| Title: | Ask the Storage Architecture Group |
| Notice: | Check out our web page at http://www-starch.shr.dec.com |
| Moderator: | SSAG::TERZA N |
| Created: | Wed Oct 15 1986 |
| Last Modified: | Fri Jun 06 1997 |
| Last Successful Update: | Fri Jun 06 1997 |
| Number of topics: | 6756 |
| Total number of notes: | 25276 |
Hi all,
What is the number of CIPCA required for a 2-node CI cluster? The
system configuration includes 2x Alphaserver 4100, 3x HSJ50 and a
SC008-AC. The alpha configuration tool always recommend 4 CIpCA. I
believe 2 CIPCA adapters should be enough for 2-node cluster.
| T.R | Title | User | Personal Name | Date | Lines |
|---|---|---|---|---|---|
| 6465.1 | CI is ten years old... | XDELTA::HOFFMAN | Steve, OpenVMS Engineering | Tue Mar 11 1997 11:57 | 8 |
For a new VMScluster, I'd take a serious look at memory channel (MC), I'd definitely configure Ethernet or (better) FDDI, and I'd definitely look to configure a dual-host SCSI (possibly with the HSZ40/RZ29 or HSZ40/RZ40 storage) in preference to a CI/HSJ solution. But to answer your question, yes, the minimum number of CI controllers required for a two-node VMScluster is two. | |||||
| 6465.2 | old isn't necessarily bad... | TROOA::MSCHNEIDER | [email protected] | Tue Mar 11 1997 22:36 | 15 |
RE: .-1
Interesting you recommend going SCSI over CI .... yes the technology is
over 10 years old, but when I asked some of the Storage Engineers which
technology they would recommend for bet your business solutions (which
clusters usually are), they recommended CI over SCSI. The HSJ50
performance is much improved and basically on par with the HSZ50. Then
you get all the distance advantages of CI over SCSI, plus redundant
paths in the cable.
Yes it costs way more than a SCSI solution, but proven reliability is
worth something.
Of course once Fiberchannel/UltraSCSI stuff arrives then we really will
see a significant performance difference over CI.
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| 6465.3 | Thanks. | HGOVC::PATRICKNG | Wed Mar 12 1997 07:00 | 4 | |
Thanks for your reply.
Patrick
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| 6465.4 | AMCFAC::RABAHY | dtn 471-5160, outside 1-810-347-5160 | Wed Mar 12 1997 07:17 | 1 | |
CI is hot pluggable ... | |||||