<s>
In	O
computer	O
log	B-Application
management	I-Application
and	I-Application
intelligence	I-Application
,	O
log	B-Application
analysis	I-Application
(	O
or	O
system	O
and	O
network	O
log	B-Application
analysis	I-Application
)	O
is	O
an	O
art	O
and	O
science	O
seeking	O
to	O
make	O
sense	O
of	O
computer-generated	O
records	O
(	O
also	O
called	O
log	O
or	O
audit	O
trail	O
records	O
)	O
.	O
</s>
<s>
Typical	O
reasons	O
why	O
people	O
perform	O
log	B-Application
analysis	I-Application
are	O
:	O
</s>
<s>
Hence	O
,	O
log	B-Application
analysis	I-Application
must	O
interpret	O
messages	O
within	O
the	O
context	O
of	O
an	O
application	O
,	O
vendor	O
,	O
system	O
or	O
configuration	O
to	O
make	O
useful	O
comparisons	O
to	O
messages	O
from	O
different	O
log	O
sources	O
.	O
</s>
<s>
Hence	O
,	O
log	B-Application
analysis	I-Application
practices	O
exist	O
on	O
the	O
continuum	O
from	O
text	O
retrieval	O
to	O
reverse	O
engineering	O
of	O
software	O
.	O
</s>
<s>
In	O
log	B-Application
analysis	I-Application
,	O
this	O
means	O
recognizing	O
and	O
ignoring	O
the	O
regular	O
,	O
common	O
log	O
messages	O
that	O
result	O
from	O
the	O
normal	O
operation	O
of	O
the	O
system	O
,	O
and	O
therefore	O
are	O
not	O
too	O
interesting	O
.	O
</s>
<s>
Log	B-Application
Analysis	I-Application
is	O
often	O
compared	O
to	O
other	O
analytics	O
tools	O
such	O
as	O
application	B-Application
performance	I-Application
management	I-Application
(	O
APM	O
)	O
and	O
error	O
monitoring	O
.	O
</s>
<s>
Error	O
monitoring	O
is	O
driven	O
by	O
developers	O
versus	O
operations	O
,	O
and	O
integrates	O
into	O
code	O
in	O
exception	B-General_Concept
handling	I-General_Concept
blocks	O
.	O
</s>
