Thankfully, we'd /probably/ be using something a wee bit faster than a 64K
leased line. ;)
As far as I recall, DEC originally required that a network interconnect cluster
required 10MB/s connections. I think they also said that all the nodes had to
be on the same ethernet segment with no repeaters or bridges intervening! Maybe
that was just a way of being able to blame the networking equipment if there
were clustering problems when the customers invariably ignored the rules...
I suspect usable clustering would probably need a couple of MB/s of stable, low
latency networking between the cluster nodes in both directions. In most
realistic cases, something would be needed at each end to encapsulate the
cluster traffic for transport over IP.
Clustering over slow or unreliable links is not pretty or fun. The results are
generally poor performance, with hangs, timeouts and machines falling over,
with all cluster nodes affected, not just the ones on the wrong side of the
link. VMS does clusterwide locking on almost all shared resources. If a node
can't reliably make contact with other nodes in the cluster, things start to
fall apart very quickly. Unlike DECnet, clustering is not designed to gracefully
cope with network problems.
Regards,
Peter Coghlan.
On 2012-12-11 09:53, Jordi Guillaumes i Pons wrote:
El 11/12/2012, a les 3:42, Dave McGuire <mcguire at neurotica.com> va escriure:
Welcome!
-Dave
On 12/10/2012 09:41 PM, Steve Davidson wrote:
Jordi has joined HECnet via Multinet Tunnels to GORVAX::. Welcome
Jordi!
-Steve
Thanks a lot! :) I'm happy I will not lose the connectivity once my IP goes dynamic...
On the other hand, I'm thinking about writing a wrapper over Johnny's bridge program to support dynamic addresses. The program would build a bridge config file from its own list of hostnames and would launch the bridge using that config file. Then it would check the DNS translation periodically (each 5 minutes would be fine for a "hobbyist" network) and, in case it finds any change, it would make a new config, kill the bridge and start it up again with the new config.
FYI - for the bridge, if you have a DNS name in the config file, and the DNS entry is changed, just sending a SIGHUP to the bridge will force it to re-resolve the name. No need to stop and restart.
(A really stupid, simplistic solution in other words would be to just send a SIGHUP once an hour or so to the bridge. and it would be up most of the time, while still also handling if your IP address change.)
Johnny
--
Johnny Billquist || "I'm on a bus
|| on a psychedelic trip
email: bqt at softjar.se || Reading murder books
pdp is alive! || tryin' to stay hip" - B. Idol
/me being equally blind as a bat... :-) SIIRI been updated to a valid address now.
Johnny
On 2012-12-11 04:08, Steve Davidson wrote:
Maximum address would be 47.1023, so 47.1113 is invalid.
-Steve
-----Original Message-----
From: owner-hecnet at Update.UU.SE
[mailto:owner-hecnet at Update.UU.SE] On Behalf Of Johnny Billquist
Sent: Monday, December 10, 2012 22:01
To: hecnet at Update.UU.SE
Cc: sampsa at mac.com
Subject: Re: [HECnet] New node, SIIRI - 47.113
On 2012-12-09 16:30, sampsa at mac.com wrote:
Johnny,
When you get a chance can you register this for me?
sampsa
Uh. Hi, Sampsa. I already have SIIRI at 47.1113. Is that
wrong? Let me know if I should change it.
Johnny
--
Johnny Billquist || "I'm on a bus
|| on a psychedelic trip
email: bqt at softjar.se || Reading murder books
pdp is alive! || tryin' to stay hip" - B. Idol
--
Johnny Billquist || "I'm on a bus
|| on a psychedelic trip
email: bqt at softjar.se || Reading murder books
pdp is alive! || tryin' to stay hip" - B. Idol
On 2012-12-11 04:02, sampsa at mac.com wrote:
Yes, I was being an idiot, 1113 isn't a legal address, so let's set it to 47.113.
Doh! I didn't even think that far... :-)
Fixing now.
Johnny
Sampsa
On 11 Dec 2012, at 05:01, Johnny Billquist <bqt at softjar.se> wrote:
On 2012-12-09 16:30, sampsa at mac.com wrote:
Johnny,
When you get a chance can you register this for me?
sampsa
Uh. Hi, Sampsa. I already have SIIRI at 47.1113. Is that wrong? Let me know if I should change it.
Johnny
--
Johnny Billquist || "I'm on a bus
|| on a psychedelic trip
email: bqt at softjar.se || Reading murder books
pdp is alive! || tryin' to stay hip" - B. Idol
--
Johnny Billquist || "I'm on a bus
|| on a psychedelic trip
email: bqt at softjar.se || Reading murder books
pdp is alive! || tryin' to stay hip" - B. Idol
Maximum address would be 47.1023, so 47.1113 is invalid.
