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13515 discussions

new cdot NFS vserver. NFS mount point hang on I/O
by Iluhes 14 Jan '15

14 Jan '15

Hi Folks,New cdot isntall, new NFS vserver. NFS shares can be mounted OK on linnux and solaris clients.I can mkdir and touch files. Copy or move or DD or any I/O operation completly hangs the mount point, the process cannot be Control-C, and kill -9 does not even help

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Is it possible to copy a qtree to its own volume?
by Basil 13 Jan '15

13 Jan '15

I'm trying to take a qtree and move it into its own flexvol (7 mode). It has millions of small files, so robocopy or ndmpcopy are taking too long for the final pre-cutover sync of the migration. So far, the best option I can come up with is to use qtree snapmirror to copy it into a qtree in a new volume and share that qtree, however this isn't clean, and qtree snapmirror still has to span the filesystem. My other considered option was to use a volume snapmirror and then delete everything but the qtree that I need to keep on the destination volume once it's been split off, however this still leaves me with a cifs share pointing to a qtree instead of a volume. At least it would be a block copy instead of a filesystem copy, though. Anyone have any ideas? Basil

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Lots of low water mark CPs on idle filer
by Edward Rolison 09 Jan '15

09 Jan '15

I've got a set of 4 filers, who have all - pretty much concurrently - decided to start racking up the 'low water mark' consistency points. E.g. wafl_susp -w is clocking up quite quickly, giving me as many as 10/sec. I think this may have caused my filers to get into a tizzy and crash, but I have two more that are still doing it. (I'm not 100% sure, because once they 'came up' the problem is gone ... for now). But anyway - these boxes have very little on them - they're not in service yet, so they only have a couple of vfilers and associated vol0s. So there is -literally- nothing happening, storage wise. The only activity is fairly regular ssh polling for performance stats/usual DFM activity. So can anyone give me a suggestion as to how to check why these might be running out of memory? I can stop the performance collection I guess, but that's been running fine for months. (And is also doing so on around another 40 filer heads, so I don't _think_ it's a problem!) They're 2240-4s, with a single shelf in a HA pair. I have 2 'pairs' (4 controllers) and the two that I've rebooted are fine again. The ones I'm looking at are dev, so I've held off doing so because I'd rather figure out what's going wrong instead.

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what is CMOD command to do "fcp show initiator"
by Iluhes 08 Jan '15

08 Jan '15

Guys, please help"fcp show initiator" in CMOD

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"fcp show initiator" CMOD
by Iluhes 08 Jan '15

08 Jan '15

What the command in CMOD to show "fcp show initiator"

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Cyber Liability and Data Breach insurance Coverage
by Mike Linett 02 Jan '15

02 Jan '15

Hi: We have spoken to our business insurance brokers about cyber liability and data breach insurance and they assure us that our internal storage is covered, but they will not cover data stored in a 'cloud provider' against cyber liability and Data Breach. Has anyone found a commercial insurance package that provides cyber liability and data breach coverage for data located on a commercial service like Salesforce.com? Thanks, Mike Michael Linett Zerowait Corp. 302 996 9408 NetApp and SimplStor hardware, service and support around the world -USA,UK, & Australia 2013 Exporter of the Year

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where are folks planning to migrate their storage spending to in the new year?
by Fletcher Cocquyt 30 Dec '14

30 Dec '14

Happy holidays and 2015! Curious, where are folks planning to migrate their storage spending to in the new year? Here we have new agreements with several cloud vendors - "unlimited cloud storage" - so mgmt's expectation is we somehow stop buying netapp and move to cloud storage. I've had very mixed performance (throughput drops off drastically) and reliability results with initial tests mounting cloud datastores (using rsync to archive server data - anyone had better results?) Given our VMware centric workloads, I'd be leaning towards investing in local, 10G connected server storage with an eye towards VSAN Are there other vendors with a compelling story (SSD/cache) you are considering to migrate to? We are on latest vmware 5.5, ontap 7.1.2 and Dell 620/720 vmware clusters. thanks for any feedback, tips!

