 |
|
|
1)
Message boards :
Cafe CPDN :
Off-Grid Solar/Renewable Energy Discussion
(Message 70795)
Posted 15 days ago by rob Post: It's stranded, I'm not counting those, why would that matter, I just twisted them up hard and measured the total. This single statement clearly demonstrates your total lack of understanding of cable construction. Twisting cables in the manner you describe does not totally remove the packing space between the cores so the actual CSA of the metal is always less than that which you've guessed at. You are lazy, arrogant and stupid - clearly demonstrated by your disabling the "not wearing your seat belt" alarm when driving - don't forget it's an offence which costs you money when caught. Boasting about such acts does eventually end you up in court. P.S. to horrify you even further I just snipped the wire on my new car coming out of the seatbelt socket. That foiled the health and softy system pretty easily. It thinks I have the belt on at all times. The bonging noise every 2 seconds for a few minutes is damn dangerous as it's very distracting while driving. |
|
2)
Message boards :
Cafe CPDN :
Off-Grid Solar/Renewable Energy Discussion
(Message 70793)
Posted 15 days ago by rob Post: Wiring up high loads with "cables laying around," where you don't know the wire gauge, haven't calculated loads, etc, is the sort of "casually sloppy with high power things" I'm criticizing you for I hope you also undertook the oh-so-bring task of counting the number of cores as well. (It's not too bad when there are only 7 cores, but did I get to 37 or 39 before Fred shoved a cuppa under ones nose?)
All compliant (stranded) with current standards cable, above about 1mm^2, is required to have the conductor cross section, and insulation class (which may include the type of insulation), printed on the cable at regular intervals. Thus the cable you are suing does not comply with current regulations, or is rather old, and may, or may not, be compliant. There's a lot of non-complaint cable coming in from the far east (India & China being the main sources).
...and then there are "Arctic grade" cables, which extend the range down to -20C (ore even lower!), which is quite useful if you want to use the cable outside when normal people want to stay inside hugging the heaters.... Some of us are short of money and make do. Al wire is a hell of a lot cheaper. Most of us could reasonably claim to be short of money, but most of us do use the "right stuff". It's cheaper for good reasons - not the least of which being that without the appropriate markings it is automatically non-compliant with current standards. |
|
3)
Message boards :
Cafe CPDN :
Off-Grid Solar/Renewable Energy Discussion
(Message 70779)
Posted 16 days ago by rob Post: Peter. Do some quick sums to check the rating of the cable needed for you 5kw resistive heaters. Even doubled "8A" cable is way under sized: 5000/240 = 20.83A (assuming you actually getting 240v in your location) - so you need to at least use three cables, single in air; but even that is marginal if the mains voltage droops to say 220v (which is still within spec of UK supply). Oxidation of conductors is more often associated with environmental conditions than temperature of conductor (unless the conductor is REALLY hot - over say 200C). The most common to fail first at elevated temperatures is the insulation. The mode of failure depends on the insulation material and the conductor metal will delaminate from the conductor, or go "brown and crispy", or go soft and floppy. Evil screw connectors - aluminium (miss-spelled by those led by the Americans for spelling as aluminum) conductors take very badly to being compressed by most screw terminals rapidly becoming work-hardened and so fracture. (Yet another good reason for not using aluminium conductors in domestic installations.) |
|
4)
Message boards :
Number crunching :
Batch 1008, and test batches 1009 to 1014 for Windows - issues
(Message 70721)
Posted 22 days ago by rob Post: In support of Glenn's comment about tasks running on AMD processors getting further along - the first 1008 batch task on my PC running windows 10 has passed the first trickle back, the rest of my collection are a few hours behind. More will be revealed in the next few hours, or, hopefully days...... |
|
5)
Message boards :
Number crunching :
WaH batches 996 & 1001 have been closed
(Message 70607)
Posted 5 Mar 2024 by rob Post: You might as well abandon them as any results they return will be discarded. This will save you a bit of electricity, and reduce the workload on the project servers a little bit. |
|
6)
Questions and Answers :
Windows :
Invalid or missing account key > Can't remove project
(Message 70557)
Posted 25 Feb 2024 by rob Post: Science United will not allow you to detach from a give project, so you first thing you have to do is remove Science United, then you have full control of the projects you run. |
|
7)
Message boards :
Number crunching :
Are the relevant people aware www.climateprediction.net is down?
