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13514 discussions

Fabric Metrocluster and FC switches
by Milazzo Giacomo 27 Nov '08

27 Nov '08

Hi all Up to now we've always successfully used Brocade 200E, 8 or 16 port, also because these are the only FC switches well documented in the TR3548 (Metrocluster Design and Implementation Guide). In that doc you can find also the correct cabling schema from shelves/heads to the correct port of switched. And in my experience it seems that MC software in Data Ontap seems to be stricly linked to the Brocade: if you wrong a cabling the system will warn you! Anyway I've read other docs where other model and/or vendors are cited as supported FC switches in a FMC config. McData, Cisco, other Brocade models and so on. Is someone there able to give me the right path on where to find documentation on how to cable/connect/use other switched than the 200E? The question comes because we're planning an extende FMC with DWDM switches and other appliances from Cisco and we could save a lot money (in connecting MC switches to DWDM devices...) using i.e. a superior Brocade model or a Cisco MDS. And again, what's about "dark side" of the fiber (not of the moon J). Apart the TR3552 on theory (and some practice) of optical network I was not able to found a doc/guide on, simplifying.... "where I need to link the LC/LC patch that comes from my MC switch? On which model/brand? What I've to ask to communication expert on the existing dark fiber and, over all, what I've to expect from him/her?" Thanks a lot PS) I've also tried to ask this at Prague NetApp Insight 2008 but I've got only...rumors...nothing concrete J

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RE: latency figures visible via SNMP?
by Buerger, Andreas 27 Nov '08

27 Nov '08

It historically logs that data by default, the default period for that is one week backwards, but I bet it's configurable. It helps us a lot, when somebody points the finger at us to look back what was going on during that time. ________________________________ From: Leeds, Daniel [mailto:dleeds@edmunds.com] Sent: Wednesday, November 26, 2008 8:52 PM To: Buerger, Andreas; A Darren Dunham Subject: RE: latency figures visible via SNMP? the perf advisor is real time right? ie it wont historically log this data and graph it later... ive used perf advisor in previous dfm releases and liked it but didnt enjoy having to sit and watch it for hours while waiting for intermittent issues to occur :) -- Daniel Leeds Manager, Storage Operations Edmunds, Inc. 1620 26th Street, Suite 400 South Santa Monica, CA 90404 310-309-4999 desk 310-430-0536 cell -----Original Message----- From: owner-toasters(a)mathworks.com on behalf of Buerger, Andreas Sent: Wed 11/26/2008 11:19 AM To: A Darren Dunham; toasters(a)mathworks.com Subject: RE: latency figures visible via SNMP? If you use dfm a look at the perf advisor might be helpful. Those data is collected via dfm, we use your mentioned figures as well to monitor vol specific statistics. You can enable/disable and configure the perf advisor options in dfm: perfAdvisorDisabledCounterGroups perfAdvisorEnabled perfAdvisorMaxMonitorThreads perfAdvisorPollInterval perfAdvisorShowAllViews perfAdvisorShowDiagCounters perfAdvisorTransport They improved the NMC java client a lot, it's a very helpful utility for specific perf monitoring with lots of detail. The SDK API also an option, but before putting a script together I would check, if the dfm offers enough for your needs. -----Original Message----- From: owner-toasters(a)mathworks.com [mailto:owner-toasters@mathworks.com] On Behalf Of A Darren Dunham Sent: Wednesday, November 26, 2008 6:59 PM To: toasters(a)mathworks.com Subject: Re: latency figures visible via SNMP? On Wed, Nov 26, 2008 at 01:22:33PM +0100, Stefan Funke wrote: > I didn't see that in SNMP either, but I've found something similar in > Manage Ontap SDK (http://communities.netapp.com/docs/DOC-1365): > [...] > > Thats far away from SNMP but maybe adoptable to your stats environment. Excellent, I'm not familiar with that, but I'll certainly investigate. I don't need SNMP per se. I'm just seeing how I can get the info from the filer with low overhead. I'd rather not fire off a lot of SSH sessions for what I need. So this might be fine. I have DFM, but I can't see that this value is gathered. Thank you for the pointer. -- Darren -- WINCOR NIXDORF International GmbH Sitz der Gesellschaft: Paderborn Registergericht Paderborn HRB 3507 Geschäftsführer: Eckard Heidloff (Vorsitzender), Stefan Auerbach, Dr. Jürgen Wunram Vorsitzender des Aufsichtsrats: Karl-Heinz Stiller Steuernummer: 339/5884/0020 - Ust-ID Nr.: DE812927716 - WEEE-Reg.-Nr. DE44477193 Diese E-Mail enthält vertrauliche Informationen. Wenn Sie nicht der richtige Adressat sind oder diese E-Mail irrtümlich erhalten haben, informieren Sie bitte sofort den Absender und vernichten Sie diese E-Mail. Das unerlaubte Kopieren sowie die unbefugte Weitergabe dieser E-Mail ist nicht gestattet. This e-mail may contain confidential information. If you are not the intended recipient (or have received this e-mail in error) please notify the sender immediately and destroy this e-mail. Any unauthorised copying, disclosure or distribution of the material in this e-mail is strictly forbidden. -- WINCOR NIXDORF International GmbH Sitz der Gesellschaft: Paderborn Registergericht Paderborn HRB 3507 Geschäftsführer: Eckard Heidloff (Vorsitzender), Stefan Auerbach, Dr. Jürgen Wunram Vorsitzender des Aufsichtsrats: Karl-Heinz Stiller Steuernummer: 339/5884/0020 - Ust-ID Nr.: DE812927716 - WEEE-Reg.-Nr. DE44477193 Diese E-Mail enthält vertrauliche Informationen. Wenn Sie nicht der richtige Adressat sind oder diese E-Mail irrtümlich erhalten haben, informieren Sie bitte sofort den Absender und vernichten Sie diese E-Mail. Das unerlaubte Kopieren sowie die unbefugte Weitergabe dieser E-Mail ist nicht gestattet. This e-mail may contain confidential information. If you are not the intended recipient (or have received this e-mail in error) please notify the sender immediately and destroy this e-mail. Any unauthorised copying, disclosure or distribution of the material in this e-mail is strictly forbidden.

