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13520 discussions

RE: How does FCP cfmode partner work?
by Hill, Aaron 27 Apr '05

27 Apr '05

Yeah you have pretty much worked it out. For FCP Partner cfmode, the filer uses a feature called "FCP Proxy" to forward requests to the partner LUN. As you said, in normal mode, primary paths are through the A port on Filer 1 and B'' port (second adapter) of Filer2. The FCP Proxy allows MPIO s/w to maintain active-passive connection by using the VTIC adapter between the two filers to proxy commands. As far as I know, your host requires MPIO software to achieve this. I don't think this has changed for 7G, but I haven't reviewed it yet. Thie whole thing is possible because the B ports WWPN/WWNN are based on the Partner nodes WWNN. Thus for AIX/HP-UX types, the requirement that static S_ID and D_ID are maintained because the WWPN/WWNN don't change during failover. This keeps the MPIO software happy. No changes on the switch are made. Both access the Filer1 LUNs via the A port on Filer1 and B port on Filer2 (FCP Proxy does the forwarding) B port WWNN/WWPN based on partner WWPN. Hope that explains it. Now, if you start doing mixed cfmode using the public loop/multi-ID, it will take me a little longer to explain. --Aaron -----Original Message----- From: Steve Losen [mailto:scl@sasha.acc.virginia.edu] Sent: Wednesday, 27 April 2005 8:23 AM To: toasters(a)mathworks.com Subject: How does FCP cfmode partner work? We recently set up a new FAS960c pair of filers running 7.0.0.1 and I am trying to understand how cfmode partner works. According to the "Block Access Management Guide for FCP" the A port on each FC adapter is for accessing local LUNs while the B port is for accessing partner LUNs. In "cfmode partner" both ports are active. So does that mean that in normal operation (no failover) that initiators (hosts) can access a LUN on filer 1 from a B port on filer 2? That is what the manual seems to indicate. How is this accomplished? Does it happen within the switch? Do FCP requests for a B port get forwarded to an A port on the partner during normal operation? Obviously during a failover the surviving head takes over the disks of its partner and then satisfies requests to the B port itself. Steve Losen scl(a)virginia.edu phone: 434-924-0640 University of Virginia ITC Unix Support ************** IMPORTANT MESSAGE ************** This e-mail message is intended only for the addressee(s) and contains information which may be confidential. If you are not the intended recipient please advise the sender by return email, do not use or disclose the contents, and delete the message and any attachments from your system. Unless specifically indicated, this email does not constitute formal advice or commitment by the sender or the Commonwealth Bank of Australia (ABN 48 123 123 124) or its subsidiaries. We can be contacted through our web site: commbank.com.au. If you no longer wish to receive commercial electronic messages from us, please reply to this e-mail by typing Unsubscribe in the subject line. ***************************************************************

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How does FCP cfmode partner work?
by Steve Losen 26 Apr '05

26 Apr '05

We recently set up a new FAS960c pair of filers running 7.0.0.1 and I am trying to understand how cfmode partner works. According to the "Block Access Management Guide for FCP" the A port on each FC adapter is for accessing local LUNs while the B port is for accessing partner LUNs. In "cfmode partner" both ports are active. So does that mean that in normal operation (no failover) that initiators (hosts) can access a LUN on filer 1 from a B port on filer 2? That is what the manual seems to indicate. How is this accomplished? Does it happen within the switch? Do FCP requests for a B port get forwarded to an A port on the partner during normal operation? Obviously during a failover the surviving head takes over the disks of its partner and then satisfies requests to the B port itself. Steve Losen scl(a)virginia.edu phone: 434-924-0640 University of Virginia ITC Unix Support

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command usage summary
by Tim Thompson 26 Apr '05

