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13513 discussions

volume move and SFO
by Ian Ehrenwald 10 Aug '18

10 Aug '18

Good morning I have a four node cluster, nodes1/2 are SAS/SATA and nodes 3/4 are AFF. I have a long running volume move going from node 1 to node 4. Long running, like 30TB+, and it's about 60% done. I need to do some hardware maintenance on nodes 1 and 2 tomorrow evening (install additional FlashCache cards). Will a takeover of node 2 by node 1, then a takeover of node 1 by node 2, interrupt this volume move? I can't seem to find much in the way of documentation about what happens during a SFO and a volume move, but it's possible I'm just not looking hard enough. Thanks for any insights. Ian Ehrenwald Senior Infrastructure Engineer Hachette Book Group, Inc. 1.617.263.1948 / ian.ehrenwald(a)hbgusa.com

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Retrieving lock status in cDOT (CIFS/NFSv4)
by Jacek 08 Aug '18

08 Aug '18

We implemented simple file lock monitoring on our 7mode filers: A script runs each 5 minutes retrieving output from lock status -n command from all vfilers. For example: # ssh [...] vfiler run sngnas100703 lock status -n CIFS: 0 share locks, 0 byte locks [...] NFSV4: 29 share locks, 5 byte locks [...] Total Locks: 29 share locks, 5 byte locks [...] We would like to implement equivalent solution for cDOT but there is no command returning lock status summary (all we need is to count share and byte locks per protocol: CIFS and NFSv4). cDOT documentation and NetApp support suggest using command: vserver locks show But: Command warns that it may affect system performance and we will query clusters each couple of minutes. The script will have to retrieve huge output, parse it and calculate required totals. What is the best and non-intrusive way to retrieve locks status? (other commands? API?) Best regards, Jacek Nogala

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wafl.vol.walloc.rsv.failmount
by Mike Thompson 08 Aug '18

08 Aug '18

Looks like we filled up an aggregate that we dump backups into. Filer bounced itself, to take the aggregate offline, which is an interesting way to deal with the situation: Aug 6 01:39:46 filer1b [filer1b:wafl.vol.walloc.rsv.offline:error]: Volume backups free space reserve is critically low. Rebooting system to take volume offline. Please contact support for assistance. Anyway, the aggr is in restricted state now, and when I try to online it, event log says: 8/7/2018 08:43:46 filer1b WARNING wafl.vol.walloc.rsv.failmount: Failing mount of volume backups. Free space reserve is too low. Please contact support for assistance. I'd really like to not have to blow this aggr away and re-run all these backups. Presumably there's a way to get this back online. This is on cdot 8.2.4p4 Any ideas?

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Re: SnapMirror Bi-directional possible?
by Michael Bergman 26 Jul '18

26 Jul '18

On 2018-07-24 23:35, Scott M Gelb via Toasters wrote: > For the same data set, bi-directional, you might want to POC Peer Software. > They PeerSync bi-directional and also have PeerLink which locks files on > either side while keeping in sync. FPOLICY is used for real time event > notification without file scans. Locks files... Well, if you can live with that, then *maybe* it's viable. But cumbersome and slow. Now, in many use cases w.r.t. NFS (which is what is used by the Applications to *do* something with that data right?) the problems which such locking incur can be devastating in practice. If it's just some ppl browsing files manually, then sure -- go ahead. But with many heavy application systems it's just not acceptable. So the whole things falls over in any case. This might not be detectable in a PoC; race conditions. It's a bogmire of ifs and buts. In a way normal one-directional SM also "locks" (or rather, makes not-available) files and dirs in the RO target volume. In a certain way. So if you run applications intensely on the RO copy (target FlexVol) via NFS there is always a short moment when inodes are shifted at the updates. This is absolutely unavoidable, but what will happen to the App is then 'Stale NFS file handle'. Ka-boom. So then you go into the complexity of trying to asynchronously time the app chain to not run (in certain ways at least) at the exact second(s) this shift inside the inode structure happens. And then you give up. Been there, done that. /M