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Re: Difference in # of files
by Barlow, Richard 27 Nov '08

27 Nov '08

Doesn't the folder itself count as an object? Are there also sub-folders? Sent from my Blackberry ------- Richard Barlow Senior Systems Engineer Chesapeake District 804.929.2500 ----- Original Message ----- From: Glenn Dekhayser <gdekhayser(a)voyantinc.com> To: toasters(a)mathworks.com <toasters(a)mathworks.com> Sent: Wed Nov 26 12:17:33 2008 Subject: Difference in # of files Someone out there has to know this. When I go into a folder in CIFS that only has files in it, it shows in the status bar 22 objects (files). I count, and verify. 22 files. I go up a folder, and right click the folder and do a ‘properties’, and it shows 23 files! I am NOT showing ~snapshot, and it shouldn’t matter if I did. My customer has the same problem, only the difference in his folder is 2 files (122 versus 120). Ideas anyone? _____________________________________________________________ Glenn Dekhayser | VP, Technology | VoyantStrategies O: (732) 335-1500 x514 | F: (732) 810-0378 AIM: gdekhayser | Yahoo: gdekhayser | http://www.voyantinc.com _____________________________________________________________

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latency figures visible via SNMP?
by A Darren Dunham 26 Nov '08

26 Nov '08

Looking through the mibs, I didn't see anything that seemed to be a match, but I thought I'd ask. Is there a way to grab the nfs latency figures via SNMP? netapp> stats show nfsv3 nfsv3:nfs:nfsv3_ops:3917/s nfsv3:nfs:nfsv3_read_latency:2254.40us nfsv3:nfs:nfsv3_read_ops:2022/s nfsv3:nfs:nfsv3_write_latency:420.56us nfsv3:nfs:nfsv3_write_ops:605/s I'm hoping it's in there and I've just missed it. Thanks! -- Darren

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Difference in # of files
by Glenn Dekhayser 26 Nov '08

26 Nov '08

Someone out there has to know this. When I go into a folder in CIFS that only has files in it, it shows in the status bar 22 objects (files). I count, and verify. 22 files. I go up a folder, and right click the folder and do a 'properties', and it shows 23 files! I am NOT showing ~snapshot, and it shouldn't matter if I did. My customer has the same problem, only the difference in his folder is 2 files (122 versus 120). Ideas anyone? _____________________________________________________________ Glenn Dekhayser | VP, Technology | VoyantStrategies O: (732) 335-1500 x514 | F: (732) 810-0378 AIM: gdekhayser | Yahoo: gdekhayser | http://www.voyantinc.com _____________________________________________________________

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Downgrading Data ONTAP?
by Simon Vallet 25 Nov '08

25 Nov '08

Hi, we recently updated ONTAP from 7.2.5.1 to 7.3 on our 3140c, which led to many problems : one head doesn't boot anymore, so the cluster failover is impossible; the other head (currently in takeover) seems to reboot randomly every week; and when this happens, it freezes some of our RHEL4 servers (kernel panics, somewhere in lockd). Putted shortly: this is a mess. The issues are currently investigated by NetApp, but it may take some time until we see a corrective action on their side. So we're investigating another solution, which would be to downgrade back into 7.2.5.1 (since it appears 7.2.6 doesn't seem very stable either). Would any of you know how to do that, or could point me at a proper procedure somewhere? NetApp support was unresponsive on this one, and I'm a bit concerned about possible changes to the WAFL layout or something similar between 7.2 and 7.3. Simon

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MS DPM
by Darish Rajanayagam 25 Nov '08

