STONEFLY ISC-1208s, Руководство по установке

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StoneFly ISC Setup Guide Glossary
V8.0.3x © StoneFly Inc. | All rights reserved Page 44
Asynchronous Mirroring
Transactions that maintain synchronization for logical volumes occur in a batch rather than
real-time mode. An asynchronous mirroring is desired when mirrored logical volumes are
separated by distance in order to reduce the effects of distance-induced latency. It is also
desirable to use Asynchronous Mirroring or replication to reduce the bandwidth
requirements of the network connection.
Backup
1. (noun) A collection of data stored on non-volatile (usually removable) storage
media for purposes of recovery in case the original copy of data is lost or becomes
inaccessible. The data is also called the backup copy. To be useful for recovery, a
backup must be made by copying the source data image when it is in a consistent
state.
2. (verb) The act of creating a backup.
Campus Mirrors
Mirror images that are behind the Secondary
Storage Concentrator
CHAP
CHAP (Challenge Handshake Authentication Protocol) allows you to set a Password or
“Secret” for as a gatekeeper for communication between a host initiator and a volume.
Clusters
You must have at least two Storage Concentrators to implement FailOver on an IP Storage.
Multiple Storage Concentrators are known as a cluster. In a clustered pair there will be one
Primary and one Secondary
Storage Concentrator
. A cluster appears as a single entity to
hosts on the network.
Concatenation
A logical joining of two series of data, usually represented by the symbol "|". In data
communications, two or more data are often concatenated to provide a unique name or
reference (e.g., S_ID | X_ID). Volume managers concatenate disk address spaces to present
a single larger address space.
Configuration
1.
The process of installing or removing hardware or software components required
for a system or subsystem to function.
2.
Assignment of the operating parameters of a system, subsystem, or device. For
example, disk array configuration includes designating the member disks or extents
for the array, as well as setting parameters such as stripe depth, RAID model, and
cache allowance.