tag:blogger.com,1999:blog-1675184707067447729.post7222951389127802188..comments2023-07-12T07:12:04.697-07:00Comments on The RAS Solution: Optimizing Your Computer for Fast HEC-RAS ModelingChris G.http://www.blogger.com/profile/00354834185663924786noreply@blogger.comBlogger16125tag:blogger.com,1999:blog-1675184707067447729.post-53698288498129646372019-04-08T21:38:12.621-07:002019-04-08T21:38:12.621-07:00I've never tried 2 million cells before.I've never tried 2 million cells before.Chris G.https://www.blogger.com/profile/03272464763887890080noreply@blogger.comtag:blogger.com,1999:blog-1675184707067447729.post-26708079527587529682019-04-07T07:58:12.644-07:002019-04-07T07:58:12.644-07:00I would like to know which is the maximal number o...I would like to know which is the maximal number of cells in the model you succeeded to run?<br /><br />In my case I ran a „rain on grid“-model with 2,2 mil. cells on a machine with 8 gb rams but more is not possible even another workstation with 64 gb rams.Osterwaldhttps://www.blogger.com/profile/11921952476925879858noreply@blogger.comtag:blogger.com,1999:blog-1675184707067447729.post-26458716931702029132019-02-21T09:07:17.010-08:002019-02-21T09:07:17.010-08:00Your blog is amazing! I always start at Google but...Your blog is amazing! I always start at Google but somehow always end up here. Thank you for this information!Anonymoushttps://www.blogger.com/profile/00497734597020363487noreply@blogger.comtag:blogger.com,1999:blog-1675184707067447729.post-29507731764128243412019-01-08T01:14:45.107-08:002019-01-08T01:14:45.107-08:00As HEC-RAS is not open-source, it is likely that t...As HEC-RAS is not open-source, it is likely that there is just no way to parallelize it over several computers (same as for GPU, that's in HEC's hand to implement that for us if they want). However, one thing you could do is to launch several computations at the same time on several computers. This is useful when you run sensitivity analyses for instance, or if you just have to run various scenarios for a project. You'd gain a lot of time and use the power of your colleague's computers while they're not being used, overnight for instance.<br />I implemented something like that a while ago, using a calculating environment called Promethee developed by the IRSN (check it online). Unfortunatly it's not publicly available, but you can dig into Promethee's documentation to get the logic of it. It is basically a task scheduler working over a network you have to configure (it could just be a standalone computer), couple it with HEC-RAS so that it knows how to run it (that's when Chris' book about RAS' API comes in handy!), and that's pretty much it. There may be other softwares like Promethee available.MaxLnoreply@blogger.comtag:blogger.com,1999:blog-1675184707067447729.post-65939473856921799782018-09-03T01:43:24.980-07:002018-09-03T01:43:24.980-07:00Hi, is there a way running HEC RAS models on sever...Hi, is there a way running HEC RAS models on several computers simultaneously? I am thinking about parallel computing. I never did this before, but I heard it is a way increasing the speed of the simulations. At my office we have 3 computers that we could use for this purpose. I ran through your paper entitled "Controlling HEC-RAS using MATLAB" where you describe at the end how to implement the parallelisation on Matlbab. Unfortunately, we do not use Matlab at my office, so I was wondering if there is an alternative (ideally based on open source programs). Many thanks.Anonymoushttps://www.blogger.com/profile/07370591522071258370noreply@blogger.comtag:blogger.com,1999:blog-1675184707067447729.post-90508799024574861272018-08-22T13:13:47.444-07:002018-08-22T13:13:47.444-07:00I have an issue trying to run HECRAS on Servers, i...I have an issue trying to run HECRAS on Servers, it is drastically slower running on server than Desktop, just wondering why is that and how to over come itAnonymoushttps://www.blogger.com/profile/00014035218108783195noreply@blogger.comtag:blogger.com,1999:blog-1675184707067447729.post-23226884457239670562018-08-10T00:52:18.119-07:002018-08-10T00:52:18.119-07:00Running 