About aborzenkov

aborzenkov · ‎2011-01-07

Multi VIF offers some limited load balancing, but it is really effective only with large number of clients. You may consider iSCSI which does multipath and load balancing.

aborzenkov · ‎2011-01-07

NetApp will shut down if degraded RG is not repaired within raid.timeout timeframe. It is to protect you from further disk failures. It is described in Data ONTAP manuals.

aborzenkov · ‎2011-01-07

Tr-3805 is “SnapManager 1.0 for Hyper-V Best Practices” as long as I can believe NetApp site ☺ May be you could just post a link to this TR?

aborzenkov · ‎2011-01-07

Mostly yes, but do not forget about raid.timeout option. I learned about it hard way when my very first NetApp suddenly started to switch off ☺

aborzenkov · ‎2011-01-07

Yes, system will complaint but run. In some cases it is possible to turn warnings off - see raid.min_spare_count option. Similar posts: http://communities.netapp.com/message/45564#45564 http://communities.netapp.com/message/32426#32426 http://communities.netapp.com/message/42579#42579

aborzenkov · ‎2011-01-07

No. VIF is per-controller only.

aborzenkov · ‎2011-01-07

Look at tr-3749 “NetApp and VMware vSphere Storage Best Pratices”.

aborzenkov · ‎2011-01-06

Various replacement procedures are described on NOW site. I really can’t say which is the best. In similar situation several years ago customer opted for hot standby with 2 disks in RAID4 for root and no spares on one controller, but they were 72GB disks; I guess you would not like to lose 4TB worth of space. If you do not absolutely need large contiguous chunk your suggestion looks reasonable; although I’d rather go for RAID_DP without spares. Search communities, this question pops up pretty often and there were several long threads about it already.

aborzenkov · ‎2011-01-06

To allow failover between heads in active/active pair each head must be up and running; and to be able to run, each head needs at least root volume. Your configuration leaves second head as cold spare. It could be acceptable if you can afford downtime for replacement (I had customers with single FAS250 or R200), but it is pretty expensive spares stock IMHO.

aborzenkov · ‎2011-01-06

You need to change Storage Solution (Search Criteria frame on the top) to Virtual Storage Console; default is SAN.

aborzenkov · ‎2011-01-06

According to IMT VSC 2.0.1 is compatible with vCenter 4.1.

aborzenkov · ‎2011-01-05

You could ndmpcopy the data up a level out of the qtree or copy it out if you want the same structure. It is better move than copy. Copy will require double amount of space, and move is quite cheap and fast (as long as number of top level directory entries is reasonable).

aborzenkov · ‎2011-01-05

Tr-3808 is “VMware vSphere and ESX 3.5 Multiprotocol Performance”. Is it the correct number?

aborzenkov · ‎2011-01-05

You can leave it this way.

aborzenkov · ‎2011-01-05

You are correct, that is why you need to remove ownership from some disks to make them available for second controller before starting installation. You already mentioned this in your original post.

aborzenkov · ‎2011-01-05

What could work – pack necessary files as zip (relative to /etc) and use “software install” to unzip this file on filer. Theoretically, ndmpcopy from another system may work as well (I believe there are free implementations on ndmp.org).

aborzenkov · ‎2011-01-05

1. You can use any drives in any shelf. The document tells you to disable auto-assign on existing controller – otherwise it may happen that when you remove ownership controller will re-assign it back (I do not remember scan frequency, I think it is around 5 minutes). 2. As long as you won’t remove ownership from any disk that is part of aggregate your existing data should be OK 3. I am not sure I understand the question. To reassign disks you need to know sysid of new controller. If you have this information, you could reassign them.

aborzenkov · ‎2011-01-04

So this implies that in MetroCluster I am forced to either use IOXM or use two cluster pairs? Somehow this was not made very obvious in available docs. Does it mean that FAS3200 chassis has hard coded system type including presence of IOXM?

aborzenkov · ‎2011-01-04

No, it is not possible. What could be done – temporary loan shelf, install larger disks, copy data over (ndmpcopy, vol copy, SnapMirror – whatever is available) and then install disks back in original shelf. This obviously requires some downtime.