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mirror one volume read/write across snapmirror?
by John Stoffel 26 Jul '18

26 Jul '18

>>>>> "Scott" == Scott M Gelb via Toasters <toasters(a)teaparty.net> writes: Scott> From: Scott M Gelb <scottgelb(a)yahoo.com> Scott> To: "toasters(a)teaparty.net" <toasters(a)teaparty.net>, Eric Peng <epeng(a)esri.com> Scott> Date: Tue, 24 Jul 2018 21:34:46 +0000 (UTC) Scott> Subject: Re: SnapMirror Bi-directional possible? Scott> For the same data set, bi-directional, you might want to POC Peer Software. Scott> They PeerSync bi-directional and also have PeerLink which locks files on either Scott> side while keeping in sync. FPOLICY is used for real time event notification Scott> without file scans. And from my experience with fpolicy and CommVault for HSM (Archiving of old files) it's fragile as all hell and not reliable. When fpolicy goes down... all hell will break loose. And what happens when you have two different people editing the same file at seperate sites? Last edit wins? This way lies sanity... you need a cluster aware filesystems. Of course people will point out that you have the same problem with NFS if you edit the same file from two seperate clients at the same site. It just silently uses the last one to write is the answer. But for remote sites with fpolicy, I'm sure it will be even more fragile. John

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Max volume count per node
by Alexander Griesser 26 Jul '18

26 Jul '18

Hey there, does anyone know what the real implication of the max volume count per node setting on the FAS systems is good for? Is there any chance that this limit gets raised on newer OnTap releases or is there any secret flag to raise it (knowing that support would not want to see that)? Best, Alexander Griesser Head of Systems Operations ANEXIA Internetdienstleistungs GmbH E-Mail: AGriesser(a)anexia-it.com<mailto:AGriesser@anexia-it.com> Web: http://www.anexia-it.com<http://www.anexia-it.com/> Anschrift Hauptsitz Klagenfurt: Feldkirchnerstraße 140, 9020 Klagenfurt Geschäftsführer: Alexander Windbichler Firmenbuch: FN 289918a | Gerichtsstand: Klagenfurt | UID-Nummer: AT U63216601

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Re: SnapMirror Bi-directional possible?
by Klise, Steve 24 Jul '18

24 Jul '18

You can also look at somthing like DFS or a global name space like panzura. I believe they can do multiple copies but have some hardware requirements. On July 24, 2018 at 4:40:09 PM PDT, Mike Gossett <cmgossett(a)gmail.com> wrote: You could look at metrocluster, potentially Sent from my mobile phone > On Jul 24, 2018, at 5:53 PM, Eric Peng <epeng(a)esri.com> wrote: > > Thanks all, for confirming that bi-directional SnapMirror on the *same* volume is not possible. We're still in the requirements gathering/planning part of the project, so we have some time to figure this out. This would be for keeping user profiles in sync between 2 different sites. I may take a look at that PeerSync software. > > Eric > > -----Original Message----- > From: toasters-bounces(a)teaparty.net [mailto:toasters-bounces@teaparty.net] On Behalf Of Michael Bergman > Sent: Tuesday, July 24, 2018 3:07 PM > To: Toasters <toasters(a)teaparty.net> > Subject: Re: SnapMirror Bi-directional possible? > >> On 2018-07-24 23:35, Scott M Gelb via Toasters wrote: >> For the same data set, bi-directional, you might want to POC Peer Software. >> They PeerSync bi-directional and also have PeerLink which locks files >> on either side while keeping in sync. FPOLICY is used for real time >> event notification without file scans. > > Locks files... Well, if you can live with that, then *maybe* it's viable. > > But cumbersome and slow. Now, in many use cases w.r.t. NFS (which is what is used by the Applications to *do* something with that data right?) the problems which such locking incur can be devastating in practice. If it's just some ppl browsing files manually, then sure -- go ahead. > > But with many heavy application systems it's just not acceptable. So the whole things falls over in any case. This might not be detectable in a PoC; race conditions. It's a bogmire of ifs and buts. > > In a way normal one-directional SM also "locks" (or rather, makes > not-available) files and dirs in the RO target volume. In a certain way. So if you run applications intensely on the RO copy (target FlexVol) via NFS there is always a short moment when inodes are shifted at the updates. This is absolutely unavoidable, but what will happen to the App is then 'Stale NFS file handle'. Ka-boom. So then you go into the complexity of trying to asynchronously time the app chain to not run (in certain ways at least) at the exact second(s) this shift inside the inode structure happens. > > And then you give up. Been there, done that. > > /M > _______________________________________________ > Toasters mailing list > Toasters(a)teaparty.net > https://urldefense.proofpoint.com/v2/url?u=http-3A__www.teaparty.net_mailma… > > _______________________________________________ > Toasters mailing list > Toasters(a)teaparty.net > http://www.teaparty.net/mailman/listinfo/toasters _______________________________________________ Toasters mailing list Toasters(a)teaparty.net http://www.teaparty.net/mailman/listinfo/toasters

