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What is the minimum number of shelves for a FAS3220 HA pair?
by Scott Classen 26 Sep '13

26 Sep '13

Hi all, We are considering a FAS3220HA running clustered ONTAP (8.2) with a single DS4246 shelf. However, we were recently informed by our sales people that this is not possible, and that the minimum number of shelves for an HA pair running cDOT was two. Apparently each node needs it's own DS4246 for the cDOT operating system? Is it not possible to split the disks on a single shelf into two aggregates and assign one aggregate to each controller? Confused, Scott

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Optimizing CIFS for WAN Access
by Ray Van Dolson 25 Sep '13

25 Sep '13

Hi all; ONTAP 8.0/8.1 mix. Looking for best practices on optimizing seqential read (throughput) access via CIFS from WAN locations (up to 80ms latency). Here's what I have so far: - Enable SMB 2.0 on filers. - Increase CIFS TCP Window size to ~2MB (default seems to be 17520 bytes)? - Ensure clients at remote sites have either large TCP window sizes set or allow for TCP window scaling (clients are OSX). Obviously some sort of WAN acceleration appliance at the remote site could help as well. Anything I'm missing? Ray

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Remote Power Off and Power On
by Ray Van Dolson 20 Sep '13

20 Sep '13

All -- have a FAS2040C and DS2246 in a remote office where a scheduled power outage is planned for a 48 hour period (longer than UPS runtime at that location). We currently have no on-site staff available. Is it possible to cleanly shut down this device and bring it completely back up via the Service Processor module only? The main piece I'm unsure of is the DS2246. If it uncleanly loses power, will it come back on automatically or does something physically need to be done? Obviously for the controller we can log into the SP and do a 'system power on'. Maybe that command is smart enough to send a signal to the disk shelves as well? Any way to verify disk shelf power status remotely from the SP? Ray

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Recovery options using SM
by Jeff Cleverley 19 Sep '13

19 Sep '13

Greetings, I'm experimenting with DR recovery options on filers running 8.1.2P4, 7-mode. We have 10G connections on all the filers. I wanted to use SM since we get close to 1TB/hr transfer between primary and secondary for SM/SV relationships and we have licenses for this on everything. I can't figure how to get data from the SV secondary back to the primary volume using SM. It won't let me set up a SM on the secondary volume because it is a replication destination. I can't delete the baseline snapshot, and a snapvault stop can take 6 hours or more. Once it completes, the destination qtree is gone and SM won't work. I'm going to look into SnapRestore, but it will require some new licenses for some of the filers. Ndmpcopy seems unstable for 10TB volume transfers and is extremely slow and takes days. Rsync of a volume with 50m files takes days also, partly because the rsync system only has a 1G connection. Thanks, Jeff -- Jeff Cleverley Unix Systems Administrator 4380 Ziegler Road Fort Collins, Colorado 80525 970-288-4611

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Re: The future of OnCommand Core for 7-mode
by Scott Eno 18 Sep '13

18 Sep '13

Thanks Tom and John. This is … unfortunate news. On Sep 17, 2013, at 3:24 AM, De Wit Tom <Tom.DeWit(a)neoria.be> wrote: > Hi Scott, > > I have the same thoughts about that as you, so I contacted the Oncommand Product manager a few months ago. DFM 5.2 will be the last version for 7-mode as this fits in the NetApp strategy of pushing customers to go to clustered ontap. > > DFM 6.0 has been rebuilt from the ground up and will only support clustered ontap, it will never be able to support 7-mode. > > Tom > > > On 17 Sep 2013, at 04:31, Scott Eno <s.eno(a)me.com> wrote: > >> Hi, >> >> With the release of OnCommand Core 6.0 For Clustered OnTap (phew!), has anyone heard about the future of OnCommand Core (henceforth "DFM") for 7-Mode? Are we seeing the end of feature releases for DFM, and 5.2 is now in perpetual maintenance mode like OnTap 7.3.7? I have no plans or reason to transition to cluster mode and certainly won't do it just to get the latest version of DFM, but I do use the crap out of DFM (GUI, CLI, Protection and Provisioning managers, SnapMirror/Vault management, RBAC, controller user account management, controller config management, etc) and, like any other application, it's always got bugs and issues. I hate to think that DFM is at the end of the road unless I go to cluster mode. >> >> Kinda like Microsoft releasing a new version of Office but it only works on a Surface tablet. >> >> --- >> Scott Eno >> _______________________________________________ >> Toasters mailing list >> Toasters(a)teaparty.net >> http://www.teaparty.net/mailman/listinfo/toasters >

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Expected performance difference between two configurations
by Ray Van Dolson 17 Sep '13

17 Sep '13

Hi all; Am trying to understand what sort of performance difference I might see between two different configurations: 1) IBM N6240 E21 (FAS3240C) w/ 120x600GB 15K 3.5" SAS and 512GB of flash cache 2) IBM N6250 E26 w/ 80x900GB 10K 2.5" SAS and 512GB of flash cache. Sorry, on the latter I don't know the equivalent FAS. Probably FAS3250C? We have fewer spindles, but newer, beefier controllers. Our workload is primarily VMware via NFS. Lotsa random reads and writes (more on the read side) with I'd say the bulk of the IO requests in the 64KB+ range. Will I regret going with fewer spindles? Ray

