General Operating Guidelines and Limitations

 

 

Operating System /

 

Affected Component

Description

 

 

All

Affinity names cannot be longer than eight characters. StorNext truncates

 

affinity names after the eighth character, so if you have two or more affinities

 

whose first eight characters are identical, StorNext considers them the same

 

affinity. For example, if you have affinities called “affdata01” and

 

“affdata02,” StorNext sees them both as “affdata0” and treats them as the

 

same affinity.

 

 

 

The Move Stripe Group Data feature (part of Dynamic Resource Allocation)

 

does not support moving sparse files. Sparse files are files that lack on-disk

 

allocations for some of the data within the data range indicated by the size of

 

the file.

 

A stripe group is defragmented as part of the data moving process. Because

 

defragmenting a sparse file would make it unsparce (and increase disk

 

usage), snfsdefrag skips sparse files when defragmenting. Therefore, all

 

existing sparse files remain on the original stripe group after moving of other

 

files is complete.

 

As an example, the gnu “cp” command uses a heuristic to attempt

 

maintaining the “sparseness” of a file.

 

Because the file system in question has already had the source stripe group

 

marked read-only, the “cp” command has no choice but to move the file off

 

of the original stripe group.

 

 

 

Clients outside a NAT firewall can no longer access a metadata controller

 

inside the firewall.

 

Support for client access through non-NAT firewalls continues to be

 

supported via the fsports configuration file.

 

 

 

If you have configured custom mount options in the /etc/fstab file other than

 

rw and diskproxy, if you subsequently add or remove the disk proxy settings

 

using the StorNext GUI, any custom mount options will be lost. (Settings are

 

added or removed in the StorNext GUI by navigating to the SNFS home page

 

and then choosing Filesystems > Modify from the Config menu.)

 

 

 

In StorNext 3.0, the buffercachemin and buffercachemax parameters are

 

deprecated and are replaced by buffercachecap.

 

Also, in the Client Configuration Windows utility, the Buffer Cache Min and

 

Buffer Cache Max settings are replaced by Buffer Cache Cap. The Non-Paged

 

Pool Percentage setting has been removed.

 

 

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6-01658-05 specifications

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