26 Apr '05

To inform decisions about future products, we at Network Appliance would like to get a feel for current command usage by customers, particularly as used from scripts. Unfortunately, autosupport doesn't contain the level of detail that we'd like to see. Attached below is a perl script that will look at the auditlogs of a filer running Data ONTAP and summarize command, sub-command, and api usage. Only a summary is produced - it shouldn't contain any customer-sensitive information. It will not put any load on the filer, and should consume only a minute or so of CPU time on the machine running the perl script (depending on how large your auditlog files are). Here's a small sample of the output: count=24 rsh=vol options count=9 rsh=vol status count=6 rsh=version count=5 rsh=sysconfig -a count=3 rsh=vol create count=3 rsh=reboot -t count=11 cons=version count=6 cons=options ldap count=22 api=perf-object-instance-list-info count=16 api=perf-object-counter-list-info count=13 api=options-get We would greatly appreciate it if anyone using Data ONTAP could run this script and send the output to usage(a)netapp.com (a special address set up to collect this data). Usage is described in the comments at the top of the file. Thanks much. ...Tim Thompson...Network Appliance, Inc...tjt(a)netapp.com... #----------------------------- cut here ----------------------------- #!/usr/local/bin/perl # # This script summarizes command and api usage on a # Network Appliance filer running Data ONTAP. In other words, it counts # how many times each command/sub-command has been used, by # looking at the auditlogs. # # Usage on Unix is: # # cd /mnt/$FILER/etc # where /mnt/$FILER is the mounted root volume # perl cmdsummary.pl # # or on Windows: # # cd F: # where F: is the mounted root volume # cd \etc # perl cmdsummary.pl # # In other words, change directories to the /etc directory of the # filer's root volume, and run this script. The script looks at # the messages file and all the auditlog files, and summarizes # command and api usage. my %rshusage; my %consusage; my %apiusage; my $system = ""; my $anyerr = 0; foreach $f (<messages log/auditlog*>) { if ( ! open(FF, $f) ) { print STDERR "Error: unable to open $f - $!\n\n" ."This program must be run in the " ."'etc' directory of the filer's root volume.\n\n"; $anyerr = 1; next } while (<FF>) { if ( /kern.log.rotate:/ || /log_rotate:/ ) { chop; $system = $_; $system =~ s/.*System /System /; } elsif ( /RSH INPUT COMMAND/ ) { my $s = $_; $s =~ s/.*RSH INPUT COMMAND is //; my @words = split(/[\s;]/,$s); my $cmd = $words[0]." ".$words[1]; if ( $words[0] ne "" ) { if ( not defined $rshusage{$cmd} ) { $rshusage{$cmd} = 1; } else { $rshusage{$cmd} += 1; } } } elsif ( /IN:console shell:/ ) { my $s = $_; $s =~ s/.*console shell://; my @words = split(/\s/,$s); my $cmd = $words[0]." ".$words[1]; if ( $words[0] ne "" ) { if ( not defined $consusage{$cmd} ) { $consusage{$cmd} = 1; } else { $consusage{$cmd} += 1; } } } elsif ( /Java_Thread.*:API:in:/ && ! /relog syslog/ ) { chop; my $api = $_; $api =~ s/[^<]*<//; $api =~ s/\/?>.*//; if ( not defined $apiusage{"Java-$api"} ) { $apiusage{"Java-$api"} = 1; } else { $apiusage{"Java-$api"} += 1; } } elsif ( /:API:in:/ && ! /relog syslog/ ) { chop; my $api = $_; $api =~ s/.*\/admin\'><//; $api =~ s/.*version="..."><//; $api =~ s/\/?>.*//; if ( not defined $apiusage{$api} ) { $apiusage{$api} = 1; } else { $apiusage{$api} += 1; } } } } if ( $system ne "" ) { print("$system\n"); } foreach $key ( sort { $rshusage{$b} <=> $rshusage{$a} } keys %rshusage ) { print("count=$rshusage{$key} rsh=$key\n"); } foreach $key ( sort { $consusage{$b} <=> $consusage{$a} } keys %consusage ) { print("count=$consusage{$key} cons=$key\n"); } foreach $key ( sort { $apiusage{$b} <=> $apiusage{$a} } keys %apiusage ) { print("count=$apiusage{$key} api=$key\n"); } exit($anyerr); #----------------------------- end of script -----------------------------

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Aggregate snapshots?
by Steve Losen 25 Apr '05

