Hi,
Oracle documentation says:
"The level of multiplexing for a particular channel is determined by the
minimum of the parameters FILESPERSET (default is
64), MAXOPENFILES (default is 8), and the number of files backed up on
the channel (if specified)."
OK, I understand: FILESPERSET and MAXOPENFILES, but what is the third
item: "number of files backed up on the channel"? I thought
that was controlled by FILESPERSET. Are they talking about a third
parameter? What is it called?
For example, if I have 2 channels and I specify filesperset 5 then I'm
going to end up backing up 5 files per channel simultaneously. On
NetWorker, I'll see 2 RMAN savesets writing to the drive at the same
time since I have 2 channels. If I have 26 database files, and I'm
running a full, I'll end up with 6 savesets at 5 files per set. The
MAXOPENFILES defaults to 8 (per channel) so I don't
need to specify that since 5 is less than 8. I've tested this, and this
is what I've seen.
BUT: what, in this case, is controlling "number of files backed up on
the channel" other than FILESPERSET?
We're not specifying MAXPIECESIZE or MAXSETSIZE. Is there some third
parameter they're not mentioning but somehow
inferring?
I must be missing something blatantly obvious here. Frying pan hitting
my head repeatedly like on those smilies?
george
--
George Sinclair - NOAA/NESDIS/National Oceanographic Data Center
SSMC3 4th Floor Rm 4145 | Voice: (301) 713-3284 x210
1315 East West Highway | Fax: (301) 713-3301
Silver Spring, MD 20910-3282 | Web Site: http://www.nodc.noaa.gov/
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