DB2 V9 MigrationDB2 V9 Migration Dexia Technology … GSE DB2V9 migration... · DB2 V9 MigrationDB2...

DB2 V9 MigrationDB2 V9 Migration Dexia Technology Services Alain Pary – DBMS DB2Alain Pary DBMS DB2Gent, March 2010

DB2 V9 Migration Dexia configuration

• Datasharing (3 Way in production)./OSZ/OS 1.9

• object by Environment (5 env PRD/UAT/GTU/PTP/TST) .6022 Tablespaces6022 Tablespaces

26143 Table partitions

13719 Indexes

35011 Index partitions

11750 Tables

• Space allocated by env.PRD : 8.3 T ; UAT 0.4 T ; PTP 2.0 T ; GTU 0.4 T ; TST 0.4 T

2 Pary Alain DBMS DB2 Dexia Technology Services

DB2 V9 Migration Activity Keys numbers in production

• BP pages 28 Giga

• GBP capacity 16 Giga

• Get pages 16 billions per days

• SQL 8 billions per days

• commit 80 millions per days

• log volume 170 X 1600 Cylinders


DB2 V9 Migration Calendar

Environment DB2 V9 CM DB2 V9 NFM

Tgt : DB2 for System team 14/02/2009 18/07/2009

Ptp : performance test for

Critical applications07/03/2009 08/08/2009

Gtu : functional test 28/03/2009 29/08/2009

Uat : user acceptance test 18/04/2009 19/09/2009

Prd : production 23/05/2009 07/11/2009

Tst : development 13/06/2009 05/12/2009Tst : development 13/06/2009 05/12/2009


DB2 V9 Migration Constraint development

• UAT (01/01 – 03/10)V9CM V9NFM

P24 P25 P26 P27

• PRD (14/03 – 21-11)• PRD (14/03 21-11)

V9CM V9NFM

P24 P25 P26 P27


DB2 V9 Migration Intervention in production

• All the members are stopped.

• start one member in access(maint)To avoid concurrency on catalog.

To avoid abnormal behaviour in user programTo avoid abnormal behaviour in user program.

• Go to version 9 in CM or NFM mode New loadlib procedures hold actionNew loadlib, procedures, hold action..

Dexia IVP , check the interface.

• Start the first member in access(*)

• Inject the maintenance in the other members

• start all the members in access(*)( )


DB2 V9 Migration Basic Row Format (BRF) or Reordered Row Format (RRF)

• A new format in DB2 V9 : Reordered Row Format .

With RRF you do not have to worry about the order of columns within the row.You can specify

the order however you wish and DB2 automatically reorders the columns within the row andthe order however you wish, and DB2 automatically reorders the columns within the row and

places all of the variable length columns at the end of the physical row within the data page.

Instead of storing the columns with their length, DB2 stores all of the offsets for the variable

length columns in an area following the last fixed length column and prior to the first variable

length column. DB2 can now directly access each variable length column and know its length

b d i i l l l ti ith th ff t I t thi i h ffi i tby doing simple calculations with the offsets. In most cases this is a much more efficient way

to process individual varying length columns.



• Table definition

• data insert



• Table content (via SQL)



• DB2 BRF (dump of page)



• DB2 BRF (dump of page)

It is not really readable so transform it



• DB2 BRF BY ROW



• DB2 BRF BY ROW Record length




Length Varchar1




Length Varchar1

Varchar1




Length Varchar1

Varchar1

Length Varchar2




Length Varchar1

Varchar1

Length Varchar2

Varchar2




Length Varchar1

Varchar1

Length Varchar2

Varchar2

Char1




Length Varchar1

Varchar1

Length Varchar2

Varchar2

Char1

Char2Char2



• DB2 RRF (dump of page)



