Clustered Data ONTAP 8.2

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Author:
smackafiyah
ID:
230336
Filename:
Clustered Data ONTAP 8.2
Updated:
2013-08-20 08:46:10
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ontap
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Ontap
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  1. Cluster Administrators
    • Cluster administrators administer the entire cluster and the virtual storage servers (Vservers) it contains.
    • - administer entire cluster and it's resources
    • - setup Vservers and delegate vserver administration to vserver administrators
    • - admin account or role has capabilities to manage cluster and vservers
  2. VServer Administrator
    • A Vserver administrator can administer a Vserver and its resources, such as volumes, protocols, andservices, depending on the capabilities assigned by the cluster administrator.
    • - can only view their own data Vservers storage and resources (e.g volumes, LIFs, protocols, services)
  3. Cluster can be accessed through CLI (command-line interface) or web interface
    • CLI - telnet, ssh, rsh
    • Web - web browser (IE, firefox, chrome, etc)
    • OpenSSH client and server version supported, only SSHv2 supported
    • Supports max of 64 concurrent connections per node
    • Only supports AES and 3DES encryption
    • Telnet and RSH are disabled by default in firewall mgmt
  4. CLI Commands
    • Cluster Shell - the default shell, provides commands needed to manager cluster and resources
    • Node Shell - shell for commands at the node level, accessible through system node run
    • System Shell - low level shell only used for diagnostics and troubleshooting, access only with guidance from technical support, diag account locked by default
  5. OnCommand System Manger
    • manage storage systems and storage objects
    • support ONTAP 8.2 and 8.1.2
    • manage disks, volumes, qtrees, quotas
    • configure protocols (CIFS and NFS, provisional file sharing)
    • configure FC (fiber channel) and iSCSI (i-scuzy) protocols for block access
    • configure network configuration settings in storage systems
    • setup SnapVault and SnapMirror relationships
    • Create and configure vServers and manage storage objects within Vserver, manage services
  6. Cluster Management
    • Pair of nodes grouped together to form a cluster
    • enable continuing service to users if one node goes offline
    • can contain up to 24 nodes (FC and iSCSI limited to 8)
    • quorum - precondition for a fully functional cluster, only one node can hold quorum at any time
    • epsilon - extra voting weight if quorum comes up as a tie, defaulted to the first node, does not move to another node if first node goes down
  7. VServer Administration
    • Virtual storage server (Vserver)
    • contains data volumes and one or more LIFs (logical interface)
    • can contain one or more FlexVol volumes or one infinite volume
    • isolates virtualized data storage and network, appears as a single server to clients
    • provide data access to clients without regard to physical storage or controller
    • they provide benefits such as nondisruptive operation,scalability, security and support unified storage
    • can be assessed through SSH, ONTAP API (web), SNMP
  8. Namespace
    • logical grouping of volumes that are joined together at junction points to create asingle, logical file system that derives from the Vserver root volume
    • each Vserver has a namespace
  9. Volume junctions
    • a way to join individual volumes together into one namespace
    • transparent to CIFS and NFS clients
    • formed when a volume is mounted below the root to create a file tree
  10. Security Styles
    • Unix, NTFS, mixed, Unified (only for Infinite Volumes)
    • Determine what type of permissions ONTAP can use to control data access
    • ONTAP preserves UNIX permissions when files are edited and saved by Windows application
  11. iSCSI (Internet small computer systems interface)
    • enabled by default on all iSCSI logical interfaces (LIPs)
    • enables you to transfer block data to hosts using SCSI protocol over TCP/IP, defined by RFC 3270
    • In an iSCSI network, storage systems are targets that have storage target devices, which are referred to as LUNs (logical units)
    • Uses a standard TCP/IP network
    • Nodes: targets (storage systems), initiators (hosts)
    • node identifiers: iqn (storage and initiators), eui (initiator)
    • Default port: 3260
  12. FC (Fiber Channels)
    • FC is a licensed service on the storage system that enables you to export LUNs and transfer blockdata to hosts using the SCSI protocol over a Fibre Channel fabric
    • Nodes register with the FNS (Fabric Name Server) when connected to an FC switch
    • Each FC node is identified through the WWNN (worldwide node name)
  13. ALUA (Asynchronise Logical Unit Access)
    used on iSCSI and FC to determine optomized path between storage system and host
  14. MPIO (Multipath I/O)
    • Provides more than one path between the controller and initiator
    • provides high availability for iSCSI and FC
  15. Raid 4
    • Provides single parity protection in case a single disk fails
    • Min of 2 disks required, data disk and parity disk
    • RAID4 mainly used by NetApp storage systems
  16. RAID-DP
    • Uses dual parity to provide data protection if one of two disks fails
    • Min of 3 disks needed, one data disk, one parity disk, and one dual parity disk
    • The default RAID type for all aggregates

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