failover definition by Wordo

Noun

An

automatic

switch

to

a

secondary

system

on

failure

of

the

primary

system

,

such

as

a

means

for

ensuring

high

availability

of

some

critical

resource

(

such

as

a

computer

system

),

involving

a

parallel

backup

system

which

is

kept

running

at

all

times

,

so

that

,

upon

detected

failure

of

the

primary

system

,

processing

can

be

automatically

shifted

over

to

the

backup

.