krishnan AT KPMG.CO DOT UK>
Date: Thu, 11 Mar 2004 10:43:35 -0500
The sun machine is a E250. LTO is LTO-1 in an ATL P7K library. We are'nt using compression and the average backup time runs to more than double of what you specify. Thanks - Krishnan which make of LT
Author: Howard Martin <howard.martin AT EDS DOT COM>
Date: Thu, 11 Mar 2004 11:01:03 -0500
Ah the E250 will only handle about 50MBytes/sec on Gigabit ethernet (varies slightly depending on the processor speed, so that is probably your bottle neck, if you could try the same setup on a 280R/
If you are doing NDMP backups, which it sounds like you are, the Sun really isn't a factor. -- Matthew Huff | One Manhattanville Rd Director of Operations | Purchase, NY 10577 OTA LLC | Phone: 914-46
With the NDMP backups, the filers are directly backing up to the tape drives over the switch. The SUN isn't involved. -- Matthew Huff | One Manhattanville Rd Director of Operations | Purchase, NY 105
Author: "Krishnan, Ramamurthy (Temp)" <Ramamurthy.Krishnan AT KPMG.CO DOT UK>
Date: Thu, 11 Mar 2004 11:57:20 -0500
Yeah! it looks the same way to me. The filers are connected to the library through a GbE switch. The backups happen only through NDMP. So I doubt if the server gets actively involved in transfer of d
Author: Howard Martin <howard.martin AT EDS DOT COM>
Date: Thu, 11 Mar 2004 12:00:34 -0500
Forgive me if I'm wrong but I thought it was an option to have the datapath through the Legato Server (which for some reason I assumed was the case!). -- Note: To sign off this list, send a "signoff
It seems you are hitting a bottle neck with indexes generation. Assuming you have N NDMP drives, the Netapp will send N independent data streams to your backup server containing the list of files bac
Author: Davina Treiber <Treiber AT HOTPOP DOT COM>
Date: Mon, 15 Mar 2004 18:10:00 +0000
That's a matter of opinion. I'd say it's a bit poor. The native speed is 15 or 16 MB/s depending on brand, and it's not even up to that figure. In a well configured environment I have seen sustained
Due to the nature of the ufsdump basis of the NetApp NDMP backup, 12MB/sec isn't bad. An optimized legato parallelized stream would be a different metric. -- Matthew Huff | One Manhattanville Rd Dire
Author: "Krishnan, Ramamurthy (Temp)" <Ramamurthy.Krishnan AT KPMG.CO DOT UK>
Date: Tue, 16 Mar 2004 03:45:03 -0500
Parallelism would have made some difference, of course. But since NDMP does'nt support multiple streams, we can't compare hand-to-hand with NDMP and non-NDMP backup speeds. Moreover in my case, out o
Author: "Krishnan, Ramamurthy (Temp)" <Ramamurthy.Krishnan AT KPMG.CO DOT UK>
Date: Tue, 23 Mar 2004 06:04:58 -0500
Are there any other intricacies in not backing up the indexes? What I gain is visible. Is there something I'd lose if I don't backup the index files (such as file level recovery not possible etc.,)?
You will loose the possibility to do "file recoveries" based on the "index" - list of files backed up. Your only possibility will be to recover the whole saveset or read the whole saveset bit by bit
Author: "Krishnan, Ramamurthy (Temp)" <Ramamurthy.Krishnan AT KPMG.CO DOT UK>
Date: Tue, 23 Mar 2004 09:44:36 -0500
I could'nt find much difference on the speed though, the IO traffic showed some. However, I don't think this gives a genuine picture as other groups that parallely run along with the tested group, do
I would run without the Indexes just to see what the difference in performance is. If there is a problem, then you can look to see if the bottleneck is in the NetApp network interfaces, network itsel
Author: Jack Lyons <jack.lyons AT MARTINAGENCY DOT COM>
Date: Fri, 26 Mar 2004 08:03:23 -0500
When you say NDMP doesn't support multiple streams. Are you saying that if there are two drives and two volumes, that I won't be able to back them up simultaneously? BTW, We are getting 1.2 TB backed