overview enterprise replication

8/18/2019 Overview Enterprise Replication

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Informix Enterprise ReplicationOverview, Configuration,Monitoring

James EdmistonDatabase Consultant

Quest Information Systems, Inc.www.questinfosys.com

[email protected]


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Purpose

Identify key items witin te Informi! en"ineto confi"ure, monitor and trouble soot

Informi! Dynamic Ser#er Enter$rise%e$lication &E%'.


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Outline

( )#er#iew of Enter$rise %e$lication

( Ser#er Confi"uration

( %e$lication Confi"uration( *onitorin"

( +rouble sootin"

( Documentation


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Enterprise ReplicationOverview

rom I-* Enter$rise %e$lication &E%' or Continuous Data%e$lication &CD%' is a built/in, lo"ical lo" based, asyncronousmecanism to distribute can"es to s$ecific tables and rowsacross an arbitrary number of $artici$atin" nodes on a

transactional le#el. 0ses

( Data Dissemination / Distributin" data to oter sites

( Data Consolidation / Distributin" data to oter sites

( 1orkload 2artitionin" / Distributin" data to 3load balance3

( 1orkflow %e$lication / *o#in" data trou" a workflow $rocess

( ailo#er / 2ro#idin" an alternate en#ironment in case of failure


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Considerations

( Selectin" %e$lication model

4 2rimary5+ar"et

4 0$date 6nywere

( Conflict resolution7

( +o$olo"y

4 ully connected

4 8ierarcical


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Server Configuration

( Ser#er to Ser#er communications confi"ured about all5for allser#ers in#ol#ed in E%

4 5etc5osts

4 5etc5ser#ices

4 +rusted en#ironment

( 8osts.equi#

( .rosts

4 Sqlosts

( Ser#ers be members of ser#er "rou$s

( 0nique


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Server Configuration(disk space considerations

( 9o"ical lo"s

( E!tra database s$ace for C%C)9S and delete tables

( Dbs$aces for send and recei#e queues

( Dbs$ace for "rou$er $a"in" file

( Disk s$ace5directories for 6+S and %IS files


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Server Configuration(onconfig

onconfi" #ariables

CDR_EVALTHREADS 1,2 "#$%u$tor thr"$ds &p"r-cpu-#p,$ddition$%'

CDR_DSL(C)*A+T DS %oc.$it ti/"out &s"conds'CDR_0EEE 3456 $xi/u/ $/ount of /"/or7 for $n7 CDR 8u"u" &)b7t"s'

CDR_9+:C(;RESS 4 Lin %"#"% co/pr"ssion &-1 n"#"r, 4 non", 5 /$x'

CDR_SER+AL 4 S"ri$% Co%u/n S"8u"nc"

CDR_D CDR 8u"u" dbsp$c" &d"f$u%t s$/" $s c$t$%og'

CDR_0DATA_S


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ER Configuration

( Define ser#ers

( Define re$licates;

( Define $artici$ants;

;or use tem$late &define and reali


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ER Configuration

( cdr utility

4 See Quick %eference :uide

4 See E% :uide 4 6$$endi! 6

( =ee$ it sim$le

>. Define Ser#ers

?. Define +em$late

. %eali


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cdr Example # server

( Define Ser#er &first ser#er'

cdr d"fin" s"r#"r --conn"ct=ifx_db1 --id%"=4 --init g_group1

--$ts=Binfor/ixB$ts --ris=Binfor/ixBris

)%

cdr d"f s"r# c ifx_db1 i 4 -+ g_group1

-A Binfor/ixB$ts R Binfor/ixBris


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cdr Example # server (cont

( Define ser#er

cdr d"fin" s"r#"r --conn"ct=ifx_db2 --id%"=4 --init

--sync=g_group1 g_group2 --$ts=Binfor/ixB$ts --ris=Binfor/ixBris

)%

cdr d"f s"r# c ifx_db2 i 4 -+ S g_group1 g_group2

-A Binfor/ixB$ts R Binfor/ixBris


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ER Configuration (cont

( %e$licates

4 2artici$ants

4 *aster re$licate 4 Conflict resolution rules and sco$e

( %e$licate set

4 :rou$in" re$licates so tey a#e te samecaracteristics


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ER Configuration (cont

( +em$lates

4 Easier set u$ of re$lication wit lar"e numbers oftables to re$licate

4 Defines a "rou$ of master re$licates and are$licate set


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cdr Example (template

( dbtemplate 4 te name of te tem$late

( file / contains list of table names

cdr d"fin" t"/p%$t" dbt"/p%$t" --conf%ict=$%.$7s --scop"=ro.

--$ts --ris --/$st"r=g_group1

--d$t$b$s"=stor"s_d"/o

--fi%"=Binfor/ixBdbsch"/$txt

cdr r"$%i" t"/p%$t" dbt"/p%$t" g_group1

cdr r"$%i" t"/p%$t" dbt"/p%$t" g_group2


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Monitoring

( cdr utility

4 cdr list

4 cdr #iew

4 cdr error

( onstat commands

( *essa"e lo" &online lo"'


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Monitoring

SERVER +D STATE STATS 0EE C(99ECT+(9 CHA9ED

-----------------------------------------------------------------------

g_group1 1 Acti#" Loc$% 4g_group2 2 Acti#" Conn"ct"d 4 F$n 5 13G2G46

( cdr list A

4 %e$licate 4 %e$licate set

4 +em$late

( cdr list ser#


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( cdr #iew &new in >B.BB.0C' ou must first e!ecute IF)%*IGDI%5etc5syscdrsmiadd.sql on all nodes

