Create Storage Template - File system advanced panel options - for viewing or updating the storage template

Article:HOWTO64833  |  Created: 2012-01-04  |  Updated: 2012-08-24  |  Article URL http://www.symantec.com/docs/HOWTO64833
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Create Storage Template - File system advanced panel options - for viewing or updating the storage template

This topic applies to Veritas Storage Foundation Add-on for Storage Provisioning 4.1.

Use this wizard panel to view or update the storage template file system advanced fields upon creation or update of the storage template. These parameters apply to running the mount and vxtunefs commands.

Note:

When you create a storage template based on Veritas File System (VxFS), you can set all the parameters. However, some of these parameters are not supported on certain platforms.

Table: Create Storage Template - Performance Tunables Tab

Field

Description

Intent log size (bytes)

Enter the size of the intent log in the multiples of size byte.

Intent log behavior (mount option)

Select an option to control the timing of flushing the VxFS intent log and other metadata to disk. This affects when operations are guaranteed persistent after a system failure.

I/O feature (mount option)

Select the required mount I/O feature.

Read ahead

Select the required option. This implements an algorithm that allows read ahead to detect more elaborate patterns (such as increasing or decreasing read offsets, or multithreaded file accesses) in addition to simple sequential reads.

Allocation unit size (bytes)

Enter the size of the allocation unit.

Initial extent size (blocks)

Enter a value for the initial extent.

Maximum extent size (bytes)

Enter the maximum size of an extent.

HSM write preallocation

Select the required option. For a file managed by a Hierarchical Storage Management (HSM) application, this option preallocates disk blocks before data is migrated back into the file system.

Maximum disk queue (bytes)

Enter a value for the maximum disk queue that is generated by a single file.

Write throttle

Enter a value to lower the number of dirty pages per file that the file system generates before writing them to disk.

Table: File Change Log Tunables Tab

Field

Description

FCL keep time

Enter a value for the VxFS File Change Log (FCL) to keep records in the log.

FCL maximum allocated space

Enter the maximum amount of space that can be allocated to the VxFS File Change Log.

FCL open interval

Enter the time interval in seconds within which subsequent opens of a file do not produce an additional FCL record.

FCS write interval

Enter the time, in seconds, that must elapse before the VxFS File Change Log records a data overwrite, data extending write, or data truncate for a file.

Table: Other Options Tab

Field

Description

Auto mount

Select an option. This lets the file system to be mounted explicitly.

Preferred read request size

Enter the preferred read request size.

Number of parallel read request

Enter the number of parallel read requests of size read_pref_io that can be outstanding at one time.

Preferred write request size

Enter the preferred write request size.

Number of parallel write requests

Enter the number of parallel write requests of size write_pref_io that can be outstanding at one time.

Maximum inode aging count

Enter the maximum number of inodes to place on an inode aging list.

Minimum inode size

Enter the minimum size to qualify a deleted inode for inode aging.

Large files enabled

Select an option to make the file system is large files capable.

See Creating a storage template using VxFS file systems using Veritas Storage Foundation Add-on for Storage Provisioning 4.1.

See Creating a storage template using volumes using Veritas Storage Foundation Add-on for Storage Provisioning 4.1.

See Updating a storage template using Veritas Storage Foundation Add-on for Storage Provisioning 4.1.


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