4726397
Description
Flashcards by michael.0lsn, updated more than 1 year ago
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Created by michael.0lsn
over 9 years ago
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| Question | Answer |
| Network/Server Management | A single point of control to monitor and manage a networked system |
| Performance Management | ISO's category for optimizing quality of service |
| Baseline | Measuring the normal conditions of a Network or System through all stages of load |
| Fault Tolerance | The term for preventing outages |
| ROI | amount of value received relative to the amount of money invested |
| MTBF | Average life span of a component |
| MTTR | The average amount of time that it takes to repair a component |
| AFR | Yearly failure rate written as a percentage |
| HA | Less than 8.8 hours of downtime per year |
| Workload Characterization | Number of User's a system can support and expected response time |
| Disaster Recovery Plan | a written plan describing the steps a company or individual would take to restore computer operations in the event of a disaster |
| RPO | The point, to which applications must be recovered in order to get the business back online after a disaster |
| RTO | Maximum allowable time to bring the applications (RPO) back online after a disaster |
| Backup Metadata | Information about the backup data |
| Backup Catalogue | A metadata database maintained by the backup server |
| Hot Backup | A backup performed while the application is running |
| Differential | only files that have changed since the last FULL backup |
| Incremental | files that have changed since the last FULL OR INCREMENTAL backup |
| Synthetic full | a full backup created on the backup device from full and incremental or differentials |
| Snapshots | “Point in Time” images of live systems |
| CDP | Backup system continuously track changes in data |
| Replication | keep a second, synchronized copy of data on a separate system |
| HSM | Use different types of storage media, (RAID, disk, tape) each representing a different level of cost and speed of retrieval when access is needed. |
| Deduplication | find and delete duplicated on the storage system |
| SAN | A network that moves storage data only, not client data |
| Rule 3-2-1 | You should have at least 3 backup copies on a couple of different media with at least one of those copies offsite |
| Cloud Synched | A backup folder or drive that looks local but is on the cloud |
| SAN backup architecture | Backup data is moved via a separate network designed for storage only |
| Write penalty | The number of extra operations it takes to perform a write on a RAID system |
| Disk IOPS | 1 / (average latency in seconds + average seek time in seconds) |
| Multicast cluster MAC | each host in the cluster retains it's own MAC address as well as the MAC address of the cluster |
| RAID 0 | Striped array with no fault tolerance |
| RAID 3 | RAID that performs well under applications that just want one long sequential data transfer like video servers |
| RAID 5 | RAID that has a write penalty of 4 |
| RAID 6 | RAID that can withstand the loss of two disks |
| IOPS | The most common measurement of a storage systems overall performance |
| Distributed Computer Clustering | different parts of a program run simultaneously on two or more computers that are communicating with each other over a network |
| Parallel Computer Clustering | simultaneous execution of the same task (split up and specially adapted) on multiple processors in order to obtain results faster |
| Load Balancing each node in the cluster is configured to provide the same service | each node in the cluster is configured to provide the same service |
| Quorum | ›Configuration information for the cluster |
| Heartbeat | ›A message sent between cluster nodes at regular intervals to determine node availability |
| Symmetric Cluster | Every server in the cluster performs active work |
| Asymmetric Cluster | Also called active/passive clustering |
| Round Robin cluster algorithm | ›distributes the load equally to each server in the cluster, regardless of the current number of connections or the response time |
| Least-Connection cluster algorithm | sends requests to servers in a cluster, based on which server is currently serving the fewest connections |
| 9. What is the Multicast method of MAC addressing in clustering? | You can distribute incoming client requests to cluster hosts by sending to adapter multicast MAC address. -used when you only have one nic per node |
| 5 benefits of clustering | -Improve availability -Improve performance -Improve scalability -Improve manageability -Load balancing |
| Deduplication | Reduces size of stored data File level or Block level Finds repetitive data Deletion of duplicate data uses pointers instead of copies |
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