Thanks, Wes. I had the section loaded in my Paste buffer anyway, so here it
is:
I think the real answer to your question is found in
http://web1.legato.com/infodev/publications/NetWorker/WINDOWS/6.1.3/winrs.pd
f on p. 22. Here's the section, in full:
"Large Number of Devices Are Supported in an Enterprise Environment
"In a NetWorker environment, every tape drive is controlled by an nsrmmd
daemon.
When the server and storage nodes share all drives, the number of nsrmmd
daemons
is the number of storage nodes (including the server) times the number of
shared
drives. For example, a datazone with six shared drives and seven hosts would
have 42
nsrmmd daemons.
"For releases prior to 6.1.3, Legato recommends 45 nsrmmd daemons forWindows
and
64 for UNIX. This is a recommended number of nsrmmd daemons in a datazone,
but
this can vary with the hardware, software or workload. Therefore, these
numbers are
not limits, but rather recommendations. There are enterprise environments
that have
stable NetWorker datazones with more than 60 nsrmmd daemons with Windows
NetWorker servers and more than 100 nsrmmd daemons with UNIX NetWorker
servers.
"Legato has successfully tested 133 nsrmmd daemons and 26 physical tape
devices (20
LTO and 6 DLT8000) shared among 7 heterogeneous Storage Nodes and NetWorker
6.1.3 UNIX and Windows 2000 Servers.
"Important: The number 133 is not a limit, but rather a recommendation."
-----Original Message-----
From: Wes Ono [mailto:wono AT legato DOT com]
Sent: Wednesday, December 18, 2002 3:21 PM
To: 'Legato NetWorker discussion'; 'lemons_terry AT EMC DOT COM'
Subject: RE: [Networker] 28 Storage Nodes
6.1.3 is supposed to scale better. See page 22 in the 6.1.3 Release
Supplement (
http://web1.legato.com/infodev/publications/NetWorker/WINDOWS/6.1.3/winrs.pd
f
<http://web1.legato.com/infodev/publications/NetWorker/WINDOWS/6.1.3/winrs.p
df> ) for more info.
Wes
-----Original Message-----
From: Terry Lemons [ mailto:lemons_terry AT EMC DOT COM
<mailto:lemons_terry AT EMC DOT COM> ]
Sent: Wednesday, December 18, 2002 2:14 PM
To: NETWORKER AT LISTMAIL.TEMPLE DOT EDU
Subject: Re: [Networker] 28 Storage Nodes
Hi John
You've hit a scaling problem with NetWorker, one that is particularly
painful on its Windows platform. In your environment, your NetWorker server
master process [nsrd] must control (14*6) [DDS]+ 14*1 [local tape drive(s)]
= 98 nsrmmd processes. Check the documentation, but I'm pretty sure that
NetWorker V6.1.1 does not support that many. Also check V6.1.3 (and, maybe,
V6.2) to see if that limit has been increased in those versions.
Good luck!
tl
Terry Lemons
CLARiiON Applications Integration Engineering
EMC²
where information lives
4400 Computer Drive, MS D239
Westboro MA 01580
Phone: 508 898 7312
Email: Lemons_Terry AT emc DOT com
-----Original Message-----
From: Ballinger, John M [ mailto:john.ballinger AT PNL DOT GOV
<mailto:john.ballinger AT PNL DOT GOV> ]
Sent: Wednesday, December 18, 2002 2:56 PM
To: NETWORKER AT LISTMAIL.TEMPLE DOT EDU
Subject: [Networker] 28 Storage Nodes
We have a NetWorker 6.1.1 Backup Server on Win2k that runs fine with a
limited number of backups but fails with all kinds of network-error
appearing problems if you go above.
We have 28 storage nodes - 14 of these are on the SAN sharing via DDS 6 tape
drives on an ADIC Scalar 1000
and the other 14 have locally attached tape-drives.
So we think the problem is with some resource on the win2k NetWorker backup
server.
Specifically the number of tcp connections.
Has anyone seen this or have any ideas of how to confirm it / and /or fix
the problem?
thanks - John
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