DB2 Row Archive Manager

Christina ShenIBM STL, San JoseFebruary 1999

DB2 RAM Introduction

z Application Data Grows With Timez Large Amount of Aged Data in Production

Tablesy Slows Down System Response Timey Increases Cost on

x System Usage,x DASD Space,x Maintenance

DB2 RAMUser Requirements

z DB2 RAM is Designed toy Keep the Size of Active Data Under Controly Improve Response Timey Reduce System and DASD Usagey Minimize Maintenancey Able to Access Archive Data as Need Arises

DB2 RAM Highlights

z Only selected rows are archivedz Not all columns of a row need to be

archivedz Rows from related tables can be archived

as a unitz Dump archive tablespaces to tape to free

up DASD space

DB2 RAM Highlights

z Restore the tablespaces to DASD duringretrieve request

z Manage all information about archive anddumped tablespaces for retrieve request

z Maintains the level indicator tablesz Different options of the original data

What Applications ShouldUse DB2 RAM

z Any application that has a lot of aged datay Credit, Insurance, Telephone Billing, Retail,

Airline, Medical Reports, ProductSpecifications, Order Specifications, Inventory

z Extract part of data to be used by adifferent set of applicationsy Same as above.

What Applications ShouldUse DB2 RAM

z Any applications whose data changes withtime, but would like to keep a snapshot ofthe data at various points.y Product Design / Modelingy Inventory Recordsy Researches

DB2 Row Archive Manager

Overview:Main FeaturesData StructureArchive LevelsDump Archive LevelsRestore Dumped ArchiveSelection Control

Application User

Retrieve Process

RetrieveData

Current Data

ArchiveProcess

ArchiveData

Main Features

Data Structure

One-to-onecorrespond

application & archive tablestablespaces tablespaces

Application Unit & Current Data

Application Unit &Archive Data

Archive Levels

Archive Tablespaces

ProductionTables Level n Level n-1…..Level 1

Archive Tables

Dump Archive Levels

Online TablespaceLimit

Current ArchiveActive Tablespaces

Closed ArchiveTablespaces

Dumped ArchiveTablespaces

Tape/DASD

25

24

21

20

19

18

1

Restore Dumped Archive

Restored DumpedArchived Tablespaces

Current ArchiveActive Tablespaces

Closed ArchiveTablespaces

Dumped ArchiveTablespaces

Tape/DASD

25

24

21

20

19

18

1

19

5

Selection Controls

Connect Keys

Production Tables

Top ProductionTable

Candidate KeyTable

Options on ProductionTable

z Movez Copyz Referz Delete

User Tasks

z Activities Required to do the Archive andRetrieve can be broken into 5 categories:

z Archive Request Specificationz Actual Archive Runz Retrieve Request Specificationz Actual Retrieve Runz Archived Tablespaces Management

DB2 RAM Libraries

z Detailed Dataset Prefixy IQX.V1R1M0

z Target Librariesy IQX.V1R1M0.S…

z Customization Librariesy IQX.V1R1M0.C...

DB2 RAM Libraries (cont.)

z CIQXCLST: TSO Clist Commandsz CICXCMDS: DB2 DDL, use with SPUF1z CIQXCNTL: MVS JCLs and Dataz SIQXAUTH: APF Authorized Load Libraryz SIQXDBRM: DB2 DBRMs for Binding Plans

DB2 RAM Libraries (cont.)

z SIQXISPM: ISPF/PDF Messagesz SIQXISPP: ISPF/PDF Panelsz SIQXLOAD: Program Load Libraryz SIQXPL1: PL/1 Code Segmentsz SIQXTXT: Compiler Output Modules

Demos DB2 RAM

Demos

February, 1999 (c)IBM Corporation

Archive Specification General Information DB2 RAM

-Table 1. Archive Definition Work Sheet - Gcnetal InTorrn;~~ior~

PDS for DCLGEN: IQX.CI;S.DCLGENI,

DATABASEsIQXDBCAl IQXDBCA2

-_STOGROUPs VACT ALIASsIQXSGOO 1 IQXTCAT

Volumes for DUMPVOLSER TYPE NAMEXTRAOl DASD 3390XTRA02 DASD 3390

VOLSER TYPE NAME

Volumes for RestoreVOISER TYPE NAMEXTRAOl DASD 3390XTRA02 DASD 3390

VOWER TYPE NAMK

February, 1999 (c)IBM Corporation 17

Archive ARCHEMP Work Sheet 1 DB2 RAM

Table 2. Archive Definition Work Sheet - Archive Spccilicaliotl ( I of 3 )

Archive Unit: ARCHEMP

Cand. Key Table DCLGEN nameIQXARCHEMP has to be the same as0000000 the archive name

ISQL Statement: Note. All CK table columns should hc in the select list.

