Read Reallocation Of Data; Extents For Flexvol Volumes; Partner Recipients For Autosupport Email Notifications - IBM N Series Manual

Data ONTAP 8.0 and later releases allow you to create a new root FlexVol
volume but not a new traditional root volume from the boot menu. However,
preexisting traditional root volumes are still supported.
For information about the boot menu, see the na_floppyboot(1) man page and
the Data ONTAP 8.0 7-Mode System Administration Guide.

Read reallocation of data

For workloads that perform a mixture of random writes and large and
multiple sequential reads, the read reallocation function improves the file's
layout and sequential read performance.
When you enable read reallocation, by using the vol options read_realloc
command, Data ONTAP analyzes the parts of the file that are read
sequentially. If the associated blocks are not already largely contiguous, Data
ONTAP updates the file's layout by rewriting those blocks to another location
on disk. The rewrite improves the file's layout, thus improving the sequential
read performance the next time that section of the file is read.
For more information about the vol options read_realloc command, see the
na_vol(1) man page and the Data ONTAP 8.0 7-Mode System Administration
Guide.

Extents for FlexVol volumes

Enabling extents, by setting the vol options extent command to on, might
improve performance of Exchange database validation. However, to enable
extents when storage space is a concern, you should set the vol options
extent command to space_optimized instead of on.
The space_optimized option conserves space. However, it results in degraded
read performance through the Snapshot copies. Therefore, if fast read
performance through Snapshot copies is a higher priority to you than storage
space, do not use the space_optimized option.
For more information about the vol options extent command, see the
na_vol(1) man page and the Data ONTAP 8.0 7-Mode System Administration
Guide.

Partner recipients for AutoSupport email notifications

The new option autosupport.partner.to allows you to define the list of
partner recipients for AutoSupport email notifications.
Whereas the autosupport.support.to option is read-only and displays where
email-based AutoSupport notifications are sent to technical support when the
autosupport.support.enable option is set to on (the default), the
autosupport.partner.to option allows you to define a list of partner
New and changed features
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