Logical time Some notes on Distributed Systems Written while studying the course Distributed Systems at IIIT Hyderabad, by professor Kishore Kothapalli. The book used is Distributed Computing: Principles, Algorithms, and Systems by Ajay D. Kshemkalyani and Mukesh Singhal.

1. LOG1CAL TIME
ScAnr ime logrent kme 8 te captsre nugntty oh e t s n diktrikuHad
ve cker hime Systens, phgsitnt tne à net aeunate cneuyh
metrtc fime
necesy ber Knetolesdge e usnlt
dlstr w fed ntg erethm dgh
vmsS atvnss in matml enciuzkn algvithms
mintain steney tn pitafod olsfabharcs
Af sesgh terrec dielieck oefettbn
agrt
auephanten and ondetecttd dadiecks
yacking 6 epeeent evovts
VSu
ming eehecLN bA, *n
fure v
ad ih detection of ledncoirgistenc cs in dtof natie erk peveitie ning
Kmacledga aeot pege5
ducerdi ng eelerc nbevmation
0ore otlectitn
atren etetecon
Cencorren cywdegure
t cleck C:H T mede n
cieck censictency cenditen
ce)CCei)
o&consertent
cCe) C)

2. datagt rueturs pretecel
Ce represtnt tgt ome) Cupdnte data to ensorc ee ngisfen ondn.)
Tecal eleck un proJ pdathng fetat cleck
go bal tiecklecat vie or s
2pdatins i e n ced
SCALAR TIME
La
m
lecal clocK & local v ob globnt me
nrg
ECC+a R2 Ct max
CCe,Cmag
on ntorna, sond 3 Geoute RI
deliver mág
ten ruieve
foteilordtring n possta evont
ceun n mung pstea
fomesiampt : * t,t) , j d
strong cnsStency
v
avents tuih Sam d0alar tome ert dholepndtont
tie-bvanin9 chaniSm vA a

3. JECTOR TIME
Fodgt attrn Jthmutn
bimt
BC Ce) CeCe] t d R C max CCi, Cmag)
en internel, 4tnd tere.cute Ri
delivor
Lon recieves
Ce tn CiCtn
C&C Yn GiEns Cgtn
CC G&C and. n CeC Ctn
Ci
1Somovphm uun unE &sntafinps STOn corsASTC re ss t ralud
evcnt cout
&
cand memeg. saah gad Ariespants, anaarsmy thatpnts

4. LFEICIENT IMPLEMENTATIONS OF VECIOR OCKS
SINGHAL KSHEMKA LYANII DIEFERENTIAL TECHNIQUE
osc vothion: bctuoeen fucLeasive sendt to pmepeprocess, ony e cnv
vEctor clock cat SUnlcr Proces charg eg
LS: lost sont LU. Los upclof
value oral ctock tohen Pe tst Scnt vafueeglecalcleK whan P
cpcoteol
masng te P vEAp¢ctV entr o t ClecK
CPc) dom cn be Send tn em o tuplal instcad of ful vecro.
MATRIX TIME
Cabl
Cirid
P
lacal Clec
( C -vuerdleck
FCttc] maCCE1, Cm i,.ten tntnel, Aondy Ci max
CCr, Cag)
x t t e Ri
a. deliver ms
.disrand ebsolete inhor mation C,Caul>t e prece4 knous thnt

5. PHYStCAL CLec &YNCHRONIZATION MTP
n e n eb tine, intervaL, and relative enslering o evots d e **
tect tes, penvedi'e clock nchitation easn i
ton Ca.Ct) 6quen y Ca C)
m Cleck
ow macy
t
a tohrth clech
pregreue
o6sat aGt) - t Sk Ca' Ct) -
tome dibb. cwrt rtal me att li6 to prject clock
drita'e)
attaterahen
a cleck vogress
UTC t
tuur K mi prcfel CHTP) Do itmet
NTP involves a hievvehrmre.e *
crversHert, poas A,& *h
inylu en
'a lenHy calcakatc deng. &
H6set uging a
Srk
bidirachie na' naage nn.66et e wre )
eundrp
AnidÁnt he Pair twith min.&
Ischesen.
(T,T)-(TT