SELECT SELECT HIREDATEHIREDATE FROM CFS.EMP FROM CFS.EMPWHERE YEAR(CURRENT DATE WHERE YEAR(CURRENT DATE -- HIREDATE) HIREDATE) =$I=$I

Prod. Table 1

CFSEMP

Prod. Table 2

Prod. Table 3

Prod. Table 4

DCLGEN

EMPT

IE Table

DCLGEN

IE Table

DCLGEN

IE Table

DCLGEN

IE Table

II< ‘fable Cols.

IE ‘I’ablr Cols.

IE l’ahlr Cols.

117117 I'ablcI'ablc Cols.Cols.

- -- -

February, 1999 (c)IBM Corporation 18

Archive ARCHEMP Work Sheet 2 DB2 RAM

Table 3. Archive Definition Work Sheet - Archive Spccilicafic~~( 2 of 3 )

Archive Unit: ARCHEMP

Set Structure:

r-EMPEMP

February, 1999 (c)IBM Corporation 19

-

Archive ARCHEMP Work Sheet 3 DB2 RAM

able 4. Archive Definition Work Sheet - Archive Specification ( 3 of 3 )

,rchive Unit: ARCI-IEMP

TOGROUP Name: IQXSTG02 Alias: TESTCAT Alias2: 11SNl>I<I)-_ ~-

bATABASEs: IQXDBCAl I Q X D B C A 2

‘rimary Dump MSVG Name: IQXDMPP Alias: TESTCAT

VOLSER Type NameXTRAOl D A S D 3 3 9 0XTRA02 DASD 3390

VOLSER Type Name

kcondary Dump MSVG Name: IQXDMPS Alias: TESTCAT

VOLSER Type NameIQXPOl T A P E 3 4 8 0IQXP02 TAPE 3480IQXSOI T A P E 3 4 8 0IQXSO2 TAPE 3480

VOLSER Type Name

lump Restore MSVG Name: IQXRSTP

VOLSER Type NameXTRAOl D A S D 3 3 9 0X T R A 0 2 DASD 3390

VOLSER Type Name

February, 1999 (c)IBM Corporation 20

SELECT * FROM CFS.EMP ORDER BY HIREDATE;SELECT * FROM CFS.EMP ORDER BY HIREDATE;

______ -__ +_________+_________+_________+_________+_____-_-_t_________t_________t____-----t---------t---------t---------t---------t---------t---------EMPNO FIRSTNAMEEMPNO FIRSTNAME MIDINTMIDINT LASTNAMELASTNAME DEPT PHONE DEPT PHONE HIREDATEHIREDATE JOBJOB EDLEVELEDLEVEL SEX BIRTHDATE SEX BIRTHDATE SALARYSALARY BONUSBONUS COMMCOMM---~~~_--t~___~-~--+--~------f--------~+---~~~_--t~___~-~--+--~------f--------~+ _________+_________+____-----+---------+~~~~~~~--+---------_________+_________+____-----+---------+~~~~~~~--+--------- t_________+__~~~--~~+-~~~-----+---------+---------t_________+__~~~--~~+-~~~-----+---------+---------200340200340 ROYROY200318200318 MICHELLEMICHELLE200810200810 DIANEDIANE2QQQll2QQQll DIVIDDIVID288280288280 EILEENEILEEN208220208220 REBAREBA208120208120 GREGGREG288330288330 HELENAHELENA280148280148 KIMKIM2QQ17Q2QQ17Q KIYOSHI KIYOSHI288470288470 ROBERTROBERT208.240208.240 ROBERTROBERT288410288410 KARENKAREN208411208411 ALANALAN2QQ4102QQ410 ANNE ANNE280430280430 HELLENHELLEN200488200488 CLAUDIACLAUDIA200448200448 ROYROY280420280420 AMYAMY208440208440 PETERPETER200428200428 GREGGREG200440200440 KINKIN208540208540 FRANKFRANK200538200538 SANDRASANDRA280510280510 DARADARA200510200510 PATRICIAPATRICIA200580200580 FAITHFAITH200548200548 JAMESJAMES200520200520 HEIDIHEIDI200570200570 STEVENSTEVEN200540200540 ZIAZIA200520200520 JIIllJIIll200511200511 JOHNJOHN

