Veritas Access Appliance Administrator's Guide

Last Published:
Product(s): Appliances (8.0)
Platform: Access Appliance OS,Veritas 3340,Veritas 3350
  1. Section I. Introducing Access Appliance
    1. Introducing Access Appliance
      1.  
        About Access Appliance
      2.  
        About the Access Appliance Dashboard
      3. Getting started with the Access CLISH
        1.  
          Accessing the Access CLISH
        2.  
          Navigating the Access CLISH
        3.  
          Getting help using the Access CLISH
        4.  
          Displaying the command history
        5.  
          Using the more command
      4.  
        Getting started with Access Appliance APIs
  2. Section II. Configuring Access Appliance
    1. Managing users
      1.  
        About user management
      2.  
        About the naming requirements for adding new users
      3.  
        About the naming requirements when assigning roles to domain users
      4.  
        Adding and removing user roles using GUI
      5.  
        Performing user management using CLISH
    2. Configuring the network
      1.  
        About configuring the Access Appliance network
      2.  
        About bonding Ethernet interfaces
      3.  
        Bonding Ethernet interfaces
      4.  
        Configuring DNS settings
      5.  
        About Ethernet interfaces
      6.  
        Displaying current Ethernet interfaces and states
      7.  
        Configuring IP addresses
      8.  
        Configuring VLAN interfaces
      9.  
        Configuring NIC devices
      10.  
        About configuring routing tables
      11.  
        Configuring routing tables
      12.  
        Changing the firewall settings
      13.  
        Configuring Access Appliance in IPv4 and IPv6 mixed mode
      14.  
        Support for multiple data subnets
    3. Configuring authentication services
      1.  
        About configuring LDAP settings
      2.  
        Configuring LDAP server settings
      3.  
        Administering the Access Appliance cluster's LDAP client
      4.  
        About Active Directory (AD)
      5.  
        Configuring AD server settings
      6.  
        Configuring entries for Access Appliance DNS for authenticating to Active Directory (AD)
      7.  
        Configuring AD/LDAP using the GUI
      8.  
        Configuring the NIS-related settings
      9.  
        Configuring NSS lookup order
      10.  
        Sign-in options for the Access Appliance UI
      11. Configuring user authentication using digital certificates or smart cards
        1.  
          Adding CA certificates for smart card authentication
        2.  
          Deleting CA certificates
  3. Section III. Managing Access Appliance storage
    1. Configuring storage
      1.  
        About storage provisioning and management
      2.  
        About configuring disks
      3.  
        About configuring storage pools
      4.  
        Configuring storage pools
      5.  
        About quotas for usage
      6.  
        Enabling, disabling, and displaying the status of file system quotas
      7.  
        Setting and displaying file system quotas
      8.  
        Setting user quotas for users of specified groups
      9.  
        About quotas for CIFS home directories
      10.  
        Workflow for configuring and managing storage using the Access Appliance CLI
      11.  
        Displaying information for all disk devices associated with the nodes in a cluster
      12.  
        Displaying WWN information
      13.  
        Importing new LUNs forcefully for new or existing pools
      14.  
        Initiating host discovery of LUNs
    2. Managing disks
      1.  
        Adding disks to a storage pool
      2.  
        Removing disks from a storage pool
      3.  
        Viewing information about disks
      4.  
        Accessing disk details
      5.  
        Discovering disks
      6.  
        Formatting a disk
    3. Access Appliance as an iSCSI target
      1.  
        About Access Appliance as an iSCSI target
      2.  
        Managing the iSCSI target service
      3.  
        Managing the iSCSI targets
      4.  
        Managing the LUNs
      5.  
        Managing the mappings with iSCSI initiators
      6.  
        Managing the users
      7.  
        Creating an iSCSI target and provisioning LUNs
  4. Section IV. Managing Access Appliance file access services
    1. Configuring the NFS server
      1.  
        About using the NFS server with Access Appliance
      2.  
        Using the kernel-based NFS server
      3.  
        Accessing the NFS server
      4.  
        Displaying and resetting NFS statistics
      5.  
        Configuring Access Appliance for ID mapping for NFS version 4
      6.  
        Configuring the NFS client for ID mapping for NFS version 4
      7.  
        About authenticating NFS clients
      8. Setting up Kerberos authentication for NFS clients
        1.  
          Adding and configuring Access Appliance to the Kerberos realm
    2. Using Access Appliance as a CIFS server
      1.  
        About configuring Access Appliance for CIFS
      2.  
        About configuring CIFS for standalone mode
      3.  
        Configuring CIFS server status for standalone mode
      4.  
        Changing security settings
      5. About configuring CIFS for Active Directory (AD) domain mode
        1.  
          Joining Access Appliance to Active Directory (AD)
        2.  
