June 2018
Intermediate to advanced
478 pages
10h 52m
English
Content preview from IBM Db2 11.1 Certification Guide
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A word about hardware accelerated backup
You can achieve hardware compression for Db2 backup images and log archive files on AIX POWER 7 and POWER 8 processors by using the nest accelerator NX842. This solution is only supported on AIX versions AIX V7 TL3 SP3 and AIX V6 TL9 SP3 or later.
To enable hardware backup compression by default, set the registry variable DB2_BCKP_COMPRESSION to NX842, otherwise you must specify the compression library libdb2nx842.a in the BACKUP command as follows:
db2set DB2_BCKP_COMPRESSION=NX842 -immediate OR BACKUP DATABASE sample ONLINE COMPRESS comprlib libdb2nx842.a;
You can also enable log archive compression by changing the logarchcompr1 or logarchcompr2 database configuration to NX842 as follows:
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