&no connections allowed to syscdr or sysmaster'

cdr #i". I-c s"r#"rJ I-r int"r#$%J obK"ct&s' IoptionsJ

-c s"r#"r --conn"ct=s"r#"r conn"ct to s"r#"r

-r int"r#$% --r"p"$t=r"p"$t int"r#$% in s"conds

obK"ctsG %ist of obK"cts s"p"r$t"d b7 sp$c"

List of support"d obK"cts $nd th"ir suboptions $r"G

ddr

s"r#"rs

s"nd8

nif

$pp%7

rc#

ris

$ts

profi%" st$t"

$tsdir I-R -C -# -d -8J

risdir I-R -C -# -d -8J

-R r"p$ir

-C ch"c

-# #"rbos"

-d d"%"t" option for r"p$ir -8 8ui"t option for r"p$ir


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onstat /" o$tions

cat Hsco$e re$lname

2rint Enter$rise %e$lication "lobal catalo" information

cdr 2rint Enter$rise %e$lication statistics

dtc 2rint statistics for te Enter$rise %e$lication delete table cleaner

dss H 0D% 0D%!

2rint statistics about data sync treads and user/defined data ty$es

"r$ H 6EE!:99!**


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Message log (online log

13G2G24 CDR conn"ction to s"r#"r %ost, id 2, n$/" g_group2>

R"$sonG disconn"ct s"r#"r

13G2G24 CDR 9+: shutdo.n .$iting for 1 sit"&s' to disconn"ct

13G2G22 CDR 9+: shutdo.n .$iting for 4 sit"&s' to disconn"ct13G2G22 CDR 9+: Shutdo.nG conn"ctions $%% shutdo.n

13G2G22 CDR Th" 9+: sub-co/pon"nt h$s shut do.n

13G2G2M DDR Log Snooping - Shutdo.n

13G2G2 CDR shutdo.n co/p%"t"


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$%S and RIS files

( 6borted +ransaction S$oolin"

4 +ransactions tat fail to be a$$lied to te tar"etdatabase

( %ow Information S$oolin"

4 re$licate row data tat fails conflict resolution orencounters re$lication order $roblems


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$re &ou in s&nc'(courtes& IMMethod Description

Select count&;' 6 sim$le way to ceck if te row counts are te same. +is metod willnot tell you about rows tat are different. Consider settin" te isolationle#el to Ldirty readM before runnin" tis on a li#e table.

Select from &site 6'were 2= not in &site -'

+is metod will ceck te 2rimary =ey between sites. 8owe#er, it willnot ceck for data outside te 2= tat may a#e been u$dated.

Select from &site 6'were 2= not in &site -'and 6.crcols NO-.crcols

+is metod cecks te 2= and cecks for u$dates to oter row data bycom$arin" te sadow columns. 8owe#er, tis metod will only workwit re$licates wit timestam$ conflict resolution, and may not work wellin E% en#ironments wit more tan ? ser#ers.

0nload to files, tenuse diff to com$are

+is is a LmanualM o$eration and can be #ery time consumin". Consideronly as a last resort.

cdr ceck 0ses te cecksum&' udr to com$are full rows &>B.BB.!CP and abo#e'


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)etting ack in s&nc(courtes& IM

Method Description

8i" 2erformance 9oader +is is te fastest o$tion for lar"e data sets, but requires a "ood deal of setu$ before runnin". 0seLE!$ressM mode for data loads as it will load te C%C)9S data.

Dbim$ort5dbe!$ort Fot a "ood o$tion for E%. +ey require e!clusi#e access to te database and cannot be used wile E% isacti#e.

Dbload 6 "ood coice if you a#e a set of data tat needs to be re$licated to oter sites. Data loaded into acti#ere$licates will be re$licated.

)nunload5onload Fot a "ood fit wit E% acti#e. -ot utilities require database lo""in" to be off. +e table or databaseloaded cannot e!ist, as te utility creates it. 9astly, wen tables are loaded, tey do not retain anyinformation on constraints, tri""ers, and default #alues.

0nload59oad Data loaded into acti#e re$licates will be re$licated unless te transaction is started wit te followin"synta! -E:IF 1)%= 1I+8)0+ %E29IC6+I)F.

Select from &site 6' were2= not in &site -'

If you a#e a small set of data tat needs to be synced, tis may be a "ood o$tion. +ere are issues witlo""in" wic you sould be aware of before usin" tis metod.

0$date col> col> If your re$licate uses timestam$ conflict resolution, tis o$tion will u$date e!istin" any rows, and insert anymissin" rows.

Dro$ E%, -acku$,%estore, Start E%

+is o$tion requires an E% outa"e, but if you a#e a lar"e set of data and5or re$licates 4 tis o$tioninsures you will be in sync.

cdr sync Syncroni


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*ocumentation

( I-* Informi! Dynamic Ser#er Enter$rise%e$lication :uide

( 6dministrator :uide

( )nline

4 www.ibm.com5informi!

4 IDS Information Centers &by #ersion >B,>>.>B, >>.PB'

http://www.ibm.com/informixhttp://www.ibm.com/informix


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Summar&

( Informi! Dynamic Ser#er Enter$rise %e$lication

( Confi"uration &Ser#er and E%'

( *onitor

4 cdr, onstat, lo"s

( +rouble soot

4 cdr, onstat, lo"s

( Documentation


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+uestions'

James Edmiston

Database ConsultantQuest Information Systems, Inc.www.questinfosys.com

[email protected]

overview enterprise replication

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