          Verifying that Access Appliance has joined Active Directory (AD) successfully
        3.  
          Using multi-domain controller support in CIFS
        4.  
          About leaving an AD domain
        5.  
          Changing domain settings for AD domain mode
        6.  
          Removing the AD interface
      6.  
        Setting NTLM
      7. About setting trusted domains
        1.  
          Specifying trusted domains that are allowed access to the CIFS server
        2.  
          Allowing trusted domains access to CIFS when setting an IDMAP backend to rid
        3.  
          Allowing trusted domains access to CIFS when setting an IDMAP backend to ldap
        4.  
          Allowing trusted domains access to CIFS when setting an IDMAP backend to hash
        5.  
          Allowing trusted domains access to CIFS when setting an IDMAP backend to ad
        6.  
          About configuring Windows Active Directory as an IDMAP backend for CIFS
        7.  
          Configuring the Active Directory schema with CIFS-schema extensions
        8.  
          Configuring the LDAP client for authentication using the CLI
        9.  
          Setting Active Directory trusted domains
      8.  
        About storing account information
      9.  
        Storing user and group accounts
      10.  
        Reconfiguring the CIFS service
      11.  
        About mapping user names for CIFS/NFS sharing
      12.  
        About the mapuser commands
      13.  
        Adding, removing, or displaying the mapping between CIFS and NFS users
      14.  
        Automatically mapping UNIX users from LDAP to Windows users
      15. About managing home directories
        1.  
          Setting the home directory file systems
        2.  
          Setting up home directories
        3.  
          Displaying home directory usage information
        4.  
          Deleting home directories and disabling creation of home directories
      16. About CIFS clustering modes
        1.  
          About switching the clustering mode
      17. About migrating CIFS shares and home directories
        1.  
          Migrating CIFS shares and home directories from normal to ctdb clustering mode
        2.  
          Migrating CIFS shares and home directories from ctdb to normal clustering mode
      18.  
        Setting the CIFS aio_fork option
      19. About managing local users and groups
        1.  
          Creating a local CIFS user
        2.  
          Configuring a local group
      20.  
        Enabling CIFS data migration
    3. Using Access Appliance as an Object Store server
      1.  
        About the Object Store server
      2.  
        Use cases for configuring the Object Store server
      3.  
        Configuring the Object Store server
      4.  
        About buckets and objects
      5.  
        File systems used for objectstore buckets
      6.  
        Enabling WORM on buckets
      7.  
        S3 with NFS use case
      8.  
        S3 with NSP use case
      9. Configuring the S3 server using GUI
        1.  
          Setting Object Access server default parameters
        2.  
          Setting up the Object Access server group-specific parameters
        3.  
          Viewing information about S3
        4.  
          Provisioning the S3 bucket using GUI
  5. Section V. Managing Access Appliance security
    1. Managing security
      1.  
        Security overview
    2. Setting up FIPS mode
      1.  
        FIPS 140-2 conformance for Access Appliance
      2.  
        Viewing FIPS status for Access Appliance
      3.  
        Enabling FIPS for Access Appliance
      4.  
        To enable FIPS using the command-line interface
    3. Configuring STIG
      1.  
        STIG overview for Access Appliance
      2.  
        Enabling OS STIG hardening for Access Appliance
      3.  
        Viewing STIG status of an Access Appliance
      4.  
        Enabling STIG using the command-line interface
    4. Setting the banner
      1.  
        Managing the login banner using the UI
      2.  
        Managing the banner from the command-line interface
    5. Setting the password policy
      1.  
        Managing the password policy using the UI
      2.  
        Managing the password policy from the command-line interface
    6. Immutability in Access Appliance
      1.  
        Support for immutability in Access Appliance
      2.  
        About lockdown modes
      3.  
        Selecting or changing the lockdown mode
      4.  
        Accessing the root shell in lockdown mode
      5.  
        Configuring immutability using GUI
  6. Section VI. Monitoring and troubleshooting
    1. Configuring event notifications and audit logs
      1.  
        About troubleshooting
      2.  
        Monitoring command activity
      3.  
        Monitoring alerts
      4. About alert management
        1.  
          Viewing information about alert management
        2.  
          Managing alerts
      5.  
        Monitoring events
      6.  
        Viewing reports
      7.  
        Viewing cluster storage usage
      8.  
        Viewing file system usage
      9.  
        About event notifications
      10.  
        About severity levels and filters
      11.  
        About SNMP notifications
      12.  
        Configuring a syslog server
      13.  
        Displaying events on the console
    2. Appliance log files
      1.  
        About appliance log files
