Path: utzoo!bnr-vpa!bnr-fos!bigsur!bnrgate!is2!marmen
From: marmen@is2.bnr.ca (Rob Marmen 1532773)
Newsgroups: comp.sys.apollo
Subject: Re: Apollo SR10 Registry Performance
Summary: THX, More info on registries
Message-ID: <127@bnrgate.bnr.ca>
Date: 23 Oct 89 19:55:27 GMT
References: <46574bed8.000f088@caen.engin.umich.edu>
Sender: news@bnrgate.bnr.ca
Lines: 34

Thanks for the reply. There are a couple of more pieces of information
that are relevant.

	1) We are running BETA sr10.2 regitries. This was needed to fix
	   a problem with a server responding 20 times to each registry 
	   request. The new registries fix that problem. This was quite
	   serious because we are 100% ethernet and the network load was
 	   phenominal. Also, HPApollo are working on an ethernet microcode
	   fix to cure a problem with short interpacket spacing.

	2) Our site is 100% BSD unix. This puts an additional load on the 
	   servers because the /etc files are now streams to the server.
	   It's amazing how many programs look at these files constantly.
	   The applications have not been modified to take in to account
	   that there are now network accesses instead of disk accesses.

Under sr9.7, we had a ratio of 1 registry for 35 nodes. In addition, the 
workstations were modified so that the /etc directory was resident on each
nodes. Otherwise the performance was unacceptable.

At this point, we are going to experiment with a ratio of 1 server for 20
workstations. It's just a guess, but we reason that since the unix programs
are going to constantly look at the /etc files, then the number of servers
should actually be greater than a sr9 site.

Any comments?  cheers,  rob...

PS. Again, thanks for the reply.


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| Robert Marmen             marmen@bnr.ca  OR             |
| Bell Northern Research    marmen%bnr.ca@cunyvm.cuny.edu |
| (613) 763-8244         My opinions are my own, not BNRs |