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- From: quayle@switch.rockwell.com (Bill Quayle)
- Newsgroups: comp.sys.sun.hardware
- Subject: 690+FDDI+SCSI--How fast?
- Keywords: Bus speed, NFS performance
- Message-ID: <1992Dec20.031435.18208@nb.rockwell.com>
- Date: 20 Dec 92 03:14:35 GMT
- Article-I.D.: nb.1992Dec20.031435.18208
- Sender: news@nb.rockwell.com
- Reply-To: quayle@switch.rockwell.com
- Organization: Switching Systems Division - Rockwell International
- Lines: 64
-
-
- We are currently kicking around several configurations for an optimized
- build environment for a LARGE software project. I have proposed the
- following:
-
-
- ----------- ----------- -----------
- |4/690MP | FDDI | |-----------| SS10/30 |
- |4-way |----------| Alantec | -----------
- | |----------| Power |-----------| SS10/30 |
- |SCSI disk| | Hub | -----------
- | | | |-----------| SS10/30 |
- | | | | -----------
- | | | |-----------| SS10/30 |
- | | | | -----------
- | | | |-----------| SS10/30 |
- | | | | -----------
- | | | |-----------| SS10/30 |
- ----------- ----------- -----------
-
- The above configuration is based on the following rationale:
- - All equipment is available NOW.
- - We have a 4/490 for the 4/690 upgrade.
- - The 4/690 is upgradeable by adding cpu's, disks, additional FDDI
- interfaces and eventually, to an SC2000. An Auspex does not
- provide this upgrade path. (We were considering Auspex).
- - The 690 provides NFS service to the SS10 compile engines. The SS10's
- are configured with local disk for root, usr, and swap.
- - Each SS10 has a dedicated 10Mb/S 10BaseT line to the Alantec
- hub. The hub then has a dedicated FDDI channel to the 4/690.
- Future growth would be via a second hub and FDDI interface to additional
- SS10's.
- - The SS10/30's could be upgraded to SS10/54's or more SS10's could
- be added.
-
- Questions I have are:
-
- 1.) Has anyone ever tried anything like this? If so, what bottlenecks
- did you encounter?
-
- 2.) Does anyone see any inherit problems with the above configuration?
-
- 3.) How many SS10/30's can run full-blown compiles against NFS-mounted
- filesystems before the 4/690 is at its knees?
-
- 4.) I guess what (3.) is all about is this: If the SCSI disk on the 690
- is accessed through the relatively slow VME bus, and we spread the
- filesystem over 4 interfaces (via disksuite), and the FDDI interface
- is also on the VME bus, (whew!) and we build on 6 SS10's against
- these NFS-mounted filesystems, isn't the speed of the VME bus going
- to be the limiting factor? And then there's MBUS and SBUS...I need
- some help here, what's connected to what?
-
- Any and all serious comments or suggestions are welcome. Thanks for your time.
-
- -Bill
-
- ----------------------------------------------------------------------------
- William R. Quayle | UNIX Systems Administration
- Rockwell International | Switching Systems Division
- 1431 Opus Place MS-933-651 | Internet: quayle@switch.rockwell.com
- Downers Grove, IL 60515-1166 | VOICE (708) 960-8623
- | FAX (708) 960-9771
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