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Conference orarep::nomahs::rdb_60

Title:	Oracle Rdb - Still a strategic database for DEC on Alpha AXP!
Notice:	RDB_60 is archived, please use RDB_70..
Moderator:	NOVA::SMITHISON

Created:	Fri Mar 18 1994
Last Modified:	Fri May 30 1997
Last Successful Update:	Fri Jun 06 1997
Number of topics:	5118
Total number of notes:	28246

4999.0. "Q: RMU/COPY " by ORAREP::OSOSPS::HIRAIWA (Yoshitaka Hiraiwa/SPS) Wed Feb 05 1997 06:17

Hi, I have a question about channelcnt and Rdb.

My customer uses Rdb/VAX V6.01-5 on VMS V6.1.
They created the database that has 2266 storage areas.
The create statement and rmu/backup work fine. But they did RMU/COPY and gets
the following error.

-RMS-F-CHN, assign channel system service request failed

Is this a restriction or not?
Anyway, I told them to reduce the number of areas under 1950.

Channelcnt, sysgen parameter, is 2047. this is the maximum value.

Best regards,
Yoshitaka Hiraiwa/SPS/MCS/Japan

T.R	Title	User	Personal Name	Date	Lines
4999.1	do they have an alpha in the cluster	UKVMS3::SHISCOCK	stand and deliver	`Wed Feb 05 1997 07:15`	3
	If they have an axp it may be easier. AXP (vms7) has a max channelcnt of 65k.
4999.2		HOTRDB::PMEAD	Paul, [email protected], 719-577-8032	`Wed Feb 05 1997 09:35`	2
	I don't know for sure, but I bet RMU opens all areas in both the source and destination database. That will be a LOT of channels.
4999.3	Maybe somebody can remember	svrav1.au.oracle.com::MBRADLEY	I was dropped on my head as a baby. What's your excuse?	`Wed Feb 05 1997 18:29`	14
	> <<< Note 4999.2 by HOTRDB::PMEAD "Paul, [email protected], 719-577-8032" >>> > > I don't know for sure, but I bet RMU opens all areas in both the source > and destination database. That will be a LOT of channels. Used to be that Rdb had a hard limit of around 256 (or was it 512) rda and snp files open. I know the limit was raised, but I can't remember in what version. Anyway, You've got one heck of a lot of storage areas! G'day, Mark.
4999.4		HOTRDB::LASTOVICA	Is it possible to be totally partial?	`Wed Feb 05 1997 23:18`	5
	the current version of Rdb (and the current ECOs too) allow for 2047 channels on VAX (the VMS limit) and a 'basically' unlimited number of Alpha (8k?). Remember that each storage area really is two files (the .RDA file and the .SNP file) so the limit is really about 1000 storage areas open at a time.
4999.5	Then this is his problem	svrav1.au.oracle.com::MBRADLEY	I was dropped on my head as a baby. What's your excuse?	`Thu Feb 06 1997 00:22`	16
	><<< Note 4999.4 by HOTRDB::LASTOVICA "Is it possible to be totally partial?" >>> > > the current version of Rdb (and the current ECOs too) allow for > 2047 channels on VAX (the VMS limit) and a 'basically' unlimited number > of Alpha (8k?). Remember that each storage area really is two files > (the .RDA file and the .SNP file) so the limit is really about 1000 > storage areas open at a time. So 2236 storage areas would be at least 4473 channels and on vax that is too many. Now the question is, is this the cause of his error. G'day, Mark.
4999.6	my guesses	HOTRDB::LASTOVICA	Is it possible to be totally partial?	`Thu Feb 06 1997 09:45`	5
	It is likely either that or a lack of one of: FILLM CHANNELCNT BYTELM