Review - Section 3 Flashcards
Memorization of some of the key terms/ideas from Chapters 9-12
Business Continuity (BC)
Preparing for, responding to, and recovering from an application outage that adversely affects business operations.
Information Availability (IA)
The ability of an IT infrastructure to function according to business expectations during its specified time of operation.
Disaster Recovery
The coordinated process of restoring systems, data, and the infrastructure required to support ongoing business operations after a disaster occurs.
Disaster Restart
The process of restarting business operations with mirrored consent copies of data and applications.
Recovery-Point Objective (RPO)
The point in time to which systems and data must be recovered after an outage. The amount of data loss that a business can endure.
Recovery-Time Objective (RTO)
The time within which systems and applications must be recovered after an outage. The amount of downtime that a business can endure and survive.
Business Impact Analysis (BIA)
Identifies which business units, operations, and processes are essential to the survival of the business.
Failure Analysis
Involves analyzing both the physical and virtual infrastructure components to identify systems that are susceptible to a single point of failure and implementing fault-tolerance mechanisms.
Single Point of Failure
The failure of a component that can terminate the availability of the entire system or IT service.
Data Archiving
The process of moving data that is no longer actively used from primary storage to a low-cost secondary storage.
Disaster Recovery
Restore production data to an operational state after disaster.
Operational Recovery
Restore data in the event of data loss or logical corruptions that may occur during routine processing.
Backup Granularity
Depends on business needs and the required RTO/RPO.
Cumulative Backup
Copies the data that has changed since the last full backup. Takes longer than an incremental backup but faster to restore.
Incremental Backup
copies the data that has Changed since the last full or incremental backup, whichever occurred more recently. Faster than a full backup.
Bare-Metal Recovery (BMR)
A backup in which all metadata, system information, and application configurations are appropriately backed up for a full system recovery.
Data Deduplication
The process of identifying and eliminating redundant data.
Fixed Content
Aged data that is less likely to be changed.
Archival
Preserve transaction records, email, and other business work products for regulatory compliance.
Archiving Agent
Software installed on the application server. Responsible for scanning the data that can be archived based on the policy defined on the archiving server.
Archiving Server
Software installed on a host that enables administrators to configure policies for archiving data.
Archiving Storage Device
Stores fixed content.
Source
A host accessing the production data.
Target
LUN(s) on which the production data is replicated.
Local Replication
Integrated into the storage device. Includes snapshots, LVM replication etc.
Synchronous Replication
Real-time to another storage device in another location.
Asynchronous Replication
Not real-time to another storage device in another location.
Full-Volume Mirroring
The target is attached to the source and established as a mirror of the source.
Continuous Data Protection (CDP)
A technology used for network-based local and remote replications. Provides any-point-in-time recovery capability during its normal operation.
Journal Volume
Contains all the data that has changed from the time the replication session started.
Remote Replication
The process to create replicas of information assets at remote sites (locations).
Data Migration and Mobility Solution
A specialized replication technique that enables creating remote PIT copies.
Data Mobility
Refers to moving data between heterogeneous storage arrays for cost, performance, or any other reason.
Data Migration
Refers to moving data from one storage array to other heterogeneous storage arrays for technology refresh, consolidation, or any other reason.
Control Array
The array performing the replication operations.
Push Operation
Data is moved from the control array to the remote array.
Pull Operation
Data is moved from the remote array to the control array.
Synchronous Replication
Writes must be committed to the source and remote replica before they are acknowledged to the host.
Asynchronous Replication
Writes are committed to the source and immediately acknowledged to the host.
Disk-Buffered Replication
A combination of local and remote replication technologies.
Host-Based Log Shipping
Transactions to the source database are captured in logs which are periodically transmitted to the remote host who then applies them to the remote database.
Three Site Replication
Data from the source is replicated to two remote sites.
Three Site Replication Implementations
- Three site cascade/multi-hop
- Three site triangle/multi-target
LVM-Based Replication
The logical volume manager is responsible for creating and controlling the host-level logical volumes.
Storage Array-Based Replication
The array-operating environment performs the local replication process. Replicas are on the same SAN/array.
Source-Based Deduplication
Data is deduplicated at the source (backup client).
Target-Based Deduplication
Data is deduplicated at the target.
Multipathing Software (MPIO)
- Recognizes and utilizes alternate I/O path to data
- Provides load balancing by distributing I/Os to all available, active paths
- Intelligently manages the paths to a device by sending I/O down the optimal path