Like hell its fixed; They just got it more stable in certain use cases.  We 
still hit it for certain Sybase hosts on Sparc-III class CPUs (including the 
V445), but its not as bad as before.  We gave up and mandated it shutoff if a 
database gets installed (NMC is using a free Sybase variant btw, like 
AlphaStor).

Place this line in /etc/system and reboot:
set ip:do_tcp_fusion = 0x0

We've got a couple T5220 here; They're OK, but the way Sun maps CPUs to 
individual thread-cores is making it difficult to use here.  So far the biggest 
winner for us is the x4600, both in overall speed and I/O (2 Gig/sec sustained 
writes).  Most of our T-series servers are getting re-purposed as LDOM hosts, 
to consolidate multiple Dev boxes.


Your Sol-10 data is not inspiring confidence in my eventual upgrade to 7.4.x - 
Right now I'm doing the hardware and OS, running our old 7.1.3 server/SN under 
Sol-10 (the big thing here is an upgrade of Veritas Storage Foundation from 3.5 
to 5.0).  Then do AlphaStor to 3.1 (maybe - we're considering removing it after 
the DLT drives get ripped out), then Networker (probably in Jan).

Stan, your system is actually stable on 7.4.1 or is it just livable?  What do 
you actually run across right now, since when I was at Temple for the meet I 
was under the impression that you had things worked out.

--TSK




Joel Fisher wrote:
> Hey,
> 
> Here's the info you requested.
> 
> T5220(Sparc) solaris 10
> Solaris 10 8/07 s10s_u4wos_12b SPARC
> SunOS servername 5.10 Generic_127111-11 sun4v sparc
> SUNW,SPARC-Enterprise-T5220
> 
> So far I've been pretty unimpressed since the install.  Lots of
> problems.
> 
> Mind sharing how to shutoff tcp fusion?  I thought it was supposed to be
> fixed with the later releases, but maybe I'll try shutting it down.
> 
> Thanks!
> 
> Joel
> 


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