      2. Gathering device logs with the DataCollect command
        1.  
          Collecting default and additional diagnostic logs
      3.  
        Downloading logs using the Log Transfer Console
      4.  
        Forwarding logs to an external server
  7. Section VII. Provisioning and managing Access Appliance file systems
    1. Creating and maintaining file systems
      1.  
        About creating and maintaining file systems
      2.  
        About encryption at rest
      3. Considerations for creating a file system
        1.  
          Best practices for creating file systems
        2.  
          Choosing a file system layout type
        3.  
          Determining the initial extent size for a file system
        4.  
          About striping file systems
        5.  
          About FastResync
        6.  
          About fsck operation
        7.  
          Enabling WORM on a file system
        8.  
          Setting retention in files
        9.  
          Setting WORM over NFS
        10.  
          Manually setting WORM-retention on a file over CIFS
        11. About managing application I/O workloads using maximum IOPS settings
          1.  
            Setting the maximum IOPS
      4.  
        Creating a file system
      5.  
        Bringing the file system online or offline
      6.  
        Listing all file systems and associated information
      7. Modifying a file system
        1.  
          Adding or removing a mirror from a file system
        2.  
          Adding or removing a column from a file system
        3.  
          Increasing the size of a file system
        4.  
          Decreasing the size of a file system
      8. Managing a file system
        1.  
          Defragmenting a file system
        2.  
          Checking and repairing a file system
        3.  
          Configuring FastResync for a file system
        4.  
          Disabling the FastResync option for a file system
        5.  
          Checking and resynchronizing stale mirrors
        6.  
          Setting file system alerts
        7.  
          Displaying file system alert values
        8.  
          Removing file system alerts
      9.  
        Destroying a file system
      10.  
        Upgrading disk layout versions
  8. Section VIII. Provisioning and managing Access Appliance shares
    1. Creating shares for applications
      1.  
        About file sharing protocols
      2.  
        About concurrent access
      3.  
        Sharing directories using CIFS and NFS protocols
      4.  
        Sharing a file system as a CIFS home directory
      5.  
        About concurrent access with NFS and S3
    2. Creating and maintaining NFS shares
      1.  
        About NFS file sharing
      2. About the NFS shares
        1.  
          Creating an NFS share with continuous replication
        2.  
          Creating an NFS share with episodic replication
        3.  
          Creating an NFS share with encryption
        4.  
          Creating an NFS share with episodic replication and encryption
        5.  
          Creating an NFS share without replication and encryption
      3.  
        Displaying file systems and snapshots that can be exported
      4.  
        Exporting an NFS share
      5.  
        Displaying exported directories
      6.  
        About managing NFS shares using netgroups
      7.  
        Unexporting a directory or deleting NFS options
      8.  
        Exporting an NFS share for Kerberos authentication
      9.  
        Mounting an NFS share with Kerberos security from the NFS client
      10.  
        Exporting an NFS snapshot
    3. Creating and maintaining CIFS shares
      1.  
        About managing CIFS shares
      2. About the CIFS shares
        1.  
          Creating a CIFS share with continuous replication
        2.  
          Creating a CIFS share with episodic replication
        3.  
          Creating a CIFS share with encryption
        4.  
          Creating a CIFS share with episodic replication and encryption
        5.  
          Creating a CIFS share without replication and encryption
      3.  
        Exporting a directory as a CIFS share
      4.  
        Configuring a CIFS share as secondary storage for an Enterprise Vault store
      5.  
        Exporting the same file system/directory as a different CIFS share
      6.  
        About the CIFS export options
      7.  
        Setting share properties
      8.  
        Displaying CIFS share properties
      9.  
        Hiding system files when adding a CIFS normal share
      10.  
        Allowing specified users and groups access to the CIFS share
      11.  
        Denying specified users and groups access to the CIFS share
      12.  
        Exporting a CIFS snapshot
      13.  
        Deleting a CIFS share
      14.  
        Modifying a CIFS share
      15.  
        Making a CIFS share shadow copy aware
      16. About managing CIFS shares for Enterprise Vault
        1.  
          Creating a CIFS share for Enterprise Vault with replication
        2.  
          Creating a CIFS share for Enterprise Vault without replication
    4. Integrating Access Appliance with Data Insight
      1.  
        Access Appliance integration with Data Insight
  9. Section IX. Managing Access Appliance storage services
    1. Configuring episodic replication
      1.  
        About Access Appliance episodic replication
      2.  
