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Veritas Access 7.3 Administrator's Guide

Last Published: 2019-04-04

Product(s): Access (7.3)

Platform: Linux

Section I. Introducing Veritas Access
1. Introducing Veritas Access
Section II. Configuring Veritas Access
Section III. Managing Veritas Access storage
Section IV. Managing Veritas Access file access services
Section V. Managing the Veritas Access Object Store server
1. Using Veritas Access as an Object Store server
Section VI. Monitoring and troubleshooting
1. Monitoring events and audit logs
Section VII. Provisioning and managing Veritas Access file systems
1. Creating and maintaining file systems
Section VIII. Configuring cloud storage
1. Configuring the cloud gateway
  1. About the cloud gateway
  2. Configuring the cloud gateway
2. Configuring cloud as a tier
Section IX. Provisioning and managing Veritas Access shares
Section X. Managing Veritas Access storage services
Section XI. Reference
1. Appendix A. Veritas Access documentation
  1. Using the Veritas Access product documentation
  2. About accessing the online man pages
2. Appendix B. Veritas Access tuning
  1. File system mount-time memory usage

Setting file system alerts

For a file system to run efficiently, you should always reserve some space for the file system rather than using 100% of the space. You can set file system alerts based on file system or snapshot usage. You can set the alert based on the number of inodes used, file system space used, or snapshot usage.

File system alerts can be displayed by using the Report> showevents command.

To set file system alerts

To set file system alerts, enter the following:

Storage> fs alert set numinodes | numspace | fullspace | fullinodes 
value [fs_name,...] [snapshot_name]

numinodes	When setting the alert for numinodes, value is the number of inodes used. The default alert value for numinodes is set at 0. An alert will not be sent until you set it to a different value.
numspace	When setting the alert for numspace, value is the percentage you want to set to trigger the alert. By default, the alert is sent at 80%. If you do not specify a file system name, the default value is modified.
fullspace	fullspace is the tunable for setting an alert if the file system becomes full. When file system usage is above the limit set by the fullspace tunable, all the NFS/CIFS shares on the file system are automatically changed to read-only to prevent the file system from becoming full again. When you grow the file system or delete some files to free up space, the NFS/CIFS shares are automatically changed back to read-write (there might be a delay of up to five minutes) for the change to occur. Note: The file system size is checked every five minutes. During this five-minute interval, if the usage of the file system grows to more than 80%, the NFS/CIFS shares are changed to read-only. If the file system is small and write I/O is fast, then the file system can be filled up to 100% before being changed to read-only. This is by design. By default, the fullspace tunable is set to 0, which means that the fullspace tunable is disabled.
fullinodes	fullinodes is the tunable for setting an alert if the file system becomes full. When inodes on a file system reach the limit of fullinodes, the NFS/CIFS shares on the file system are automatically changed to read-only. After the file system is changed to read-only, you need to delete some files from the file system, and a remount of the file system may be required for the NFS/CIFS shares to be changed to read-write. By default, the fullinodes tunable is set to 0, which indicates that the fullinodes tunable is disabled.
fs_name	Name of the file system for which you want to set the file system alerts. fs_name is optional. To specify multiple file systems, use commas to separate the file system names.
snapshot_name	Name of the snapshot for which you want to set the file system alert. Note: The following are reserved words for snapshot_name: flags, ctime, and mtime.

Examples of alerts:

NUMSPACE alerts in Report> showevents

2011 Nov 14 23:55:02 [CLUS_01,alert,master] [[fs alert]] numspace 
set at 70(%) crossed for File System fs1, current usage 98(%)

NUMINODES alert in Report> showevents

2011 Nov 15 00:05:22 [CLUS_01,alert,master] [[fs alert]] numinodes 
set at 2000 crossed for File System fs1, current usage 7768

Examples for setting alerts that are file-system specific:

Storage> fs alert set numinodes 2M fs1
ACCESS fs SUCCESS V-288-663 Alert of type [ numinodes ] set to 2M on 
the file system fs1

Storage> fs alert set numinodes 2M 
ACCESS fs SUCCESS V-288-663 Default Alert on the file systems of type 
[ numinodes ] set to 2M

Examples for default alerts:

Storage> fs alert set numspace 80 fs1 
ACCESS fs SUCCESS V-288-663 Alert of type [ numspace ] set to 80 on 
the file system fs1

Storage> fs alert set numspace 60
ACCESS fs SUCCESS V-288-663 Default Alert on the file systems of 
type [ numspace ] set to 60

Example for setting a fullspace alert:

Storage> fs alert set fullspace 98 
ACCESS fs SUCCESS V-288-1805 Default Alert on the file systems of 
type [ fullspace ] set to 98 
Storage> fs alert unset fullspace 
ACCESS fs SUCCESS V-288-1740 Alert of type [ fullspace ] set 
to default value 0 (%)

Example for setting a fullinodes alert:

storage> fs alert set fullinodes 50000000
ACCESS fs SUCCESS V-288-1805 Default Alert on the file systems of type 
[ fullinodes ] set to 50000000

Storage> fs alert show
File System          Alert Type      Value           Current Usage
==================== ==========      =========       =============
fs2                  numspace        85% (D)         75%
fs2                  numinodes       0 (D)           110215
fs2                  fullspace       98% (D)         75%
fs2                  fullinodes      50000000 (D)    110215
share1               numspace        85% (D)         80%
share1               numinodes       0 (D)           8044
share1               fullspace       98% (D)         80%
share1               fullinodes      50000000 (D)    8044