• DB2 RRF BY ROW



• DB2 RRF BY ROW Record length




Offset Varchar1




Offset Varchar1

Varchar1




Offset Varchar1

Varchar1

Offset Varchar2




Offset Varchar1

Varchar1

Offset Varchar2

Varchar2




Offset Varchar1

Varchar1

Offset Varchar2

Varchar2

Char1




Offset Varchar1

Varchar1

Offset Varchar2

Varchar2

Char1

Char2Char2




Offset Varchar1

Varchar1

Offset Varchar2

Varchar2

Char1

Char2Char2

Length Varchar1




Offset Varchar1

Varchar1

Offset Varchar2

Varchar2

Char1

Char2Char2

Length Varchar1Offset varchar2-offset varchar1




Offset Varchar1

Varchar1

X’0D’ – X’0B’ = X’02’=2

Offset Varchar2

Varchar2

X’15’- X’0B’ = X’0A’ = 10

Char1

Char2X’0B’ – X’0B’ = X’00’ = 0

Char2

Length Varchar1Offset varchar2-offset varchar1 X’10’ – X’0B’ = X’05’ = 5X 10 – X 0B = X 05 = 5


X’15’- X’0B’ = X’0A’ = 10



Offset Varchar1

Varchar1

Offset Varchar2

Varchar2

Char1

Char2Char2


Length Varchar2Rec Length – 6 – offset varchar2




Offset Varchar1

Varchar1

Offset Varchar2

Varchar2

Char1

Char2Char2


Length Varchar2




Offset Varchar1

Varchar1

X’16’ - X’06’ – X’0D’ =

X’03’ = 3

Offset Varchar2

Varchar2

X’25’- X’06’ - X’15’ =

X’0A’ = 10

Char1

Char2X’12’ – X’06’ - X’0B’ = Char2


X’01’ = 1

Length Varchar2Rec Length – 6 – offset varchar2

X’1C’ – X’06’ - X’10’ =

X’06’ = 6


X’1B’- X’06’ - X’15’ =

X’00’ = 0


Catalog impact

SYSIBM.SYSTABLEPART table

Format Char(1) not null with default

Indicates the format of the rows in the table space or partition

R Indicates reordered row format

blank Indicates basic row format or a LOB tablespace



Mixed format within partition of a tablespaceAft d it’ diffi lt t th d tAfter a drop it’s difficult to recover the data.Only one format possible at creation via Zparm positionning.

For DSN1COPY between DB2 the Format must be synchronised.o S CO be ee e o a us be sy c o sed



APAR PK85881, PK87348

. ZPARM impact

Hidden DSNZPARM SPRMRRF will be converted to an opaque, online changeable DSNZPARM Default value will remain SPRMRRF=ENABLEchangeable DSNZPARM. Default value will remain SPRMRRF=ENABLE.

• new statement for load and ReorgROWFORMATROWFORMAT

RRFBRF

•Messages| DSNU1173I | csect-name TABLE SPACE dbname.tsname WILL BE CONVERTING | FROM row-format1 TO row-format2 DSNU1174I | t TABLE SPACE db t WILL REMAIN IN | f t DUE TODSNU1174I | csect-name TABLE SPACE dbname.tsname WILL REMAIN IN | row-format DUE TO explanation Sample : DSNU1173I -SD1S 060 18:21:24.44 DSNURFIT - TABLE SPACE DSN00014.RRFFORMA WILL BE CONVERTING FROM BASIC ROW FORMAT TO REORDERED ROW FORMAT



Conclusion

PTF must be installed to control the format of TS.Mixed format TS must be avoid.RRF management is not enough user driven.RRF management is not enough user driven.– not like compression (alter, keep dict).RRF will be implementedRRF will be implemented.


DB2 V9 MigrationDB2 V9 Migration Dexia Technology … GSE DB2V9 migration... · DB2 V9 MigrationDB2...

Documents

Transcript of DB2 V9 MigrationDB2 V9 Migration Dexia Technology … GSE DB2V9 migration... · DB2 V9 MigrationDB2...