        How Access Appliance Replication works
      3.  
        Starting Access Appliance episodic replication
      4.  
        Setting up communication between the source and the destination clusters
      5.  
        Setting up the file systems to replicate
      6.  
        Setting up files to exclude from an episodic replication unit
      7.  
        Scheduling the episodic replication
      8.  
        Defining what to replicate
      9.  
        About the maximum number of parallel episodic replication jobs
      10.  
        Managing an episodic replication job
      11.  
        Replicating compressed data
      12.  
        Displaying episodic replication job information and status
      13.  
        Synchronizing an episodic replication job
      14.  
        Behavior of the file systems on the episodic replication destination target
      15.  
        Accessing file systems configured as episodic replication destinations
      16. Episodic replication job failover and failback
        1.  
          Process summary
        2.  
          Overview of the planned failover process
        3.  
          Overview of the planned failback process
        4.  
          Overview of the unplanned failover process
        5.  
          Overview of the unplanned failback process
    2. Configuring continuous replication
      1.  
        About Access Appliance continuous replication
      2. How Access Appliance continuous replication works
        1.  
          How data flows in continuous replication synchronous mode
        2.  
          How data flows in continuous replication asynchronous mode
      3.  
        Starting Access Appliance continuous replication
      4.  
        Setting up communication between the source and the destination clusters
      5.  
        Setting up the file system to replicate
      6.  
        Managing continuous replication
      7.  
        Displaying continuous replication information and status
      8.  
        Unconfiguring continuous replication
      9.  
        Preserving the file system on the destination cluster
      10. Continuous replication failover and failback
        1.  
          Process summary
        2.  
          Overview of the planned failover process
        3.  
          Overview of the planned failback process
        4.  
          Overview of the unplanned failover process
        5.  
          Overview of the unplanned failback process
      11.  
        Addition of multiple file systems to a Replicated Volume Group
    3. Using snapshots
      1.  
        About snapshots
      2.  
        Enabling WORM on storage snapshots
      3.  
        Creating snapshots
      4.  
        Displaying snapshots
      5.  
        Managing disk space used by snapshots
      6.  
        Bringing snapshots online or taking snapshots offline
      7.  
        Restoring a snapshot
      8.  
        About snapshot schedules
      9.  
        Configuring snapshot schedules
      10.  
        Managing automated snapshots
    4. Using instant rollbacks
      1.  
        About instant rollbacks
      2.  
        Creating a space-optimized rollback
      3.  
        Creating a full-sized rollback
      4.  
        Listing Access Appliance instant rollbacks
      5.  
        Restoring a file system from an instant rollback
      6.  
        Refreshing an instant rollback from a file system
      7.  
        Bringing an instant rollback online
      8.  
        Taking an instant rollback offline
      9.  
        Destroying an instant rollback
      10.  
        Creating a shared cache object for Access Appliance instant rollbacks
      11.  
        Listing cache objects
      12.  
        Destroying a cache object of a Access Appliance instant rollback
  10. Section X. Reference
    1. Appendix A. Access Appliance documentation
      1.  
        Using the Access Appliance product documentation
      2.  
        About accessing the online man pages
  11.  
    Index

Determining the initial extent size for a file system

Veritas File System (VxFS) determines the size of the first extent that is allocated based on the first write to a new file. Normally, the first extent is the smallest power of 2 that is larger than the size of the first write. If that power of 2 is less than 8 KB (the default file system block size), the first extent that is allocated is 8 KB. After the initial extent is allocated, the file system increases the size of subsequent extents with each allocation as the file size is increased using extending writes.

The initial extent size is tunable, and can be changed using the System> option modify tunefstab command.

Increasing the initial extent size to a larger value helps to reduce file system fragmentation and improves I/O performance.

The best value for the initial extent size depends on the expected file sizes that are created by the application. The maximum value is 32768, which equates to a 256 MB extent allocation using the default 8 KB file system block size. Any over allocation of space is returned to the free space pool after the file is closed.

If the application creates a lot of small files with an exact size of 1 MB, then the initial extent size can be set to 128 (1 MB). If 1 MB is an approximate file size, then the initial extent size can be set to 64 (512 KB) instead. If most files are approximately 1 GB or greater in size, then the maximum value of 32768 can be used.