N

M

PP

NRR

RR

KK

ALONZOALONZOSPRINGERSPRINGERHEMMINGERHEMMINGERHEHMINGERHEHMINGERSCHWARTZSCHWARTZJOHNJOHNORLANDOORLANDOWONGWONGNATZNATZYAMAMOTOYAMAMOTOKUBINKUBINMONTEVERDEMONTEVERDELEELEEGREENEGREENEBERNSTEINBERNSTEINCERBYCERBYRI CHARDSCHARDSJORDANJORDANSTONESTONEFERRARAFERRARAMASSAMASSACHANCHANBINDABINDAYEPYEPHOCKNANHOCKNANS I S I NONNONBPYNTONBPYNTONSELCERSELCERMILLERMILLERGOLDSTEINGOLDSTEINJONESJONESIHAHALIHAHALCHENEYCHENEY

E21E21El1AQQAQQEl1DllAQQE21CQlDllDllD21El1AQQAQQE21El1E21Dll021AQQCQlE21E21AQOEl1El1D21011Dllco1AOQAQQ

5698 1947-85-05 FIELDREPFIELDREP3332 1964-89-121964-89-12 OPERATOR OPERATOR3978 1965-(31-81 SALESREPSALESREP3978 1965-81-01 SALESREPSALESREP8997 1967-83-24 OPERATOR OPERATOR0672 1968-88-291968-88-29 DESIGNER DESIGNER2167 1972-05-851972-05-85 CLERK CLERK2103 1976-Q2-231976-Q2-23 FIELDREPFIELDREP1793 1976-12-15 ANALYSTANALYST2898 1978-89-15 DESIGNER DESIGNER2898 1978-89-15 DESIGNER DESIGNER3780 1979-12-03 CLERKCLERK3332 1984-89-12 OPERATOR OPERATOR3978 1985-81-01 SALESREPSALESREP3978 1985-Ql-Ql SALESREPSALESREP2183 1986-82-23 FIELDREPFIELDREP8997 1987-03-241987-03-24 OPERATOR OPERATOR5698 1987-05-85 FIELDREPFIELDREP8672 1988-88-29 DESIGNER DESIGNER3780 1989-12-03 CLERKCLERK2167 1992-(35-85 CLERK CLERK1793 1996-12-15 ANALYSTANALYST5698 1998-05-11 FIELDREPFIELDREP2183 1998-85-11 FIELDREPFIELDREP3978 1998-85-11 SALESREPSALESREP3332 1998-05-11 OPERATOR OPERATOR8997 1998-05-111998-05-11 OPERATOR OPERATOR3780 1998-05-111998-05-11 CLERK CLERK0672 1998-05-11 OESIGNER OESIGNER2898 1998-85-111998-85-11 DESIGNER DESIGNER1793 1998-05-11 ANALYSTANALYST2167 1998-85-111998-85-11 CLERK CLERK3978 1998-05-11 1998-05-11 SALESREPSALESREP

16 M 1926-85-1712 F 1931-84-2118 F 1933-88-1418 H 1933-88-1417 F 1936-03-2818 F 1948-83-1914 M 1942-18-1814 F 1941-07-1818 F 1946-01-1916 I4 1951-01-8516 M 1971-81-8517 M 1954-03-3112 F 1951-84-2118 M 1953-08-1418 F 1953-88-1414 F 1961-07-1817 F 1956-83-2816 M 1966-85-1718 F 1968-83-1917 M 1974-83-3114 N 1942-18-1818 F 1966-01-1916 M 1956-05-1714 F 1961-87-1818 F 1953-08-1412 F 1951-04-2117 F 1956-03-2817 1.1 1974-03-3118 F 1968-03-1916 I.1 1971-01-0518 F 1966-01-1914 1.1 1942-10-1818 kl 1953-08-14

