Huawei OceanStor S5600 Initial Configuration Manual page 130

B Glossary
Browser / Server
C
Cache
Cache hit ratio
Cache prefetch
strategy
CALL HOME
Captive screw
Cascade
CHAP
CloneGroup
Coffer
Coffer disk
Command device
Connected LUN
Consistency check LUN consistency check is an advanced maintenance function of the
Constant prefetch A cache prefetch strategy. The size of the data to be prefetched is the
B-2
An architecture that defines the roles of browser and server, where the
browser is the service request party and the server is the service provider.
A special area of memory, managed by a cache controller, which
improves performance by storing the contents of frequently accessed
memory locations and their addresses.
The ratio of directly accessed I/O from Cache to all the I/O operation
during the read operation.
According to the operation in which data has been read or is being read,
the required data is read from a disk into the cache in advance.
The function that devices send the detected critical events, such as faults,
to maintenance engineers through an E-mail or a short message.
After the screw is loosened, screw caps and bolts do not fall off the main
body.
Connect the OceanStor storage system to more disk subracks through
connection cables, thus expanding the capacity of the OceanStor storage
system.
Challenge handshake authentication protocol. An authentication
protocol based on the password. This protocol checks that a user has the
right to access a system by using a challenge.
The clone group includes one master LUN and at most eight slave
LUNs.
A technology for ensuring data security and integrity in the OceanStor
storage system. The hard disks in slots 0 to 3 serving as coffers, which
store the data of system configuration, data of alarm logs, and the data
in the cache that is not written to the disk when the system power is off
for emergency and alarm log data.
Physical storage media. It refers to the hard disks in slots 0 to 3 of the
controller subrack.
Command device for OceanStor Command Line Interface.
Logically consecutive LUNs are connected through connecting
multiple LUN space.
controller. Through the consistency check, the controller can check the
consistency of data on arrays in advance, that is, the validity and
integrity of data.
size as set. This strategy applies to the applications that require reading
data of a fixed size in a certain order. An example is the streaming media
demanded by multiple subscribers who use the same bit rate.
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Copyright © Huawei Technologies Co., Ltd.
OceanStor S5600 Storage System
Initial Configuration Guide
Issue 02 (2009-09-30)