900,000 cells on a core i9 7900x @4,8Ghz 1...Running 900,000 cells on a core i9 7900x @4,8Ghz 128GB ram and a Samsung 960 pro SSD, completed in 18 hoursAnonymoushttps://www.blogger.com/profile/04676437548650284245noreply@blogger.comtag:blogger.com,1999:blog-1675184707067447729.post-53039007770093638612017-12-02T18:31:14.720-08:002017-12-02T18:31:14.720-08:00Hi, I just tested a 2D HEC-RAS model in a 32 "...Hi, I just tested a 2D HEC-RAS model in a 32 "real cores" (64 hyperthreated) computer. However, although the software allows me to run it in 32 cores the task manager shows a cpu usage of 25%. Is there a limitation on the maximum number of cores that RAS can use? It looks that the maximum is 8 "real cores".Anonymoushttps://www.blogger.com/profile/01791371293702331640noreply@blogger.comtag:blogger.com,1999:blog-1675184707067447729.post-57869647372333596092017-11-16T22:42:46.664-08:002017-11-16T22:42:46.664-08:00thanks for giving this great ideathanks for giving this great ideafarhanahttps://spreadingknowledge32.weebly.com/noreply@blogger.comtag:blogger.com,1999:blog-1675184707067447729.post-6982634726206316722017-10-22T20:22:56.491-07:002017-10-22T20:22:56.491-07:00G'day Stephane. I am looking to purchase a la...G'day Stephane. I am looking to purchase a laptop to run 2d hec-ras models on, and am just curious how your alienware is running them these days. Do you think the newest model would be suitable, considering the hyper-threading limitation? Cheers. Ryannoreply@blogger.comtag:blogger.com,1999:blog-1675184707067447729.post-71599999740547595892016-09-06T16:51:56.216-07:002016-09-06T16:51:56.216-07:00we tried 400,000 cells and it took 12 hours run wi...we tried 400,000 cells and it took 12 hours run with this specs: 1 processor<br />12 cores per processor<br />Intel Xeon E5-2600 v3<br />32 TB internal storage<br />1.5TB max memory<br />3.5 GHz processor frequency<br /><br />(4) LFF SAS/SATA/ SSD (8 + 2) <br />SFF SAS/ SATA/SSD Hot plugAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-1675184707067447729.post-64701548806912568922016-08-24T18:25:03.577-07:002016-08-24T18:25:03.577-07:00Thanks for including Gary Brunner's explanatio...Thanks for including Gary Brunner's explanation of how hecras uses (or doesn't use) intel's hyperthreading.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-1675184707067447729.post-14214169807224394462016-08-07T18:39:59.914-07:002016-08-07T18:39:59.914-07:00This was an excellent post..Around here I run a ma...This was an excellent post..Around here I run a machine with 16gb ram;i7 w/2.4Ghz; HD 1Tb 7200x;nvidia840m(4gb) ;on windows 8.1 and 10 (64bits).<br />I´m running models with until 1.8 million cells. Calculations runs ok. But very often errors/crash´s happens when running D*V and Arrival time maps...Anonymoushttps://www.blogger.com/profile/07644927419208148482noreply@blogger.comtag:blogger.com,1999:blog-1675184707067447729.post-49836943481221393792016-08-06T00:26:47.422-07:002016-08-06T00:26:47.422-07:00Stephane have a new big and fast laptop after cour...Stephane have a new big and fast laptop after course in Milan!!!Anonymoushttps://www.blogger.com/profile/00195168180749133860noreply@blogger.comtag:blogger.com,1999:blog-1675184707067447729.post-22800225578527650592016-08-05T14:00:07.205-07:002016-08-05T14:00:07.205-07:00Nice!!! Was that the same gigantic laptop you bro...Nice!!! Was that the same gigantic laptop you brought to Milan?Chris G.https://www.blogger.com/profile/03272464763887890080noreply@blogger.comtag:blogger.com,1999:blog-1675184707067447729.post-56758914158700032202016-08-05T13:30:17.139-07:002016-08-05T13:30:17.139-07:00Alienware Laptop 17R3 with a 6820HK processor, 2 S...Alienware Laptop 17R3 with a 6820HK processor, 2 SSD x 1 Go, GPU Nvidia 980M, RAM 16 GO and an UHD screen for my precious HECRAS ... That's is the perfect vector for modeling big big modèles (and I love it) !!!Stephane Gaijihttps://www.blogger.com/profile/17912058397492148707noreply@blogger.com