2384Q.QQ2384Q.QQ 588. QQ 1907.08159QQ.QQ 300. QQ 1272.0046580.08 lQQQ.QQ 4220.8046580.88 1008. QQ 4228.8026250.8026250.80 588. QQ 2188.8829848.8029848.80 688.688. QQ 2387.8829250.8029250.80 688. QQ 2348.8025378.8825378.88 5QQ. QQ 2838.8828420.0828420.08 6QQ. QQ 2274.QQ24680.0824680.08 580. QQ 1974.0824680.0824680.08 588. QQ 1974.8828768.0828768.08 688. QQ 2381.8815908.8815908.88 388. QQ 1272.8046580.0846580.08 1088. QQ 4220.8846588.8046588.80 1888.80 4228.8825378.8825378.88 5QQ.88 2838.0026258.8626258.86 5QQ.80 21QQ.QQ23848.8823848.88 588.88 19Q7.8029840.8829840.88 688.88 2387.8828760.0828760.08 688.08 2301.882925Q.882925Q.88 6QQ.00 2348.8028428.8828428.88 6QQ.QQ 2274.082384Q.QQ2384Q.QQ 588.80 1907.0825378.8825378.88 508.88 2838.8846580.0046580.00 lOQQ.QQ 4220.0815900.80 308.00 1272.0026258.00 508.00 2180.0028768.0028768.00 688.80 2301.0029840.8029840.80 680.00 2387.0024680.8024680.80 500.08 1974.0028420.0828420.08 600.00 227-l.002925Q.002925Q.00 608.00 2340.0056588.0056588.00 lQQQ.OQ -1220.00

XIIEGlOI NUMBER OF NUMBER OF RO\,lSRO\,lS DISPLAYED IS 33 DISPLAYED IS 33

SELECT * FROM SELECT * FROM SYSADM.19XARCHEHPOBB0002SYSADM.19XARCHEHPOBB0002 ORDER BY HIREDATE; ORDER BY HIREDATE;

-_-______+-----_---+---------+---_-_-______+-----_---+---------+---_ -____+_______--+---------+-____+_______--+---------+ _________+_________+_________+______---+~~~~~~~~~+~_~------+---------+---------+---------_________+_________+_________+______---+~~~~~~~~~+~_~------+---------+---------+---------EMPNO FIRSTNAMEEMPNO FIRSTNAME MIDINTMIDINT LASTNAMELASTNAME DEPT PHONE DEPT PHONE HIREDATEHIREDATE JOBJOB EDLEVELEDLEVEL SEX BIRTHDATE SEX BIRTHDATE SALARYSALARY BONUSBONUS COMMCOMM-________+_-__-____+_________+-_________t_________t_________+_________t_________~_'__------t---------t---------t---------t---------t---------t----------________+_-__-____+_________+-_________t_________t_________+_________t_________~_'__------t---------t---------t---------t---------t---------t---------208348208348 ROYROY2BB31B2BB31B MICHELLE MICHELLE2BOB112BOB11 DIVIDDIVID2BBBlB2BBBlB DIANE DIANE208280208280 EILEENEILEEN208220208220 REBAREBA208128208128 GREGGREG288330288330 HELENAHELENA280148280148 KIMKIM288478288478 ROBERTROBERT2BB1702BB170 KIYOSHI KIYOSHI

RR ALONZOALONZOFF SPRINGERSPRINGERPP HEMMINGERHEMMINGERJJ HEMMINGERHEMMINGERRR SCHWARTZSCHWARTZKK JOHNJOHN

ORLANDOORLANDOWONGWONG

NN NATZNATZKUBINKUBINYAMAMOTOYAMAMOTO

21302492130249 ROBERT ROBERT NN MONTEVERDEMONTEVERDE2BB4102BB410 KAREN KAREN FF LEELEE200411200411 ALAN ALAN PP GREENEGREENE2BB41B2BB41B ANNE ANNE JJ BERNSTEINBERNSTEIN200430200430 HELLENHELLEN CERBYCERBY208488208488 CLAUDIA CLAUDIA RR RICHARDSRICHARDS280440280440 ROY ROY RR JORDANJORDAN208420208420 AMY AMY KK STONESTONE288440288440 PETER PETER MM FERRARAFERRARA280428280428 GREG GREG TT MASSAMASSA200440 KIN200440 KIN NN CHANCHAN