aborzenkov · ‎2011-01-04

Yes, you need NDMP license for NetWorker to utilize NDMP backup (i.e. direct to tape or over network to DSA). License is per filer and tiered. Whether backup via CIFS shares is OK depends on your requirements, such as backup window, LAN speed etc. NDMP is likely to be faster even if run over network, due to streaming nature. Also keep in mind, that when backing up via CIFS shares files will be indexed under server that mounted share, not under filer name. But for 120TB of storage I’d seriously consider alternative approach like SnapVault. You can enable NDMP on filer at any time, it should not affect anything.

aborzenkov · ‎2011-01-03

You can use limited scripting on NetApp; see “source” command. So you could create script, place it on NetApp and execute there; it is probably faster than executing 400 commands using remote API/ssh one by one.

aborzenkov · ‎2011-01-01

I became curious and tried to check some well known vendors. I failed to find any Twinax interoperability statement on Brocade site. As for Cisco, it explicitly supports Twinax cables from multiple vendors (see as example http://www.cisco.com/en/US/prod/collateral/switches/ps9441/ps10110/data_sheet_c78-568589.html) as well as offering reasonable support for non-certified cables. Be sure to check the compatibility guide Would you please provide a link to NetApp compatibility guide for Twinax cables?

aborzenkov · ‎2011-01-01

I am listening training FAS3200 Series Troubleshooting and slide 15 of module 1 has quite interesting statement: the switch and cable must come from the same vendor Is it really hard requirement? Is it specified anywhere else? Ot is it just my English (I interpret "must" as hard requirement; while slide itself is titled "Best practices", so IMHO "should" would be more appropriate).

aborzenkov · ‎2010-12-28

Please see 7.3.5 Active/Active configuration guide: You can configure two stretch MetroClusters between a pair of single enclosure active/active configuration systems. In this configuration, the active/active configuration between the two controllers in each chassis is deactivated, and two separate, side-by-side stretch MetroClusters are formed between the four controllers. To implement the stretch MetroCluster, you must install an FC-VI adapter in each controller to provide the cluster interconnect between the systems. When the FC-VI adapter is installed in the system, the internal InfiniBand interconnect is automatically disabled. This is different from other stretch MetroClusters, which use NVRAM adapters to provide the interconnect. The FC-VI adapter is the only difference between standard active/active and stretched MC. If you do not have these adapters, you can get standard HA only anyway. If you disable HA you won’t have any cluster, neither local, nor metro ☺

aborzenkov · ‎2010-12-21

It may be possible to use reallocate -p for physical reallocation ... but I may be it makes sense at least try to contact NetApp support for their comments. In any case, if you will resolve this issue I appreciate if you post summary here. Thank you in advance!

Re: NetApp FAS2040-R5 as NFS Server for ESX 3.5

Re: RG Size 2TB Disks

Re: NetApp FAS2040-R5 as NFS Server for ESX 3.5

Re: RG Size 2TB Disks

Re: RG Size 2TB Disks

Re: NetApp FAS2040-R5 as NFS Server for ESX 3.5

Re: NetApp FAS2040-R5 as NFS Server for ESX 3.5

Re: RG Size 2TB Disks

Re: RG Size 2TB Disks

Re: Virtual Storage Console 2.0.1 and vCenter 4.1?

Re: Virtual Storage Console 2.0.1 and vCenter 4.1?

Re: snapmirror or ndmp

Re: VIF and 802.1q trunk

Re: Adding a Second Controller to a FAS3140

Re: Adding a Second Controller to a FAS3140

Re: Create a directory through CLI ONTAP 7.x

Re: Adding a Second Controller to a FAS3140

Re: Can I upgrade a FAS3200 to add an I/O Expansion Module (IOXM) after a system has been installed ...

Re: Swapping one size of disks for larger ones

Re: NDMP in netapp FAS 3140

Re: Running 400 commands within the commandline

Re: Must 10G Twinax cable and switch really come from the same vendor?

Must 10G Twinax cable and switch really come from the same vendor?

Re: FAS3210 MetroCluster

Re: Verify on SnapVault secondary gets slower every month