toasters March 2012

toasters@lists.teaparty.net

44 participants
23 discussions

Strange error when running autosupport.doit
by Dan Finn 16 Mar '12

16 Mar '12

I noticed that when I run an autosupport.doit I get the following error: Thu Mar 15 15:39:16 MDT [na04: asup.general.file.create.failed:error]: AutoSupport file (/mroot/etc/log/.cm_stats_hourly_done) was unable to be written to the file spool subdirectory. But the autosupport email still makes it out and looks good. I deleted everything under /etc/log/autosupport and I also tested that I could create the file that is mentioned in the error manually as root, no issues there. Anyone else ever seen this before?

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vfiler root IO and performance across aggregates?
by Randy Rue 15 Mar '12

15 Mar '12

Hello All, We're about to spin up a new 3240 active/passive HA pair with a few hundred SATA disks divided into five aggregates for best RAID distribution and overall IOps. We'll be serving up NFS data from a dozen or two volumes, divided across the aggregates for roughly even capacity and IO load. For clarity of management and to ease any possible portability issues later I like the idea of running all of this under a vfiler. Got a few questions first, however. Do I create any CPU/RAM bottleneck by putting all of this under one vfiler? For example, would I be forcing otherwise multi-threaded processes onto one CPU? (Oh, we're running 8.0.2P5 in 7-mode, BTW) I have to put the root volume for that vfiler on one of those aggregates. Will heavy processing traffic cause heavier disk IO to the aggregate housing the root? Or is the vfiler root held in RAM? Seems like it could be and would be a good idea to do it that way. In either case, seems like it would make sense to put the vfiler root on aggr0, which uses up three disks to create 1.25TB and otherwise only contains the physical filer's root. Any other considerations I should know about? Hope to hear from you, Randy

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migrate a vfiler between different HA clusters?
by Randy Rue 13 Mar '12

13 Mar '12

Hello All, We have a vfiler "x" currently sitting on one node of a v3170 HA pair. We want to move it to a new 3240 HA pair. Looks like the automagic tools that NetApp offers for this can't work for us because a) the destination filer has less NVRAM than the source, and b) the source is at 7.3.5 and the destination 8.0.2. We could create a new vfiler on the destination and snapmirror every volume. But we don't use qtrees. There are default qtrees on the dozen or two volumes on the source vfiler, but these can't be snapmirrored to the destinations as (if I understand this correctly) directly as the snapmirror process first deletes the destination qtree and then recreates it. And if you delete the default qtree (qtree0) for a volume you delete the volume. In other words, this path would require we create a qtree below the default and end up with an added folder in the path of the copied destination folder, and need to touch every client that connects to the export. The new HA pair is in a different subnet than the source. So the IP address of the vfiler will change. But ideally nothing else should. Anybody got any ideas for how to do this short of creating a new vfiler from scratch and using rsync to move all the data via NFS? RE-assigning DNS names and AD memberships during a switchover outage?

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DNS server failover timeout.
by Jeff Cleverley 12 Mar '12

12 Mar '12

Greetings, I can't find anything useful regarding DNS server entries in resolv.conf. The main filers in question are 7.3.5.1P4. We had the first DNS server in resolv.conf go down unexpectedly. The filers did not timeout the first server and go to the secondary in a timely manner. I was able to edit the resolv.conf files and rotate the order to get things happy again. This leads me to 2 questions: 1. Is there an option to set the DNS lookup timeout so that it goes to the next server in the list? 2. Does anyone know the default timeout before the filer goes to the next server in the list? Thanks, Jeff -- Jeff Cleverley Unix Systems Administrator 4380 Ziegler Road Fort Collins, Colorado 80525 970-288-4611

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Aggregate Committed Capacity in OpsMgr/DFM/Oncommand Console
by Fred Grieco 12 Mar '12