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The future of OnCommand Core for 7-mode
by Scott Eno 17 Sep '13

17 Sep '13

Hi, With the release of OnCommand Core 6.0 For Clustered OnTap (phew!), has anyone heard about the future of OnCommand Core (henceforth "DFM") for 7-Mode? Are we seeing the end of feature releases for DFM, and 5.2 is now in perpetual maintenance mode like OnTap 7.3.7? I have no plans or reason to transition to cluster mode and certainly won't do it just to get the latest version of DFM, but I do use the crap out of DFM (GUI, CLI, Protection and Provisioning managers, SnapMirror/Vault management, RBAC, controller user account management, controller config management, etc) and, like any other application, it's always got bugs and issues. I hate to think that DFM is at the end of the road unless I go to cluster mode. Kinda like Microsoft releasing a new version of Office but it only works on a Surface tablet. --- Scott Eno

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CF Giveback options
by Eric Peng 16 Sep '13

16 Sep '13

Am running ONTAP 8.1.2 P4.. Currently have the following settings enabled: cf.takeover.on_network_interface_failure on cf.takeover.on_network_interface_failure.policy any_nic Want to enable setting: cf.giveback.auto.enable on Was informed by IBM there is a bug where enabling auto CF giveback can conflict with cf.takeover.on_network_interface_failure, and result in the system getting into an infinite loop of takeovers and givebacks. Do most of you leave auto CF giveback disabled as general policy? Eric

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high CP_reads/writes ratio
by Fred Grieco 13 Sep '13

13 Sep '13

What kinds of things can cause a high CP_reads/writes ratio? And what can I do about it? I have an Oracle system with ASM that doing writes in a 15 minute cycle, and it causes a lot of writes with CP reads. The oracle ASM luns are basically the only thing on the aggregate. Disk alignment is fine (which is the first thing I thought of). I've attached a screenshot of the Oncommand graph for one of the disks in this aggr-- not sure if that will come through. The filer is a 3220 with 8.1.2 7-mode. Fibre channel attach, and there are about 20 luns under two volumes. TIA, Fred

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RE: high CP_reads/writes ratioA
by Jordan Slingerland 13 Sep '13

13 Sep '13

At 87% it is certainly possible that wafl doesn't have enough contagious free space to write a chain in a single pass...slowing things down substantially. Are your volumes thick provisioned? That could cloud the equation. --JMS From: Fred Grieco [mailto:fredgrieco@yahoo.com] Sent: Friday, September 13, 2013 3:16 PM To: Jordan Slingerland; Jeff Mohler Cc: Toasters(a)teaparty.net Subject: Re: high CP_reads/writes ratio The prod one is 87%. The replication one is 71% but it was much higher during disaster recovery testing. I'll run a reallocate measure on the DR side this weekend and see what comes back. ________________________________ From: Jordan Slingerland <Jordan.Slingerland(a)independenthealth.com<mailto:Jordan.Slingerland@independenthealth.com>> To: Jeff Mohler <speedtoys.racing(a)gmail.com<mailto:speedtoys.racing@gmail.com>>; Fred Grieco <fredgrieco(a)yahoo.com<mailto:fredgrieco@yahoo.com>> Cc: "Toasters(a)teaparty.net<mailto:Toasters@teaparty.net>" <Toasters(a)teaparty.net<mailto:Toasters@teaparty.net>> Sent: Friday, September 13, 2013 3:12 PM Subject: RE: high CP_reads/writes ratio Are your aggregates more then 65-85% full? From: toasters-bounces(a)teaparty.net<mailto:toasters-bounces@teaparty.net> [mailto:toasters-bounces@teaparty.net] On Behalf Of Jeff Mohler Sent: Friday, September 13, 2013 3:09 PM To: Fred Grieco Cc: Toasters(a)teaparty.net<mailto:Toasters@teaparty.net> Subject: Re: high CP_reads/writes ratio Wafl free space fragmentation most likely. Reallocate all volumes in the affected aggregate. Do not reallocate the _aggregate_. Sent from my iPhone On Sep 13, 2013, at 1:06 PM, Fred Grieco <fredgrieco(a)yahoo.com<mailto:fredgrieco@yahoo.com>> wrote: What kinds of things can cause a high CP_reads/writes ratio? And what can I do about it? I have an Oracle system with ASM that doing writes in a 15 minute cycle, and it causes a lot of writes with CP reads. The oracle ASM luns are basically the only thing on the aggregate. Disk alignment is fine (which is the first thing I thought of). I've attached a screenshot of the Oncommand graph for one of the disks in this aggr-- not sure if that will come through. The filer is a 3220 with 8.1.2 7-mode. Fibre channel attach, and there are about 20 luns under two volumes. TIA, Fred _______________________________________________ Toasters mailing list Toasters(a)teaparty.net<mailto:Toasters@teaparty.net> http://www.teaparty.net/mailman/listinfo/toasters

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