How do you improve the performance in Netapp?

- Move the volume from lower tier to higher tier
- Configure vif if possible
- Keep free space 10% on Volume/Aggr level
- Schedule scrubbing and deduplication activities after office hours
- Avoid backup from production filer
- Avoid connecting different types of shelves is a same loop
- Avoid mixing of different types of disks in same aggregate
- Keep the version of ONTAP advised by Netapp


How do you create qtree?

- qtree create /vol/vol1/qtreename

Qtree created but the users are unable to access. How do you resolve this?
For CIFS
- Check the correct ACL is given
- Check the security style is ntfs
For NFS
- Check the /etc/exports file is correctly updated with the qtree
- Check the qtree is correclty exported

How to copy data from filer to filer?

- ndmpcopy or snapmirror

Where the quotas can be applied?
Quotas can be applied on user/group/qtrees

How do you change quotas?
Change the value in /etc/quotas file and run quota resize for the volume or qtree

What are the contents of the quota file?
- Quota target(User/Group/Volume/qtree
- Type(user/User@volume/tree)
- disk(size in M)
- Files(in xxK)
- thold(Threshold)
- sdisk(soft disk limit)
- sfile(soft files limit)

What is the order of quotas applied?

- tree quota for that tree
- User qouta for that user that owns the file on the volume
- Group quota for the group that owns the file on the volume
- The user quota for the user that owns the file on the qtree
- The group quota for the group that owns the file on the qtree

What happens to the quotas when the volumes moved between vfilers?

Quotas are disabled

How do you resize the aggregate?

aggr add aggrname disks


What is the default snap reserve for aggregate?

5%


What are the differences of the vol copy and ndmpcopy?

- vol copy uses snapshot, ndmpcopy uses snapshot but the snapshot will be deleted after the copy
- vol copy requires rsh, ndmpcopy doesn't
- vol copy requires destination need to be restricted, ndmpcopy doesn't
- vol copy requires the destination is same type as source(Traditional/Flex), ndmpcopy doesn't
- vol copy requires the destination is same size or biggger, ndmpcopy doesn't
- vol copy can not copy directory level, ndmp can copy

What are the RAIDs supported by Netapp?

- RAID4
- RAID-DP
What is RAID DP and how does it works?

RAID-DP is RAID double parity, which provides data protection up to two disk failures

In addition to the horizantal parity on a disk, a diagonal parity is created on another disk.

What is oplocks?

- They reduce network traffic and increase storage performance through client side caching of read-ahead, write behind and lock information
- When other client need to access the same file, the first client has to release the oplock and access to the file. All the modified data need to be flushed to the disk and access will be provided to the other client

- Not sutable for database applications and critical data that cannot affort for slight data loss


How do you configure snapvault?

- On Primary Filer 

license add licensekey

options snapvault.enable on

**** Allow the secondary filer for snapvault

options snapvault.access host=2ndFiler

- On Secondary Filer 

license add licensekey

options snapvault.enable on

***** Enable the compliance clock

date -c initialize

*****For initial backup

snapvault start -S source:/vol/vol1/qtree   /vol/sv_vol1/qtree


***** check status

snapvault status


***** Create schedule on both filers

- On primary filer, add schedule to create snapshots Monday to Saturday at midnight and keep maximum 30 snapshots

snapvault snap sched -x source:/vol/vol1/qtree sv_daily 30@mon_sat 0

- On Secondary filer, add schedule to create snapshots Monday to Saturday at midnight and keep maximum 30 snapshots

snapvault snap sched -x destination:/vol/sv_vol1/qtree sv_daily 30@mon_sat 0


How do you requlate the speed of the snapmirror?

- on both source and destination 
options replication.throttle.incoming.max_kbs unlimited/xxxxx

or it can be throttle by snapmirror command for each snapmirror/snapvault session specifying -k xxx (kilobytes per second)

What is WFA?

OnCommand Workflow Automation is a tool from netapp to automate storage management tasks like provisioning, decommissioning etc. 

What is vif and how do you create them?

vif is virtual interface, used to be created with vif command now replaced with ifgrp.
virtual interfaces can be created as single, multi,lacp mode
Single means the the physical interfaces are active passive
Multi means all the physical interface are active, should be connected to the same switch and the ports on the switch have to be trunked. 
lacp means the physical interface are active, can be connected to the multiple switches, the switch should be supporting LACP


What is the default space reserved for snapshots for the volume?

- 20% of the volume size

How to find the failed disks? 

- aggr status -f
- vol status -f
- sysconfig -d


How do you resize a snapmirrored volume? 

- First increase the size on the destination side and increase on source side

How do you enable deduplication? 

sis on /vol/volname
sis start -s /vol/volname
sis config -s sun-sat@22 /vol/volname
sis status


How to check the space savings of deduplication?

df -s -g

Disaster happened, the DR filer is production now. All the clients writing to the DR filer. The rpoduction filer is recovered, How do you get make the production available with the data written at destination? 

- If Source:volA is recoverable, the snapshot is available, use the snapmirror resync command on Source filer to resynchronize Source with Destination.


snapmirror resync -S Destination:VolB Source:volA

snapmirror update -S Destination:volB Source:volA

snapmirror break volA

- On destination filer run the below command to keep prod volume sync with DR
snapmirror resync volB



------ Storage failover command






Roles and responsibilities of Netapp admin

Level 1 tasks
•We are doing remote support. 
•Checking the storage critical Events. 
•Checking the status of aggregate and volume usage using DFM. 
•Checking the ticketing tool and mails.
•Performing Daily health check to monitor the usage of LUN, Aggregate and volume utilization. 
•Resolving the hardware issues in co-ordination with Netapp. 


Level 2 tasks
•Configuring and troubleshooting SnapMirror Environment. 
•Configuring and troubleshooting SnapVault Environment. 
•Performed DR test for the environment. 
•Snapshot management. 
•Setting up and troubleshooting V-Filer Environment. 
•Setting up and troubleshooting NFS, CIFS, and SAN Environment. 
•Ontap OS upgrade from 7.3.3 to 8.0 7 mode. 
•Storage remediation like HBA driver and firmware upgrade. 
•Capacity upgrades
•Lun management (LUN creation, LUN snapshots, Manual and automatic igroup management, LUN restore) using Snapdrive. 
•LUN assignment (Masking, zoning)
•Managing the reports using DFM
•Qtree/quota management
•Deduplication for the volumes. 
•Volume/aggregate management(Creation, expansion, deletion)





Unable to delete a file in CIFS. How do you resolve it?

- Use lock status/break commands and try again



How do you create lun for Solaris

- lun create -s size -t solaris /vol/vol1/lunname