25 Nov '08

Toasters, Does anyone use Microsoft DPM for Exchange backups in a MSCS cluster using NetApp storage(iscsi)? Whenever the Exchange virtual server is moved over to a new node, DPM wants to perform consistency checks on the protected storage groups - according to Microsoft this should not be the case - if I were to expand the volume, we would need to run DPM consistency checks but not during normal cluster failover (DPM performs block level backup). I am having an issue where after every failover, I have to re-run consistency checks on all my storage groups (100 Storage groups!). I had a case open with Microsoft who asked me to contact NetApp - NetApp support wasn't very helpful in this matter. Before I proceed further, I am wondering if anyone else is experiencing this issue. Thanks, Darish

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FAS2050 with 20 disks
by Premkumar Subramanian 25 Nov '08

25 Nov '08

Hi, I plan to implement a FAS2050 with 20 internal SAS disks. I intend to have 12 disks on one of the controller and 8 on the other. the idea being to make use of processing power of both controllers. Now the trade-off is the number of spindles in each aggregate possibly affecting performance. I have seen a few people use just 2 disks on the second controller with no spares and have the other 16 disks+2 spares on a single controller. which of these two would be a better option? -- Best regards, Premkumar Subramanian

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Re: FAS2050 with 20 disks
by Premkumar Subramanian 24 Nov '08

24 Nov '08

I need to serve iscsi + CIFS. I would be servering around 1TB of cifs and 1.8 TB of iscsi data to vmware servers running SQL. We dont have any IOPS numbers. Question is what would be the performance impact...if any of a seperate aggregate of 8 disks on a seperate controller. Will the availability of the active second controller with 2GB RAM compensate for a smaller raid group. 2008/11/24 Webster, Stetson <Stetson.Webster(a)netapp.com> > It depends on the amount of risk exposure you want (in absence of the > spare), and performance impact you can withstand with the fewer disks. > > > > *Stetson M. Webster** > *Professional Services Engineer > NCIE-SAN, NCIE-B&R, SNIA-SCSE > NetApp Global Services - Southeast District > > 919.250.0052 Mobile > Stetson.Webster(a)netapp.com > > Learn how: netapp.com/guarantee > > > > [image: guarantee-email-sig2]<http://www.netapp.com/us/solutions/infrastructure/virtualization/guarantee.…> > > > > > *From:* Premkumar Subramanian [mailto:prem@x-or.co.uk] > *Sent:* Monday, November 24, 2008 2:42 PM > *To:* toasters(a)mathworks.com > *Subject:* FAS2050 with 20 disks > > > > Hi, > > I plan to implement a FAS2050 with 20 internal SAS disks. I intend to have > 12 disks on one of the controller and 8 on the other. > the idea being to make use of processing power of both controllers. Now the > trade-off is the number of spindles in each aggregate possibly affecting > performance. I have seen a few people use just 2 disks on the second > controller with no spares and have the other 16 disks+2 spares on a single > controller. > > which of these two would be a better option? > > -- > > Best regards, > Premkumar Subramanian > > > -- Best regards, Premkumar Subramanian XOR Technologies DDI: 0208 736 5884 Mobile: 07884477910 www.x-or.co.uk

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Very slow large file operations
by Page, Jeremy 22 Nov '08

22 Nov '08

I need help, I cannot figure out how to troubleshoot this problem further. We have a rebranded 3070A with ~200 VMs running on it. Maybe 30 on a batch of FC disks and the rest on 2 aggrs of 33 SATA drives each. None of the VMs are disk IO intensive. When I try and copy a VM to a new volume I get EXTREMELY slow speeds, something on the order of 3 gig an hour. I am also seeing incredibly slow Snapvault transfers and initializations. I think that in part we are hitting the sequential read bug, but this occurs even on volumes that do not have SIS enabled. For instance I have a snapvault job running that's been going for 4 days (!) and only xfered 260 gig. And it's an update so should always be hitting data (and thus not having the bug). Statit shows the drives all under 15% utilization. It's over dual 10gigE connections with the preferred adapter set (there are also 2 1 gig VIFs on this box for user and admin access). I'm at a loss. IBM says we need to upgrade (we are at 7.2.4) but I am concerned that it's not going to fix our problem and downtime windows are difficult to get so I want to make sure it's resolved with as little interruption as possible. Any suggestions on troubleshooting? Please be advised that this email may contain confidential information. If you are not the intended recipient, please do not read, copy or re-transmit this email. If you have received this email in error, please notify us by email by replying to the sender and by telephone (call us collect at +1 202-828-0850) and delete this message and any attachments. Thank you in advance for your cooperation and assistance. In addition, Danaher and its subsidiaries disclaim that the content of this email constitutes an offer to enter into, or the acceptance of, any contract or agreement or any amendment thereto; provided that the foregoing disclaimer does not invalidate the binding effect of any digital or other electronic reproduction of a manual signature that is included in any attachment to this email.

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