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SnapMirror Bi-directional possible?
by Eric Peng 24 Jul '18

24 Jul '18

Just wanted to do a quick sanity check, is there any way to have SnapMirror replication go both directions between sites? We are running cDOT 9.x at both locations. I came across some older posts (several years ago) that seem to indicate that bi-directional snapmirror would not be possible. Just wondering if this might have changed with cDOT 9.x capabilities? Thanks, Eric

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Mac OS X, SMB NTFS, and chmod/chown
by Ehrenwald, Ian 12 Jul '18

12 Jul '18

Hello I have users on Mac OS X that are unable to uncompress zip files in SMB shares which sit on top of NTFS security style volumes. I hadn't heard of this problem until I started migrating my users to new shares, previously they were all on UNIX security style volumes. If I am understanding my users correctly, they can reliably reproduce this problem this way: - In Finder, right click on a folder on a share, select Compress - Zip file is created successfully on share - Double click on Zip file that was created - Mac OS X archiver utility pops up an error box, "Unable to expand (zip name) into (target dir). (Error 13 - Permission denied). Examining the Zip file from the command line shows that it is a fully formed file, no corruption, etc. When I attempt to uncompress the Zip file using the command line on the same machine that created it, I can see that unzip is attempting to chmod the files and directories and getting a Permission Denied error back from the svm. Output: UserMachine:z TheUser$ unzip 3\:14\:18.zip Archive: 3:14:18.zip creating: 3:14:18/ chmod (directory attributes) error: Permission denied inflating: 3:14:18/FileNameXYZ.FC3.idml fchmod (file attributes) error: Permission denied creating: __MACOSX/ chmod (directory attributes) error: Permission denied creating: __MACOSX/3:14:18/ chmod (directory attributes) error: Permission denied inflating: __MACOSX/3:14:18/._FileNameXYZ.FC3.idml fchmod (file attributes) error: Permission denied inflating: 3:14:18/FileNameABC.ai fchmod (file attributes) error: Permission denied inflating: __MACOSX/3:14:18/._FileNameABC.ai fchmod (file attributes) error: Permission denied inflating: 3:14:18/FileNameLMN.png fchmod (file attributes) error: Permission denied inflating: __MACOSX/3:14:18/._FileNameLMN.png fchmod (file attributes) error: Permission denied inflating: 3:14:18/FileNameXYZ.FC3.indd fchmod (file attributes) error: Permission denied inflating: __MACOSX/3:14:18/._FileNameXYZ.FC3.indd fchmod (file attributes) error: Permission denied warning: cannot set permissions for __MACOSX/3:14:18/ Permission denied warning: set times/attribs failed for __MACOSX/3:14:18/ warning: cannot set permissions for __MACOSX/ Permission denied warning: set times/attribs failed for __MACOSX/ warning: cannot set permissions for 3:14:18/ Permission denied warning: set times/attribs failed for 3:14:18/ UserMachine:z TheUser$ This does make sense, since SMB/CIFS doesn't really understand UNIX ownership and attributes. Is the solution setting the security style of the volume to Mixed? Reading in detail about it at https://whyistheinternetbroken.wordpress.com/2017/01/24/mixed-perceptions-m… makes it seem like that's the right path to follow, but before I start down that trail I wanted to see what other people have done in this situation. Thanks for your help. Ian Ehrenwald Senior Infrastructure Engineer Hachette Book Group, Inc. 1.617.263.1948 / ian.ehrenwald(a)hbgusa.com This may contain confidential material. If you are not an intended recipient, please notify the sender, delete immediately, and understand that no disclosure or reliance on the information herein is permitted. Hachette Book Group may monitor email to and from our network.

