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13520 discussions

How widely is the MetroCluster construct used outside the DACH region?
by Strauss Wolfram 26 Nov '14

26 Nov '14

NetApp MetroCluster, and the SyncMirror component in particular, is a construct mainly demanded by companies in the DACH region, as I was told by NetApp. We are a Swiss company and our management often demands synchronous data replication between two datacenters on the storage level, hence we have quite a couple of MetroClusters running. How many of you outside the DACH region are using MetroClusters? And for those who don't, how do you deal with synchronous replication of data? Do you solve the problem on higher layers (OS, application, etc.) or are your requirements simply less strict, so that e.g. snapmirror asnyc is sufficient? Wolfram

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CDOT alternative to 7-mode netbios alias
by Kevin Richards 26 Nov '14

26 Nov '14

Hi, Looks like NetBIOS aliases are no longer supported with CDOT. What recommendations do people have to consolidate many different Windows file servers to a new CDOT cluster? Thank you. Kevin

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Need Working Nexus 7000 Config for cDOT - 2 scenarios
by Bob McKim 25 Nov '14

25 Nov '14

Hi toasters, I'm looking for a working Nexus 7000 config for the following 2 scenarios - Single mode 10g ifgrp (2 interfaces) with 2 vlans 2 switch vPC for a two interface 10g ifgrp with 2 vlans If we bring the single mode ifgrp (e0b and e0d) up with no vlan tagging, it works fine for each sub-net. As soon as we add vlan tagging on cluster nodes, we can't ping the gateways. Require the vlan tagging to support our failover groups. This is what we tried on the Cisco for the single mode with 2 vlans - no dice. config t interface Ethernet1/14 description <<xxx>> switchport mode trunk switchport trunk native vlan 26 switchport trunk allowed vlan 26, 28 no shutdown Thanks in advance, Bob McKim Senior IT Specialist IBM Global Technology Services NetApp Certified Professional Although no hardware was injured in the creation of this note, a few billion electrons and photons were utilized against their will.

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NetApp 3170 and drive array ds14_NOT_mk2??
by CH 22 Nov '14

22 Nov '14

So I seem to be the place old NetApps go to die locally. This one is a v3170 which powers up fine but this drive array (DS14 version 1?) is a bit puzzling because documentation is hard to find. The person that brought it to me just provided the black (termination?) cables but wasn’t sure if they are hooked up right. Also it looks like i have two different types of fiber between the drive shelves and 3170,(SC and LC?) so not completely sure these really went together in their previous lives in production. (would this cable connect them? http://www.ebay.com/itm/271651441657?_trksid=p2060778.m1438.l2649&ssPageNam…) Any ideas? https://plus.google.com/photos/107454380334199416485/albums/608198030151578…

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Domain trust
by Camillo Gornati 12 Nov '14

12 Nov '14

Hello all! Is it possible to map users on a different domain on a netapp CIFS? Maybe using domain trusts? We are starting migrating data from domain A to domain B, but after data migration, users will also be moved to a difference domain... Sent using morse code!

2 1

Subsecond Timestamps?
by Steven Kreuzer 12 Nov '14

12 Nov '14

Did NetApp add sub second timestamps? I had a conversation with a NetApp engineer in 2011 saying that it won't be possible to add support for subsecond timestamps in nfsv3. However, if I stat a file via nfs on a filer running 8.1.2 I appear to be getting something back steven@warthog1:~ $ python -c "import os; print '%.6f' % os.stat('foo').st_mtime" 1415818448.392293

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cdot NFS exports
by Iluhes 12 Nov '14

12 Nov '14

Hi toasters, NFS export in CDOT (ouch) I understand I have to have a default policy and a rule.. 1. Must it have 0.0.0.0/0 read only? What if I dont want to give read-only to entire name space to all clients? 2. Qtrree exports: can I restrict qtree A to host A, and qtree B to host B, but then what about volume and it is policy? Can qtree be more restrictive than volume (and why dont qtree show up in GUI?) 3. Does showmount -e LIF of NFS filer still produce good information. It does not look like, so how do I check what my exports are? 4. What does it buy me with qtree exports, what? If I have to give access to server A and B to volume that has qtree A and B

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Flash Pool on a 2240-2 Running 8.1.3 7-Mode
by Philbert Rupkins 11 Nov '14

11 Nov '14

Hello, We are considering the addition of a Flash Pool to our 2240 arrays. We currently run ONTAP 8.1.3 7-mode with no plans of upgrading to 8.2.x. Per the docs, 8.1.3 allows us a total Flash Pool SSD cache capacity of 400G for the entire 2240 array. We're told we can't get 100G drives so our next best option is 200G drives. The problem with using 200G drives for the Flash Pool aggregate's SSD cache is that we'll be limited to a single 200G SSD drive to be used for cache behind each 2240 controller. Why is the is a problem? Well, the Flash Pool TR and FAQ touches on the possibility of the SSD cache becoming a bottleneck. I'd imagine this is more likely with just a single 200G data disk in the RAID-DP SSD cache. What makes it more of a concern is NetApp stating that a single SSD drive is capable of roughly 5,000 IOPS (I assume at a 4K 70r/30w workload) while the 2240 is capable of 15,000+ IOPS while processing the same workload. Note: We'd like to flash pool enable both controllers in the array and the SSD cache is required to be RAID-DP as the aggregate is RAID-DP and we are running 8.1.3. My questions: Are my concerns warranted? Has anybody had good or bad experiences with Flash Pool and the 2240 arrays? Anybody running a similar configuration to what is outlined above? I'd love to hear about your experiences. Thanks, Phil

2 1

Setting Flow Control to None on Production Filers
by Philbert Rupkins 11 Nov '14

11 Nov '14

Hello, Anybody have experience setting Flow Control to none on an array (controllers) that are already being used in production? We have a number of filers that were deployed with Flow Control set to Full on the 10GE interfaces. NetApp best practices recommend setting Flow Control to none. Is it preferable to: a) Update the RC file with the Flow Control settings and do a takeover/giveback to apply the new flow control settings? b) Modify the interface Flow Control settings directly with the system up and running? Then update the RC file so those settings will persist across future takeover/givebacks? I know the interface would 'reset' and I'm not sure how long of an outage we can expect. c) Something else? Our busiest ethernet based clients are VMWare ESXi hosts with pretty busy NFS datastores. Thank you all in advance! Phil

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"Sensitive data" storage needs
by Michael Garrison 10 Nov '14

10 Nov '14

We currently offer a NFS v3 service that people can purchase. It's relatively inexpensive and basic, but thats what folks like. They can access it from their desktop and then access the data on a cluster to do compute jobs. However, it doesn't meet the requirements of being able to store sensitive data - like ePHI. I've been exploring the route of NFS v4 with Kerberos, but the Linux client leaves a lot to be desired. Additionally, folks are so used to how NFS v3 works that introducing Kerberos into the mix is challenging. How are other groups (business, academic, whatever), addressing security, yet doing it in an inexpensive manner and allowing cross-platform access? Is anyone doing NFS v4 (or v3) with Kerberos today? Thanks, Mike Garrison

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