25 Apr '05

We just got a R200 and FAS960c and I immediately upgraded them from 6.5 to 7.0.0.1. I moved the root volume to a flex vol and destroyed the old root, so now I have one big aggregate that contains the root volume. I discovered the "df -A" command and was surprised to see that my aggregate has snap reserve space, a snap sched running, and five snapshots. This is independent of the snap reserve and sched of my root volume. What is the rationale behind aggregate snapshots? We don't have snapmirror licensed. Can you snapmirror them? Can you snaprestore them? I presume this mirrors (or restores) the entire aggregate. I doubt that you can access aggregate snapshots from a NFS or CIFs client, or can you? Can you somehow tease out volumes from an aggregate snapshot and NFS export them? Within an aggregate snapshot, do you have just the active volumes, or the volumes and all of their volume level snapshots as they existed at the time the aggregate snapshot was taken? Mind boggling. I am probably going to set the snap reserve on my aggregates to zero and turn off the snap sched and manage my snapshots at the volume level. Any reason to not do that? Using both aggregate and volume snapshots looks about the same as using a belt and suspenders to keep your pants up. Steve Losen scl(a)virginia.edu phone: 434-924-0640 University of Virginia ITC Unix Support

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quad nic's supported in F840 ?
by Tavis Gustafson 21 Apr '05

21 Apr '05

Does anyone know which quad ethernet card work in the F840 series? So far I have only tried the Matrox brand. I know that the Zynx brand works in the F760's, but I don't know if they'll work in the F840's. Anybody know? -tavis

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Drive burn-in tools.
by Maren S. Leizaola 21 Apr '05

21 Apr '05

Hi, We are currently looking for a nice drive burn in tool that will read-write and give the hard disks a good beating before we put them in production. This not Netapp specific but I just can't find anything. Before there was some great Free programs to do this, and somehow i can't find any... Regards, Maren. -------------------------------------------------------------- HKdotCOM Ltd Tel: 852 2865-4865 ext 888 Fax: 852 2865-4100 leizaola(a)hk.com AIM: MarenHKdotCOM ICQ: 39905706 MSN:MarenHKdotCOM -------------------------------------------------------------- Get your @hk.com email address on http://www.hk.com

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RE: mrtg config files
by Frank, Jason 21 Apr '05

21 Apr '05

I haven't heard of anything, and haven't nagged them for a year or so. If someone wants to respond though, I'm all ears. Jason -----Original Message----- From: Thomas Nail [mailto:tom.nail@amd.com] Sent: Thu 4/21/2005 9:51 AM To: Frank, Jason Cc: Munn, Stuart; toasters(a)mathworks.com Subject: Re: mrtg config files This is sort of off-topic, but is there any known roadmap for an SNMP v2c or V3 implementation from NetApp? Just curious, since I'm also using cacti and am kind of sick of having to poll NetApp's "all interfaces" traffic OIDs. -=Tom Nail Frank, Jason wrote: > In our house, I dropped MRTG last year, and I'm using Cacti instead (http://www.cacti.net) It works the same as MRTG under the wire, but is much easier to configure and manage. > > Let me guess, your network stats aren't correct on your GigE interfaces? Last time I looked, NetApp insists that SNMP v2c and v3 aren't mature enough for them to bother with. SNMP v1 only supports 32 bit variables, which overflow at about 115 Mbps. To get around that, NetApp provides high and low order 32 bit values for the network counters. You get to do the math yourself. Personally, I've found it much easier to just graph the switch port, which does support v2c. I've not seen any problems with the FE interfaces. > > Jason > > > _____ > > From: owner-toasters(a)mathworks.com [mailto:owner-toasters@mathworks.com] On Behalf Of Munn, Stuart > Sent: Thursday, April 14, 2005 9:41 AM > To: 'toasters(a)mathworks.com' > Subject: mrtg config files > > > > People, > > > > I've used the filer-mrtg scripts from Now in the past, but I'd prefer to go down the SNMP route, as I suspect the network stats are not working well on the later releases of ONTAP ... Has anyone got some mrtg config files they can share with me? > > > > I've tried using the search archive facility on the mathworks site but It's not much use as it does not sort in date order and you cannot see the whole of the subject! > > > > Any advice welcome... > > > > Cheers > > > > Stuart Munn > > > > SAIC Ltd > > > ------_=extPart_001_01C541D1.3989D04B-- >

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RE: mrtg config files
by Frank, Jason 21 Apr '05

