Author: simon.weaver AT astrium.eads DOT net (WEAVER, Simon)
Date: Mon, 31 Oct 2005 07:44:00 -0500
Hi Everyone Presently, firefighting NBU 5.x and 3.4 Master Servers with various backup issues which I will not bore you all about yet :-) I have just discovered a site that I work with has approx 10
Author: jlightner AT water DOT com (Jeff Lightner)
Date: Mon, 31 Oct 2005 09:29:04 -0500
MASTER SERVER A server that controls all other servers and clients and has most of your catalogs. Most people also use it as the robotic control host as well. It has direct write access to the tape d
Author: GreenbergKA AT aetna DOT com (Greenberg, Katherine A)
Date: Mon, 31 Oct 2005 09:40:08 -0500
One more thing... you also don't want to have 25 tape drives all being used by the same host at the same time, unless you've got 3 or 4 HBAs in the system. By adding Media servers, you can utilize al
Author: simon.weaver AT astrium.eads DOT net (WEAVER, Simon)
Date: Mon, 31 Oct 2005 10:05:52 -0500
Hi Kate Ideally, I wanted to have 1 master server, configured to use the robotic library and use as many drives as possible, leaving spares for restores / catalogue backups ect. So if I have 1 master
Author: GreenbergKA AT aetna DOT com (Greenberg, Katherine A)
Date: Mon, 31 Oct 2005 10:14:56 -0500
I'm saying from a Performance perspective, you do NOT want a single host using 25 tape drives at a time. You did state 25 drives, right? To get the best possible results you would want to throw a cou
Author: simon.weaver AT astrium.eads DOT net (WEAVER, Simon)
Date: Mon, 31 Oct 2005 10:21:03 -0500
Hi Kat No that's fine, thanks very much I apprecaite your comments a lot and have taken them on board. I just did not want to purchase multiple Media Servers without the correct planning. As a baseli
Author: jlightner AT water DOT com (Jeff Lightner)
Date: Mon, 31 Oct 2005 10:41:44 -0500
FYI: We actually define all of our Media Server "storage units" to see all the drives like the Master server "storage unit" does. Netbackup will not try to use the same drive on two different servers
Author: simon.weaver AT astrium.eads DOT net (WEAVER, Simon)
Date: Mon, 31 Oct 2005 10:44:26 -0500
Thanks Jeff, yes that was another issue, where the 2 jobs in questions have 2 streams, both using 2 separate drives. I can try and split them to create more streams, which I would hope is going to us
Author: GreenbergKA AT aetna DOT com (Greenberg, Katherine A)
Date: Mon, 31 Oct 2005 10:51:35 -0500
So, you're setting the storage units to be able to use every drive in the library, regardless of how many drives there are and then configuring your policies on a *how many data streams per policy* b
Author: jlightner AT water DOT com (Jeff Lightner)
Date: Mon, 31 Oct 2005 11:27:06 -0500
We're using a 20 drive library. Since we only backup the media servers through themselves and all other backups go through the master server we don't have to worry about performance conflicts. By str
Author: GreenbergKA AT aetna DOT com (Greenberg, Katherine A)
Date: Mon, 31 Oct 2005 11:29:33 -0500
That is the point I'm trying to make. If you are using 20 drives simultaneously from one host, you're probably not getting as good performance than if you were to distribute that load across a couple