You can slice and dice as you need to fill your requirements.
For instance, you may wish to share all four drives between Networker
and Storage Node. Yhen you may want to allow each SAN SN access to 1
drive (you can always have ressillience by allowing the data to go over
the network if access to the SAN drive fails for any reason)
This would give you 4 devices for the Networker server + 4 devices for
the SN + 1 each for the SAN SNs.
When checking with your Legato rep you may wish to clarify the total
device count given that you have Networker and 2 Storage Nodes (sounds
like you are a long way from a problem, last I heard was that the total
for devices (given maximum permitted Storage Nodes) was 128 devices (I
suspect that has gone up to 256 if not 512 by now... Or should do pretty
soon).
Regards
Bob
-----Original Message-----
From: T. S. Kimball [mailto:tkimball AT brass DOT com]
Sent: Wednesday, January 26, 2005 10:16 AM
To: Wood, R A (Bob)
Cc: Legato NetWorker discussion
Subject: RE: [Networker] AlphaStor: How many device slots will Legato
use for shared drive?
Hmm. We're planning on adding one Dedicated (SAN) Storage Node (the
other two are normal ones, and all of this is Network Ed.), so the
device useage for four drives sounds like 12. Not happy about that, but
can live with it.
What if I only needed one or two drives on the SAN-SN (since there's
only a couple 'small' filesystems on the SAN in question right now)? I
would assume that I could define only one or two Logical drives on that
system when re-defining the library in Networker. Please clarify if I'm
wrong here.
As for AS, I'll have to check that. From the discussions I had with the
Legato install tech at the time we may be Ok license-wise.
--TSK
On Wed, 26 Jan 2005, Wood, R A (Bob) wrote:
> Hi,
>
> Quite a few questions so I'll put mu comments in the text
>
> -----Original Message-----
> From: Legato NetWorker discussion
> [mailto:NETWORKER AT LISTSERV.TEMPLE DOT EDU]
> On Behalf Of T. S. Kimball
> Sent: Tuesday, January 25, 2005 8:44 AM
> To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
> Subject: [Networker] AlphaStor: How many device slots will Legato use
> for shared drive?
>
>
> We're getting ready to setup our first shared (Fibre) drives in
> Networker 7.1.2 for Solaris (aka Sun EBS). But I'm running across a
> possible AlphaStor snag which I do not see answered before. Given my
> previous experience with Legato on AlphaStor, I'd like to check here
> before calling them.
>
> We already have a mixed media solution for all direct-attatched
> devices, over the Server and two Storage Nodes, so AlphaStor is in
> use. And we have several Adv_file devices we'd like to setup as well.
>
> Our starting config will be to replace one of our old DLT-7000 drives
> with an LTO-2 FC-AL drive - for testing purposes - and share it
> between the Server and SN1 (SN2 is set aside for a specialized,
> dedicated solution).
>
> But since AS is doing the drive sharing, how many devices in Networker
> will this drive use?
>
> -
> This will count as two devices in Networker total device count and two
> shared device licenses in AlphaStor.
> -
>
> Since this is a Logical drive in Networker, will it count as one
> device total or two? It will be seen as two logical drives (one seen
> by the networker server and the other as a SAN storage node by the
> sharing device - will appear as rd=servername:devicename)
>
> Is there a special config for this in Networker?
>
> -
> No, well yes, but it is all taken care of by AlphaStor using the
> Library config wizard (the devices are checked by AlphaStor by loading
> a tape and checking on which drive, on each allowed host, that the
> tape can be
> seen)
> -
>
> I have conerns since we'll eventually replace four DLT drives to
> shared LTO-2, and if device slots are avail we'll look into sharing
> the remaining DLT as well using a converter/SCSI router.
>
> But I'd like to stay within the 48 total device limit, including 16 in
> use for 8 planned adv_file devices.
>
> -
> Drives that are shared count as a device one each of the shared hosts,
> the hosts that share the devices have to be set up as storage nodes
> (if they are going to be handling data other than their own) or SAN
> storage nodes. These storage nodes add to the total device count
> (can't remember the numbers but it is something like 16, 32 or 64
> devices depending on version - don't quote me on that, I'm sure
> someone will put firm figures to that) so you shouldn't run out of
> devices. Remember that you will also need AlphaStor licenses for the
> shared devices.
> -
>
> Library is an L700 (Diff-SCSI to server), 7 DLT-7000 direct on server
> (Diff-SCSI), 3 LTO-2 direct to SN2 (LVD-SCSI). AlphaStor is running
> on SN1. The Adv_file devices will reside on server and SN1, direct
> fibre-attatched (dual link, Veritas DMP).
>
>
> Thanks in Advance,
> --TSK
>
> ===== =====
> Timothy S. Kimball Tel/Cell:201.725-8426 Fax:201.239-5780
> System Administrator, 3rd/Night Shift tkimball AT brass DOT com
> ===== #include <std_disclaimers.h> =====
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