DSNE6101DSNE6101 NUNBERNUNBER OF ROWS DISPLAYEO IS 22 OF ROWS DISPLAYEO IS 22

E21E21 5698 1947~m-05 FIELDREPFIELDREPEl1 3332 1964-09-12 OPERATOROPERATORA00 3978 1965-01-01 SALESREPSALESREPA00 3978 1965-01-U SALESREPSALESREPEl1 8997 1967-03-24 OPERATOROPERATOR011 0672 1968-08-29 DESIGNERDESIGNERA00 2167 1972-05-05 CLERKCLERKE21 2103 1976-02-23 FIELDREPFIELDREPCO1 1793 1976-12-15 ANALYSTANALYST011 2890 1978-09-15 DESIGNERDESIGNER011 2890 1978-09-15 DESIGNERDESIGNERD21 3780 1979-12-03 CLERKCLERKEl1 3332 1984-09-12 OPERATOROPERATORA00 3978 1985-01-01 SALESREPSALESREPA00 3978 1985-01-U SALESREPSALESREPE21 2103 1986-02-23 FIELOREPFIELOREPEl1 8997 1987-83-24 OPERATOROPERATORE21 5698 1987-05-05 FIELDREPFIELDREP011 0672 1988-08-29 DESIGNERDESIGNER021 3780 1989-12-83 CLERKCLERKA00 2167 1992-05-05 CLERKCLERKco1 1793 1996-12-H ANALYSTANALYST

16 M12 F18 M18 F17 F18 F14 M14 F18 F16 H16 M17 N12 F12 F18 18 MM18 F14 F17 F16 M18 F17 M14 M18 F

1926-05-17 23840.001931-04-21 15900.001933-08-14 46500.001933-08-14 46500.001936-03-28 26250.001948-03-19 29840.001942-10-18 29250.001941-07-18 25370.001946-U-19 28420.001971~01-05 24680.001951-01-05 24680.0131954-03-31 28760.001951-04-21 159oo.oEl1953-08-14 46500.001953-08-14 46500.001961-07-18 25370.001956-83-28 26250.081966-85-17 23840.001968-03-19 29840. OEI1974-03-31 28760.001942-10-18 2925El.m1966-01-19 28420.00

1987.861987.861272.004220.004220.002100.002387.002340.002030.002274.001974.881974.002301.001272.004228.004220.002030.0021BO. 001907. I302387.802301.882340.002274.00

SELECT EMPNO, SELECT EMPNO, FIRSTNANE,HIDINTFIRSTNANE,HIDINT ,LASTNANE, HIREDATE, DEPT ,LASTNANE, HIREDATE, DEPTFROM RETRIEVE.EMP ORDER BY HIREDATE;FROM RETRIEVE.EMP ORDER BY HIREDATE;

______,.__+_______-_ +_________+_________+-______-_+--______-~_+~~~~~~--~+~~------~~~~-------+-~~~----- +_________+_________+_______-_+-EMPNO FIRSTNAMEEMPNO FIRSTNAME MIDINT MIDINT LASTNAMELASTNAME HIREDATEHIREDATE DEPTDEPT___----_____----__ +--------_+_---_----+--------_+_---_---- +_________+_______~_+_____~_~f--____----~+~~~~~---~+~~~~-----+~~~~-----+_________+_______~_+_____~_~f--____----~+~~~~~---~+~~~~-----+~~~~----- +_________+_________+_________+-+_________+_________+_________+-288348288348 ROY ROY RR ALONZOALONZO288318288318 MICHELLE MICHELLE FF SPRINGERSPRINGER2BBBll2BBBll DIVIDDIVID PP HEMMINGERHEMMINGER2BDDlB2BDDlB DIANE DIANE JJ HEMHINGERHEMHINGER20028G20028G EILEEN EILEEN RR SCHWARTZSCHWARTZ28022'328022'3 REBA REBA KK JOHNJOHN2BQ12B2BQ12B GREG GREG ORLANDOORLANDO2BB33B2BB33B HELENA HELENA WONGWONG280140280140 KIM KIM NN NATZNATZ208478208478 ROBERT ROBERT KUBINKUBIN2QB17B2QB17B KIYOSHI KIYOSHI YAMAMOTOYAMAMOTO208248208248 ROBERT ROBERT t4t4 MONTEVERDEMONTEVERDE208418208418 KAREN KAREN FF LEELEE280411 ALAN280411 ALAN PP GREENEGREENE2BD41B2BD41B ANNE ANNE JJ BERNSTEINBERNSTEIN208430208430 HELLENHELLEN CERBYCERBY288488288488 CLAUDIA CLAUDIA RR RICHARDSRICHARDS2BD44B2BD44B ROY ROY RR JORDANJORDAN208428208428 AMY AMY KK STONESTONE203448203448 PETER PETER MM FERRARAFERRARA288428288428 GREG GREG TT MASSAMASSA280448280448 KIM KIM NN CHANCHAN

