Qtrees

Overview

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Basic Details:

- partition volumes into smaller segments

- properties are: quotas, backups, security style, CIFS oplocks settings

- can be used in creating CIFS shares

- you can create several qtrees inside a volume and each of them can have

  different quotas

Properties:

Opportunistic and Lease oplocks

  Traditional oplocks (opportunistic locks) and lease oplocks enable a CIFS

client in certain file-sharing scenarios to perform client-side caching of

read-ahead, write-behind, and lock information

  A client can then read from or write to a file without regularly reminding the

server that it needs access to the file in question. This improves performance

by reducing network traffic.

Commands

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Displaying

# quick view of status qtree status [-i|-v] # displays statistics qtree stats ** stats are reset upon system reboot ** stats are reset when volume containing it is brought online ** stats are reset when you trigger this command: qtree stats -z

Creating

# creates a qtree under a specified volume qtree create /vol// -m   ** mode is permission   ** you can see default mode under wafl.default_qtree_mode option # creates a qtree under the root volume (/vol/vol0) qtree create

Modifying

# Enabling/Disabling for entire storage cifs.oplocks.enable on cifs.oplocks.enable off # Enabling/Disabling for qtrees qtree oplocks /vol/vol2/proj enable qtree oplocks /vol/vol1/qtree enable qtree oplocks /vol/vol1/qtree disable

Renaming

1. volume that contains the qtree must be available   on a UNIX client: mount filer:/vol/my_vol/ /mnt   on a Windows client: map the qtree into windows explorer 2. find the qtree and rename it   on a UNIX client: mv /mnt/qtree_old /mnt/qtree_new   on a Windows client: rename using windows explorer ** you can rename qtree depending on the qtree permissions

Deleting

# basic qtree delete /path/to/qtree # force (if for some reason directory is not emtpy) qtree -f delete /path/to/qtree   * you might need to go to "priv set advanced"

Tutorials

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Actual commands on CIFS creation

qtree create /vol/data_share_vol/data_share_qtree qtree security /vol/data_share_vol/data_share_qtree ntfs qtree oplocks /vol/data_share_vol/data_share_qtree enable cifs shares -add data$ /vol/data_share_vol/data_share_qtree