Just the sort of info I need to know, thanks! -----Original Message----- From: ADSM: Dist Stor Manager [mailto:[email protected]] On Behalf Of Steven Harris Sent: Thursday, October 20, 2011 8:07 AM To: [email protected] Subject: Re: [ADSM-L] Dedup for DB's?
On 19/10/2011 4:18 AM, Prather, Wanda wrote: > Just asking. > As I recall, the announcements for client-side dedup said it is supported by > the API, so therefore should work with TDP's. > Has anybody achieved (or attempted?) significant improvements in throughput > with backup of large DB's using client-side dedup? > > Wanda Prather | Senior Technical Specialist | > [email protected]<mailto:[email protected]> | www.jasi.com<www.jasi.com%20> > ICF Jacob& Sundstrom | 401 E. Pratt St, Suite 2214, Baltimore, MD > 21202 | 410.539.1135 > Of course Wanda there is a gotcha. CLIENTDEDUPTXNSIZE server option restricts the size of the object that can be client deduped, and it is, at 6.2.3 restricted to 1TiB maximum. For some DBMS that may not be a problem, e.g Oracle breaks its backups into backuppieces of a certain size, but for a big DB2 database its an issue as that baby comes down in one transaction. Its a little disappointing that such limits exist. Regards Steve Steven Harris TSM Admin Canberra Australia