DSFlE6101DSFlE6101 EIlJt~l8ER OF ROWS DISPLAYED IS 22

1947-05-851947-05-85 E21 E211964-09-12 1964-09-12 El1El11965-01-01 AGOAGO1965-01-01 ADDADD1967-83-241967-83-24 EII1968-W-29 D111972-05-05 A001976-02-23 E211976-12-15 CO11978-09-15 Dll1978-09-15 0111979-12-03 D211984-89-12 El11985-01-01 A001985-01-01 A001986-02-23 E211987-03-24 El11987-05-05 E211988-W-29 Dll1989-12-03 0211992-05-05 ADO1996-12-15 co1

Archive ARCHTI Work Sheet 1 DB2 RAM

Fable 5. Archive Delinition Work Sheet - Archive Spccificalion ( I of 3 )

irchive Unit: ARCI-IT 1

3and. Key Table DCLGEN name CK ‘I’ablc Cols.QXARCHT 1 has to be the same as)000000 the archive name ‘I’l’l’1~lCIA ‘1’1TB 1CLS

SQL Statement: Note. All CK table columns should lx in the sclcct list.

SELECT SELECT TlTBlCL4,TlTBlCL4, TlTBlCL5TlTBlCL5 FROM FROM CFS.TlTBlCFS.TlTBlWHEREWHERETlTBlCL4TlTBlCL4 ~100~100 and and TlTBlCL5TlTBlCL5 >> 1000;1000;

Prod. Table 1 DCLGEN IX Table Cols.

CFS.TlTB 1 TlTBl Tl’l’1~lC1,4

IE Table IJYI~I,

CFS.TlLX 1

Prod. Table 2 DCLGEN II’ ‘I’ablc Cols.

CFS.TlTB2 TlTB2 ‘1’1’1’1~2c:I ,4

IE Table I,1WI~l,

CFS.TlLX2

Prod. Table 3 DCLGEN 111: ‘I’:lblc Cols.

CFS.T lTB3 TlTB3

IE Table

Prod. Table 4 DCLGEN IE ‘I’ablc Cols.

IE Table

February, 1999 (c)IBM Corporation 24

Archive ARCHTI Work Sheet 2 DB2 RAM

Table 6. Archive Definition Work Sheet - Archiw Specilir;llioll ( 2 of 3 )

Archive Unit: ARCHT 11

Table Set Structure:

TlTBlTlTBl

TlTBlCL4TlTBlCL4 TlTBlCL4TlTBlCL4

iiTlTB2CL4TlTB2CL4

//

TlTB2TlTB2

vvTlTB3CL4TlTB3CL4

___...____..._

February, 1999 (c)IBM Corporation 25

Archive ARCHTI Work Sheet 3 DB2 RAM

‘able 7. Archive Definition Work Sheet - Archive Specification ( 3 of 3 )

bchive Unit: ARCIIT 1

5TOGROUP Name: IQXSTG02 Alias: TESTCAT

1ATABASEsz IQXDBCAl I Q X D B C A 2

Alias2: DSND131~- ~---

?rimary Dump MSVG Name: IQXDMPP Alias: TESTCA’I

VOLSER Type NameXTRAOI D A S D 3 3 9 0XTRA02 DASD 3390

VOLSER Type Name

Secondary Dump MSVG Name: IQXDMPS Alias: TESTCAT

VOLSER Type NameIQXSOl TAPE 3480IQXS02 TAPE 3480

VOLSER Type Name

Dump Restore MSVG Name: IQXRSTP

VOLSER Type NameXTRAOl D A S D 3 3 9 0XTRA02 DASD 3390

VOLSER Type Name

February, 1999 (c)IBM Corporation 26