ase 15 architecture diagram
TRANSCRIPT
Dat
a1
Log
Dat
a1
Dat
a1
Log
Dat
a
Log
Dat
a
Log
Dat
a
Log
Cac
he
™
4K
Mic
h Ta
lebz
adeh
Ver
sion
3, J
an 2
006
Use
r 1 L
og
Cac
he
Shar
ed M
emor
y
dbcc
db C
ache
*N
amed
Cac
he *
4K b
uffe
r poo
l *
ASE
Sta
tic
Ove
rhea
d
Proc
edur
e C
ache
Sho
rt te
rm m
emor
y ne
eds
Oth
ers
Has
h V
alue
s
16K
buf
fer p
ool *
-Obj
ect
P
erm
issi
ons
-Col
umn
Stat
sSyba
se
Ope
n C
lient
Engi
ne 0
Reg
iste
rsFi
le D
escr
ipto
rs/c
hann
els
CP
Us
CPU
s
Sto
red
proc
edur
es
Trig
gers
Cur
sors
Log
Cac
he
Run
nabl
e Ta
sk Q
ueue
Sle
ep Q
ueue
Lock
Cha
ins
Run
ning
Tas
k
Use
r N L
og
Cac
he
Exe
cutio
n P
lans
-Pro
cedu
res
-Vie
ws
ASE
Ex
ecut
able
Total Physical Memory (read-only)
Maximum Memory (Dynamic)
Fork
ForkEn
gine
1R
egis
ters
File
Des
crip
tors
/cha
nnel
sR
unni
ng T
ask
ASE
Ex
ecut
able
Engi
ne N
Reg
iste
rsFi
le D
escr
ipto
rs/c
hann
els
Run
ning
Tas
k
ASE
Ex
ecut
able
Syba
se
Ope
n C
lient
Appl
icat
ion
Ser
ver
Clie
nt P
C
Spar
e C
apac
ity
ASE
Inte
rnal
Thr
eads
Che
ckpo
int
Wor
ker(
s)M
ain
ASE
ch
eckp
oint
pr
oces
s.
Shu
tdow
n
Dea
dloc
k Tu
neC
heck
s pe
riodi
cally
for
dead
lock
s
Mirr
or
Han
dler
Dis
k m
irror
ing.
H
andl
es A
SE
spec
ific
mirr
orin
g
AST
C
Han
dler
(s)
Intra
-ser
ver
cros
s da
taba
se
two-
phas
e co
mm
it
Che
ckpo
int
Slee
pPe
rform
s pe
riodi
c ch
eckp
oint
s
HK
Was
hH
ouse
keep
er
job.
Was
hes
dirty
buf
fers
. R
uns
at C
PU
id
le ti
me
HK
GC
Hou
seke
eper
jo
b. G
arba
ge
colle
ctor
, ex
ampl
e de
lete
d ro
ws
HK
Cho
res
Flus
hes
tabl
e an
d a
ccou
nt
stat
istic
s.
Han
dles
tim
eout
of
det
ache
d tra
nsac
tions
Port
M
anag
erE
nabl
es
Dyn
amic
ally
to s
tart
and
stop
list
ener
s on
any
giv
en p
ort o
n a
per-
engi
ne b
asis
Net
wor
k H
andl
er(s
)Th
ere
are
as m
any
netw
ork
hand
ler
thre
ads
as th
ere
are
‘mas
ter'
ent
ries
in
the
inte
rface
s fil
e
mas
ter
Sys
tem
C
atal
ogue
&M
DA
Tabl
es
mod
elTe
mpl
ate
data
base
sybs
yste
mpr
ocs
Sys
tem
sto
red
proc
edur
es
sybs
yste
mdb
Two-
phas
e C
omm
it
sybs
ecur
ityA
SE
Aud
it
tem
pdb
Tem
pora
ry W
ork
Area
Add
ition
al
tem
pdbs
Syst
em D
atab
ases
Bac
kup
Serv
erTa
pe
ASE
Job
Sc
hedu
ler
ASE
C
onfig
Fi
le
ASE
R
un
Serv
er
File
ASE
Er
ror l
og
File
Inte
r-fa
ces
File
XP S
erve
r
Stan
dby
Engi
ne(s
)S
tand
by E
ngin
es
Use
r Dat
abas
es sysl
ogs
Dat
a C
ache
O
verh
ead
ULC, One Logical Page each
ASE
Inte
rnal
thre
ads
can
run
on a
ny e
ngin
e
Task
que
ue c
ycle
1-Sl
eep
queu
e2-
Run
nabl
e ta
sk q
ueue
3-R
unni
ng (o
n an
y En
gine
)4-
Slee
p qu
eue
Dat
a C
ache
(with
def
ault
2K p
age
exam
ple)
Use
r 1U
ser 1
thre
ad
initi
ates
“gro
up
com
mit”
and
flu
shes
the
Log
Cac
he
MR
UW
ash
Mar
ker
LRU
tem
pdb
Cac
he *S
pinl
ock
defa
ult d
ata
cach
e
Ope
ratin
g Sy
stem
Has
h Ta
ble
MRU/LRU strategy.
Asynchronous Write of dirty
buffers after the Wash Marker
Buf
fer a
gein
g
CD
DD
1
Initi
al N
etw
ork
Han
dsha
ke b
y an
y en
gine
3
Mas
ter D
evic
e
Net
wor
k af
finity
m
igra
tion
to th
e le
ast
load
ed e
ngin
e2
Par
titio
ned
cach
e
sybs
yste
mpr
ocs
devi
ce
tem
pdbs
, on
sepa
rate
dat
a &
log
devi
ces.
On
file
syst
ems
with
ds
ync
fals
e
Use
r dat
abas
es a
re b
uilt
on s
epar
ate
data
and
log
devi
ces.
Dat
abas
es c
an s
hare
mul
tiple
dev
ices
and
a
devi
ce c
an h
ave
frag
men
ts fr
om m
ultip
le d
atab
ases
Sepa
rate
dat
a an
d lo
g de
vice
s
Hot
loca
l or r
emot
e co
mpr
esse
d ba
ckup
s. P
assw
ord
prot
ecte
d. C
ross
-pl
atfo
rm d
ump
and
load
cap
abili
ty
ASE
reco
mm
ends
raw
dev
ices
. tem
pdbs
can
be
on
file
syst
ems,
tmpf
s or
ram
disk
s
Free
Mem
ory
To a
noth
er A
SE
Pen
ding
I/O
-Pro
cess
Wai
ting
for I
/O-P
roce
ss W
aitin
g fo
r loc
k-P
roce
ss s
ent t
o sl
eep
LRU
Stra
tegy
MR
U (f
etch
-and
-di
scar
d) s
trate
gy
CC
DC
Tran
spor
tabl
eda
taba
ses
Rep
Age
nt *
pick
s up
re
plic
ated
dat
a
Sysl
ogsh
old
tabl
e(D
ynam
ic)
Old
est o
pen
trans
actio
n
Dis
k
Offl
ine
Engi
nes
Lice
nse
Hea
rtbe
atC
heck
s an
d sy
nchr
oniz
es
licen
sing
info
rmat
ion
with
Lic
ense
Ser
ver
Lice
nse
Serv
er
*ind
icat
es
optio
nal s
etup
PLC
Flu
sher
*In
Asy
nchr
onou
s lo
g se
rvic
e, it
flus
hes
the
Use
r Log
Cac
he
to th
e Lo
g C
ache
Log
Writ
er *
In A
sync
hron
ous
log
serv
ice
it flu
shes
the
Log
Cac
he to
dis
k
Sta
tem
ent
Cac
he