(Message 70258)
Posted 1 Feb 2024 by rob Post: When I try to connect to www.climateprediction.net I get a site can't be found message. When I try to connect to climateprediction.net (without "www" at the start I get: Your PHP installation appears to be missing the MySQL extension which is required by WordPress. And with https:// or http:// at the start I randomly get the wordpress error or the site can't be found message. There's certainly something up with their site. |
|
8)
Message boards :
Number crunching :
New Work Announcements 2024
(Message 70191)
Posted 24 Jan 2024 by rob Post: Just landed (well about 4 hours ago) a wah2_nz25 task. Let's see how this one does..... |
|
9)
Message boards :
Number crunching :
EAS batches 1001-4
(Message 70166)
Posted 20 Jan 2024 by rob Post: OK, let's get back nearer the topic of this thread. The dreaded signal 11 problem bit me earlier today when I suffered a short lived power outage, and so lost several tasks that had been running quite happily for a few days. I really hope Glenn's efforts pay off soon. |
|
10)
Message boards :
Number crunching :
EAS batches 1001-4
(Message 70165)
Posted 20 Jan 2024 by rob Post: ...and thus missed out (to a greater or lesser degree) on the frustration of finding that a statement was going to be one character too long, and thus one would have to work out where to split it for the extension to work correctly or try and find out how to rearrange it so it would fit onto one line. |
|
11)
Message boards :
Number crunching :
EAS batches 1001-4
(Message 70163)
Posted 20 Jan 2024 by rob Post: Signal 11 is a grade one pain in the cushion polisher :-( As for FORTRAN - well let's just say "it's different". |
|
12)
Message boards :
Number crunching :
New Work Announcements 2024
(Message 70107)
Posted 15 Jan 2024 by rob Post: Just got 6 EAS25. Two of them died in just over 2 minutes, the other four have been running about 5 minutes and are behaving OK (so far). |
|
13)
Message boards :
Number crunching :
New work discussion - 2
(Message 70063)
Posted 21 Nov 2023 by rob Post: Oooo - just looked at my current two tasks must have survived two shut-downs as they each have over 12 hours of processing and it's only a few minutes since the last reboot. |
|
14)
Message boards :
Number crunching :
Completing a WU? Impossible. What am i doing wrong?
(Message 70005)
Posted 28 Oct 2023 by rob Post: Sadly this is a known problem with some (many?) of recent CPDN batches of work. It's all to do with the way the task saves and restores the file required to do a restart not working as intended..... |
|
15)
Message boards :
Number crunching :
Batch 996 Weather@Home2 East Asia25
(Message 69969)
Posted 20 Oct 2023 by rob Post: Do you have 'Leave non-GPU tasks in memory when suspended' enabled under 'General' (or 'Memory/Disk') in boincmgr? I rarely suspend BOINC, but until learning about this current batch not shutting down and the restarting properly I was shutting down BOINC in the minutes before shutting the computer off. I do however have "leave non-GPU tasks in memory when suspending" set ON. edit to add - My sole computer is running Windows 10, has 32GB memory and 8 "real" cores, plus another 8 with hyper threading turned on ( and virtualisation is turned on, but no virtual machine running just now. |
|
16)
Message boards :
Number crunching :
Batch 996 Weather@Home2 East Asia25
(Message 69965)
Posted 20 Oct 2023 by rob Post: It's restarting the model from a shutdown that risks the model failing like this. None my "two minute crashes" have been the result of re-start after a shutdown. |
|
17)
Message boards :
Number crunching :
Batch 996 Weather@Home2 East Asia25
(Message 69955)
Posted 19 Oct 2023 by rob Post: Hopefully if they do someone will have a look for the root cause of the issue that has led to the poor re-start performance of these tasks. |
|
18)
Message boards :
Number crunching :
Batch 996 Weather@Home2 East Asia25
(Message 69938)
Posted 18 Oct 2023 by rob Post: Should our computers "automagically" connect to Jasmin now, or will that take some time? The reason I ask is that mine is still looking at, what I believe to be the Korean serve "upload7.cpnd.org" on ip address 141.223.16.156, port 80. |
|
19)
Message boards :
Number crunching :
Batch 996 Weather@Home2 East Asia25
(Message 69925)
Posted 17 Oct 2023 by rob Post: I had one like that a short time ago, after digging through the log file it was fairly obvious that the BOINC client does get "somewhat confused" periodically and counts packets sent (but not acknowledged) as having arrived safely, and thus they are counted to the total transmitted. In my case a subsequent re-try reset the figure to zero, then to a more accurate value. |
|
20)
Message boards :
Number crunching :
Batch 996 Weather@Home2 East Asia25
(Message 69915)
Posted 17 Oct 2023 by rob Post: Thanks Glenn. Sadly either this change is going to take some time to actually cause an improvement in the situation or it wasn't the complete solution. I've still got three zip files failing at every retry: wah2_eas25_a0uz_199012_24_996_012224663_2_r735015961_1.zip - 79.36% after 14:26 transfer time wah2_eas25_a4ml_20142_24_996_012229545_2_r1812486379_8.zip - 47.67% after 15:20 transfer time wah2_eas25_a4ml_20142_24_996_012229545_2_r1812486379_3.zip - 1.40% after 35:02 transfer time Both tasks are still running. The first one, wah2_eas25_a0uz_199012_24_996, due to finish in about 4.5 days, and wah2_eas25_a4ml_20142_24_996 in just under 2 days. Both my other tasks are uploading their zips in a timely manner, but even these can take a couple of retries (or, should that be a couple of retries?). {edit to add} The situation has gone backwards - all new uploads are descending rapidly into the re-try cycle, so the situation is certainly no better than it was before. |
©2024 climateprediction.net