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Advanced O&M Command Reference

OceanStor 2800 V3 V300R006

This document is applicable to OceanStor 2800 V3. Based on the CLI, this document describes how to use various commands classified by functionsand how to set the CLI and manage the storage system through these commands. The document that you browse online matches the latest C version of the product. Click Download to download documents of other C versions.
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show pal snap_fai

show pal snap_fai

Function

The show pal snap_fai command is used to query the snapshot information in the FAI structure.

Format

show pal snap_fai [ volume_id=? ] [ controller=? ]

Parameters

Parameter

Description

Value

volume_id=?

Volume ID of the snapshot.

To obtain the value, run the "show pal snap_fai" command without parameters.

controller=?

Controller ID.

The value is in the format of "XA" or "XB" or "XC" or "XD", where the "X" is an integer ranging from 0 to 3, for example: "0A", "1C".

Views

Developer view

Usage Guidelines

None

Example

  • Query all snapshot information on a storage array.
    developer:/>show pal snap_fai 
    Volume ID      File System ID  Snapshot ID IO Switch IO Count Reference Count FAI Address        Objset Address  
     -------------- -------------- ----------- --------- -------- --------------- ------------------ ------------------  
     0x104000000001 1              0x1         Start     0         0              0xffff880aba69dd20 0xffff880a9a127050  
     0x204000000001 1              0x2         Start     0         0              0xffff880aba69dab0 0xffff880a9a128090
  • Query snapshot information about volume "0x104000000001" on a storage array.
    developer:/>show pal snap_fai volume_id=0x104000000001 
    Volume ID : 0x104000000001  
     File System ID : 1  
     Snapshot ID : 0x1  
     IO Switch : Start  
     IO Count : 0  
     Reference Count : 0  
     FAI Address : 0xffff880aba69dd20  
     Objset Address : 0xffff880a9a127050  
     Magic : 20110420  
     Is Init : 1  
     Is Used : 1  
     File System Status : Write Protect  
     Root Object ID : 3  
     RW Status : Read Only  
     User Pool Free Capacity : 0  
     Snap Info Address : 0xffff880aba823e60  
     File System Name : fs1  
     Auto Update Atime : 0  
     Read Only : 1  
     Space ID : 1  
     Disk Pool ID : 0  
     User Pool ID : 0  
     Work Controller ID : 0  
     Owner Controller ID : 0  
     Final Work Controller ID : 0  
     Home Pair ID : 0  
     Alloc Type : 1  
     WWN : 79-BF-21-81-FF-FF-FF-FF-15-7B-FD-66-01-88-FF-00  
     Qos Priority : 4  
     Block Size : 65536  
     CRC : 1  
     Snapshot Volume ID : 0x104000000001  
     Is Visible : 0  
     Dot Snapshot ID : 9  
     Rollback Mode : 0  
     Auto Snapshot Switch : 0  
     Auto Create Snapshot : 0  
     Auto Delete Snapshot : 0  
     Root Dir ID : 0  
     Clone Snapshot ID : --  
     Original File System ID : 0  
     Max Auto Snapshot Number : 0

System Response

The following table describes the parameter meanings.

Parameter

Meaning

Volume ID

Volume ID.

File System ID

File system ID.

Snapshot ID

Snapshot ID.

IO Switch

I/O switch.

IO Count

I/O count.

Reference Count

Count of I/O references.

FAI Address

FAI address.

Objset Address

Object set address.

Magic

Magic number.

Is Init

Whether the FAI structure is initialized.

Is Used

Whether the file is used.

File System Status

File system status.

Root Object ID

ID of the root directory object.

RW Status

Read and write status of the file system.

User Pool Free Capacity

Available capacity of the user pool, expressed in sectors. The parameter is used during space statistics and configured by the system.

Snap Info Address

Snapshot structure pointer.

File System Name

File system name.

Auto Update Atime

Whether file access time updating is enabled.

Read Only

Whether the file system is read-only.

Space ID

ID of the file system distributor.

Disk Pool ID

ID of the disk pool to which the file system belongs.

User Pool ID

ID of the user pool to which the file system belongs.

Work Controller ID

Working controller of the file system.

Owner Controller ID

Owning controller of the file system.

Final Work Controller ID

Final working controller of the file system.

Home Pair ID

Home engine ID of the file system.

Alloc Type

File system allocation type.

WWN

WWN of the file system.

Qos Priority

Priority setting.

Block Size

Block size.

CRC

CRC value.

Snapshot Volume ID

Volume ID of a read-only snapshot.

Is Visible

Whether a read-only snapshot is visible.

Dot Snapshot ID

ID of the ".snapshot" directory.

Rollback Mode

Snapshot rollback protection mode.

Auto Snapshot Switch

Switch of periodic snapshot creation.

Auto Create Snapshot

Periodic snapshot creation policy.

Auto Delete Snapshot

Switch of automatic deletion of file system snapshots.

Root Dir ID

ID of the root directory object of the file system.

Clone Snapshot ID

Source snapshot ID of a writable snapshot.

Original File System ID

Source file system ID of a writable snapshot.

Max Auto Snapshot Number

Maximum number of periodic snapshots.

Translation
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Updated: 2019-07-12

Document ID: EDOC1000138381

Views: 726577

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