12 Mar '12

How is the "Aggregate Committed Space" calculated in DFM/OpsMgr, and can it be adjusted? The Aggregate Committed Space that I see in DFM is always seemingly too high, and this has been true in many version. When I add up the volume committed space in the volumes contained, add the aggregate reserve space, and divide by the total aggregate space, the percent is always lower than what DFM says by about 5%. Where do they get their number? Am I missing something? TIA, Fred

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c-mode how to set NDMP blocking factor
by Mike Thompson 09 Mar '12

09 Mar '12

Hey all, I'm trying to increase performance of fiber channel NDMP backups we have going to a remote tape robot (bridged over WAN via some Cienna gear). I would like to try increasing the blocking factor that the filer uses when writing to tape over NDMP. I'm running Ontap 8.0.1 c-mode, with NetBackup 6.5. None of the docs explain how to do this, but there is mention of blocking factor in the Data Protection manual. All it says is that block size up to 256KB is supported, and that the variable MOVER_RECORD_SIZE is what controls that. It appears that you can send variable settings to NDMP by using 'set variable=value' at the top of your includes list in the backup policy in NetBackup. I have tried putting 'set MOVER_RECORD_SIZE=256' at the top of my includes list, and running the job, but I get this in the /mroot/etc/mlog/ndmpd.log: INFO: Pass through of unknown START BACKUP variable MOVER_RECORD_SIZE with value 256 I have also tried setting the variable DATA_BLOCK_SIZE, but get the same result. So the question is, how do I set the blocking factor for NDMP backups?

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HbaPortToIomSquares_Alert
by Jon Bousselot 09 Mar '12

09 Mar '12

I've seen this message on two different filers now, a 2040 and a 3140 with multiple DS4243 shelves. It only shows up during a reboot, and I'm not finding anything on the NOW site. Both systems are running 8.1RC2. Any one else seeing this? -Jon Subject: HA Group Notification from filer01 (SAS Connectivity Monitor: HbaPortToIomSquares_Alert[2c]) WARNING

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user quota management.....by users
by Kennedy, Jeffrey 07 Mar '12

07 Mar '12

Has anyone come across, or developed, a utility to allow non-privileged users to manage user quotas on 7G? The situation is a need to allow certain leads the ability to manage user quotas for specific file systems only. Not so much the default user quota but unique quotas. Thanks. Jeff Kennedy Qualcomm, Incorporated QCT Engineering Compute 858-651-6592

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DFM migration.
by Jeff Cleverley 06 Mar '12

06 Mar '12

Greetings, I need to change the hardware and OS for my current 3.7 DFM server. I've set up another box with the new OS and installed the 4.0.2 release. I have successfully imported (AFAIK) a copy of the old database. I am not the primary user of DFM and would like to have the primary user be able to do some testing and looking around before trying to make a more permanent switch. My concern is having 2 instances of DFM trying to run backups, purge snapshots, etc. The new host name is not listed in hosts.equiv and it doesn't have ssh keys on filers. There are no entries for the ndmp credentials. Will having 2 of these online cause a problem? If so, what is the best way to have the second one online in more of a read-only/browse type mode? For those who will ask, I'm not going straight to OnCommand yet because I don't know enough about it yet. There are also several packages that seem to only run on Windows, and some that mention only running on 32 bit OS and hardware. We are primarily a linux lab and I don't want to have to set up a Windows server or have to go to Goodwill and try to find a 32 bit server :-) Jeff -- Jeff Cleverley Unix Systems Administrator 4380 Ziegler Road Fort Collins, Colorado 80525 970-288-4611

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Experience with Backup Software using NDMP
by Steffen Knauf 04 Mar '12

04 Mar '12

Hi Toasters, we consider to buy a new Backup Software and i don't know whats the best Software. Now, we are using Netvault (vian ndmp)but it don't works very well (e.g. problems with deduplication.....). We backup ~ 10 TB via NDMP to a LTO 5 Tapelibrary. Perhaps someone have experience with other Backup Software. Netvault sucks generally ;( greets Steffen

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toasters March 2012