Thats interesting. That suggests to me that on a restore, RMAN is decompressing the data on disk then writing to the destination (which would take two write operations), but during a backup they are compressing it in memory then writing to the destination (one write operation). Or do I misunderstand the implications? On Jan 15, 2008 1:30 PM, Jack van Zanen <jack@xxxxxxxxxxxx> wrote: > Nope, similar experience as you have > > > > Jack > > > > *From:* oracle-l-bounce@xxxxxxxxxxxxx [mailto: > oracle-l-bounce@xxxxxxxxxxxxx] *On Behalf Of *Juan Miranda > *Sent:* Wednesday, January 16, 2008 4:18 AM > *To:* oracle-l@xxxxxxxxxxxxx > *Subject:* RMAN Compression experiences > > > > Hi > > > > I tried RMAN compression and it seems to work fast (if you use parallel > channels) and very eficiently. > > I get a compress ratio of 10 to 1. > > > > Anyone have some negative experiences (bugs,etc.) working with it ?? > > > > > > Thanks. > -- Andrew W. Kerber 'If at first you dont succeed, dont take up skydiving.'