21 Apr '05

In our house, I dropped MRTG last year, and I'm using Cacti instead (http://www.cacti.net) It works the same as MRTG under the wire, but is much easier to configure and manage. Let me guess, your network stats aren't correct on your GigE interfaces? Last time I looked, NetApp insists that SNMP v2c and v3 aren't mature enough for them to bother with. SNMP v1 only supports 32 bit variables, which overflow at about 115 Mbps. To get around that, NetApp provides high and low order 32 bit values for the network counters. You get to do the math yourself. Personally, I've found it much easier to just graph the switch port, which does support v2c. I've not seen any problems with the FE interfaces. Jason ________________________________ From: owner-toasters(a)mathworks.com [mailto:owner-toasters@mathworks.com] On Behalf Of Munn, Stuart Sent: Thursday, April 14, 2005 9:41 AM To: 'toasters(a)mathworks.com' Subject: mrtg config files People, I've used the filer-mrtg scripts from Now in the past, but I'd prefer to go down the SNMP route, as I suspect the network stats are not working well on the later releases of ONTAP ... Has anyone got some mrtg config files they can share with me? I've tried using the search archive facility on the mathworks site but It's not much use as it does not sort in date order and you cannot see the whole of the subject! Any advice welcome... Cheers Stuart Munn SAIC Ltd

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RE: Snapshot access from CIFS Windows XP SP2 Previous Versions.
by Palmer, Jason (EMEA) 20 Apr '05

20 Apr '05

We have set a policy to de-register the dll on selected machines or users - regsvr32 twext.dll /u /s This removes the previous versions tab when a drive properties are viewed. I do not think our user community are quite ready to facilitate their own restores just yet :o) Jason Palmer -----Original Message----- From: owner-toasters(a)mathworks.com [mailto:owner-toasters@mathworks.com]On Behalf Of jeff.mery(a)ni.com Sent: 20 April 2005 14:45 To: Holland, William L Cc: owner-toasters(a)mathworks.com; 'toasters(a)mathworks.com' Subject: RE: Snapshot access from CIFS Windows XP SP2 Previous Versions. Yep....but only on ONTAP 7.0 or better. This allows you to control the visibility of snapshots via the MS Shadow Copy (SC) client. Valid values: off - Disable snapshot access to all MS SC clients xp - Allow snapshot access from only XP SC clients pre-xp - Allow snapshot access from 2000 SC clients Jeff Mery - MCSE, MCP National Instruments ------------------------------------------------------------------------- "Allow me to extol the virtues of the Net Fairy, and of all the fantastic dorks that make the nice packets go from here to there. Amen." TB - Penny Arcade ------------------------------------------------------------------------- "Holland, William L" <hollandwl(a)state.gov> Sent by: owner-toasters(a)mathworks.com 04/20/2005 08:20 AM To "'toasters(a)mathworks.com'" <toasters(a)mathworks.com> cc Subject RE: Snapshot access from CIFS Windows XP SP2 Previous Versions. My guess is that it is somehow related to the cifs.ms_snapshot_mode setting -----Original Message----- From: owner-toasters(a)mathworks.com [mailto:r.stansfield@rri.sari.ac.uk] Sent: Wednesday, April 20, 2005 9:11 AM To: toasters(a)mathworks.com Subject: Snapshot access from CIFS Windows XP SP2 Previous Versions. A colleague has just told me that, with SP2 installed on Windows XP, File, Properties, Previous Versions displays snapshots. This has also come as a surprise to someone else: http://winxp.uwaterloo.ca/Documentation/WXP_SP2_ADSworkstation.htm#Snapshot Is this documented somewhere? Any more information? Roger Stansfield

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RE: Snapshot access from CIFS Windows XP SP2 Previous Versions.
by Holland, William L 20 Apr '05

20 Apr '05

My guess is that it is somehow related to the cifs.ms_snapshot_mode setting -----Original Message----- From: owner-toasters(a)mathworks.com [mailto:r.stansfield@rri.sari.ac.uk] Sent: Wednesday, April 20, 2005 9:11 AM To: toasters(a)mathworks.com Subject: Snapshot access from CIFS Windows XP SP2 Previous Versions. A colleague has just told me that, with SP2 installed on Windows XP, File, Properties, Previous Versions displays snapshots. This has also come as a surprise to someone else: http://winxp.uwaterloo.ca/Documentation/WXP_SP2_ADSworkstation.htm#Snapshot Is this documented somewhere? Any more information? Roger Stansfield

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