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Conflicting Recommendations?
by Philbert Rupkins 30 Dec '14

30 Dec '14

Toasters, It appears the following documents conflict with one another when it comes to recommendations for the value of Net.TcpipHeapMax in ESXi. ---------------------------- *How to configure VMware vSphere 5.x for Data ONTAP 7.3 and 8.x* https://kb.netapp.com/support/index?page=content&id=1013275 Net.TcpipHeapMax For vSphere 5.0/5.1 set 128 For vSphere 5.5 set 512 *TR3749 - NetApp Storage Best Practices for VMWare vSphere* http://www.netapp.com/us/media/tr-3749.pdf "While the NetApp best practice remains to set Net.TcpipHeapMax at the maximum value of 128MB, tests have shown ESXi 5 to be less sensitive to depletion of TCP/IP heap memory." ---------------------------- It seems that TR3749 may be out of date (last update 2011) as it doesnt distinguish between vSphere 5.0/5.1 and 5.5. To my knowledge, the 128MB maximum TCP/IP heap size is applicable to vsphere 5.0 and 5.1. I believe 5.5 increases this maximum to 512MB. I assume the current recommendation for vSphere 5.5 against a filer running ONTAP 8.1.4 7-Mode is 512MB. Can somebody confirm? Is there a best practices doc like TR3749 for vSphere 5.5 in a 7-mode environment? Thanks, Phil

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Re: new cdot NFS vserver. NFS mount point hang on I/O
by Jeff VanDeRyt 22 Dec '14

22 Dec '14

not sure what version you are on, but our fastpath comment reminded me of a entry in the Clustered Data ONTAP® 8.2.1 Release Notes: ---------- Disabling fast path in some networking environments Fast path is enabled by default in all nodes in the cluster. However, you might have to disable fast path in certain environments in which fast path does not function optimally. About this task IP fast path is a mechanism that uses the network interface of an inbound request to send the response quickly by bypassing a routing table lookup. Fast path is enabled by default for all TCP and NFS over UDP connections. You might have to disable fast path if you are working in configurations of Cisco vPC, HP NIC teaming, or asymmetric routing environments. Steps 1. From the nodeshell, enter the following command: options nodescope.reenabledoptions ip.fastpath 2. To disable fast path, enter the following command: options ip.fastpath.enable off For more information, see the bug ID 494396 in Bugs Online on the NetApp Support Site at support.netapp.com/NOW/cgi-bin/bol. ---------- IP Fast path feature is incompatible with some networking environments http://mysupport.netapp.com/NOW/cgi-bin/bol?Type=Detail&Display=494396 ********************************************************** Electronic Mail is not secure, may not be read every day, and should not be used for urgent or sensitive issues

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CIFS and NFS file names
by scl＠virginia.edu 12 Dec '14

12 Dec '14

Hi folks, We recently copied some netapp volumes to a non-netapp file server via NFS and rsync. Unfortunately we have now converted a lot of file names that were created via CIFS on the Netapp using a variety of character sets, such as Arabic, Cyrillic, Persian, etc. As I understand it, a Netapp keeps two file names for each file/folder. The CIFS filename is 16 bit Unicode while the NFS filename is "literal" 8 bit characters (i.e., not UTF-8). I presume that when a file is created on the Netapp via CIFS that the Netapp creates both the CIFS filename and a NFS filename. When we copied the volumes via NFS and rsync, the NFS names were copied over, so we "lost" the CIFS names. Is there any algorithm or procedure that we can use to convert these 8 bit "NFS" names to their equivalent 16 bit Unicode names? Ultimately we need to convert to UTF-8 which is what the destination file server uses for file names (both NFS and CIFS use the same UTF-8 filename). We have turned off CIFS access to the Netapps, and I would like to avoid turning it back on, but I may have no other way to retrieve the original 16 bit unicode names. The Netapp volumes are Unix security style and were accessed both by NFS and CIFS. Some files were originally created via NFS, some by CIFS. And unfortunately, some CIFS filenames had non-English character sets. Here are some sample NFS filenames. I have no idea what the corresponding CIFS filenames are or what character set. :31K4J00 :44O8K00 :5J0TA00 :8QLDT00 :BQLDT00 :EA0IL00 :FA0IL00 These look like the result of a hash, so there may be no way to convert back to CIFS 16bit Unicode. Steve Losen scl(a)virginia.edu

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