-Steve
-----Original Message-----
From: owner-hecnet at Update.UU.SE
[mailto:owner-hecnet at Update.UU.SE] On Behalf Of Johnny Billquist
Sent: Monday, December 10, 2012 22:01
To: hecnet at Update.UU.SE
Cc: sampsa at mac.com
Subject: Re: [HECnet] New node, SIIRI - 47.113
On 2012-12-09 16:30, sampsa at mac.com wrote:
Johnny,
When you get a chance can you register this for me?
sampsa
Uh. Hi, Sampsa. I already have SIIRI at 47.1113. Is that
wrong? Let me know if I should change it.
Johnny
--
Johnny Billquist || "I'm on a bus
|| on a psychedelic trip
email: bqt at softjar.se || Reading murder books
pdp is alive! || tryin' to stay hip" - B. Idol
On 2012-12-09 16:30, sampsa at mac.com wrote:
Johnny,
When you get a chance can you register this for me?
sampsa
Uh. Hi, Sampsa. I already have SIIRI at 47.1113. Is that wrong? Let me know if I should change it.
Johnny
--
Johnny Billquist || "I'm on a bus
|| on a psychedelic trip
email: bqt at softjar.se || Reading murder books
pdp is alive! || tryin' to stay hip" - B. Idol
Yeah, it was those articles that i spotted earlier. I'm being a bit of an idiot though, stumbling on how to recompile the damn kernel for bridge support.
On Mon, Dec 10, 2012 at 10:24 AM, Jordi Guillaumes i Pons <jg at jordi.guillaumes.name> wrote:
El 10/12/2012, a les 11:21, Tony Blews <tonyblews at gmail.com> va escriure:
The bridge is running on a different Pi, but what i'm trying to do is get it up and going on the same one as the image.
The problem is that they can't talk to each other. I know there is a workaround, but I can't work it out.
Oh, I understand.
I use vde to overcome that problem. Perhaps these posts will be of help:
http://ancientbits.blogspot.com.es/2012_09_01_archive.htmlhttp://ancientbits.blogspot.com.es/2012/06/simh-39-using-vde-for-fun-and.ht…
Right now I'm running 5 simh simulators, a KLH10 instance and the bridge at one Pi. :)
Jordi Guillaumes i Pons
jg at jordi.guillaumes.name
HECnet: BITXOV::JGUILLAUMES
El 10/12/2012, a les 11:21, Tony Blews <tonyblews at gmail.com> va escriure:
The bridge is running on a different Pi, but what i'm trying to do is get it up and going on the same one as the image.
The problem is that they can't talk to each other. I know there is a workaround, but I can't work it out.
Oh, I understand.
I use vde to overcome that problem. Perhaps these posts will be of help:
http://ancientbits.blogspot.com.es/2012_09_01_archive.htmlhttp://ancientbits.blogspot.com.es/2012/06/simh-39-using-vde-for-fun-and.ht…
Right now I'm running 5 simh simulators, a KLH10 instance and the bridge at one Pi. :)
Jordi Guillaumes i Pons
jg at jordi.guillaumes.name
HECnet: BITXOV::JGUILLAUMES
The bridge is running on a different Pi, but what i'm trying to do is get it up and going on the same one as the image.
The problem is that they can't talk to each other. I know there is a workaround, but I can't work it out.
On Mon, Dec 10, 2012 at 10:17 AM, Jordi Guillaumes i Pons <jg at jordi.guillaumes.name> wrote:
El 10/12/2012, a les 10:26, Tony Blews <tonyblews at gmail.com> va escriure:
What I'd like to do is run the bridge program on the same raspberry that the SIMH image runs on, but I have no idea how to do this. I seem to recall a post about doing it recently, but I can't recall how to view the list archives.
Running the bridge in the Pi is a non-issue. You just have to recompile it and you are set.
As for running DECnet, there is no decnet support in the raspbian kernel. I have tried to build myself a kernel with decnet support (cross-compiling it from another machine) and my first try was a complete failure (the new kernel crashes during boot). I will give it another try...
On the other hand, since I am running KLH10 in the same machine the main interface is hijacked by a virtual TOPS-20 machine, so I won't be able to run native linux decnet anyway... :)
Jordi Guillaumes i Pons
jg at jordi.guillaumes.name
HECnet: BITXOV::JGUILLAUMES