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How to resolve LUN misalignment?
by Chris Hague 25 Jun '18

25 Jun '18

Showing Alignment: misaligned on a large LUN which has been 7MTT migrated. Looking for a procedure for ONTAP 9.1, all articles seem to be for 7-Mode. Can anyone in this group offer any advice? This email is being sent by a subsidiary of Arthur J. Gallagher Holdings (UK) Limited, part of the Arthur J. Gallagher & Co. global group of companies. For details of the registered office, company number and, where applicable, regulated status of our subsidiaries, please visit https://www.ajginternational.com/legal-regulatory-information/. We are the data controller of any personal information you provide to us or personal information that has been provided to us by a third party. We collect and process information about you in order to arrange insurance policies and to process claims. Your information is also used for business purposes such as fraud prevention and detection and financial management. This may involve sharing your information with third parties such as insurers, reinsurers, other brokers, claims handlers, loss adjusters, credit reference agencies, service providers, professional advisors, our regulators, police and government agencies or fraud prevention agencies. We may record telephone calls to help us monitor and improve the service we provide. For further information on how your information is used and your rights in relation to your information please see our privacy notice at https://www.ajginternational.com/Privacy-Policy/. If you are providing personal data of another individual to us, you must tell them you are providing their information to us and show them a copy of this notice. Where you are obtaining a non-consumer policy of (re)insurance, or cover for additional risks or renewal under an existing policy, you are required to make a fair presentation of the risk to a (re)insurer which discloses every material circumstance which you know or ought to know relating to the risk to be insured. A circumstance is material if it would influence the judgment of a prudent insurer in determining whether to provide insurance for the risk and, if so, on what terms. Disclosure must be reasonably clear and accessible to a prudent insurer and made in good faith. The aforementioned duty of disclosure is the applicable duty under the laws of England and Wales. If your policy is not subject to English law you are expected to disclose risk information in accordance with the requirements of the applicable law. In such circumstances we expect you will disclose risk information at least equal to the standard required under English law and where the applicable law requires you to disclose information over and above the level required under English law you will provide such information in accordance with that law. Where you are obtaining a consumer policy of insurance, you must read each question and answer honestly and fully and must take reasonable care to not make a misrepresentation. Failure to comply with the above disclosure requirements, as they apply to you, could mean that your policy of (re)insurance is void, its terms are materially altered or that (re)insurers are not liable to pay all or part of your claim(s). If you are in any doubt as to your obligations you should ask your usual contact. This e-mail and any attachments are CONFIDENTIAL and may contain legally privileged information. If you are not the intended recipient of this e-mail message, please telephone or e-mail us immediately, delete this message from your system and do not read, copy, distribute, disclose or otherwise use this e-mail message and any attachments. Although the above company has taken reasonable precautions to ensure this e-mail and any attachments are free of any virus or other defect that may affect your computer, it is the responsibility of the recipient to ensure that it is virus free and the above company does not accept any responsibility for any loss or damage arising in any way from its use.

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