tag:blogger.com,1999:blog-6996317921980758688.post2482152489943630834..comments2022-07-15T06:34:26.145+01:00Comments on NGS: When acronyms collide...David Meredithhttp://www.blogger.com/profile/14618673864658094727noreply@blogger.comBlogger3125tag:blogger.com,1999:blog-6996317921980758688.post-2096841921632444972011-06-13T23:25:25.668+01:002011-06-13T23:25:25.668+01:00There's quite possibly a bit of my PP backgrou...There's quite possibly a bit of my PP background (or bias, as some people might prefer :-) ) coming through here, but if I were looking for a basic minimal CE to put between a WMS and a batch system, then your original plan of CREAM would be it - a CREAM is very lightweight; my understanding of ARC is that it does clever things with storage and is rather less so. Plus I think there's a lot to be said for doing what everyone else is doing, even if it's possibly not the absolutely best technical solution.<br /><br />What slightly worries me is that you might be having a stronger negative reaction to gLite's PP heritage than is warranted - if what you really want is EGI CREAM/SGE then gLite CREAM/SGE virtually is that, and is certainly a lot closer than EGI ARC/SGE is. There often seems to be a perception that gLite is just good for PP work, and it's not really true.Ewanhttps://www.blogger.com/profile/17124871481877068938noreply@blogger.comtag:blogger.com,1999:blog-6996317921980758688.post-1810290985251607332011-06-13T10:48:19.220+01:002011-06-13T10:48:19.220+01:00Ewan,
Thank you. I would agree that ARC is not an...Ewan,<br /><br />Thank you. I would agree that ARC is not an ideal solution. If EMI had delivered CREAM + SGE, it would never have been needed.<br /><br />We are trying ARC because we are working with two non-Particle-Physics communities with similar needs:<br /><br />* Jobs will always be submitted via a WMS. The WMS can be configured to submit jobs to ARC.<br /><br />* CPU will be provided by traditional HPC clusters running PBS, SGE and SLURM. We are likely to have a single grid front end machine for each cluster.<br /><br />If I end up - to use your skiing analogy - as the Eddie-the-eagle of the grid. We can revert to gLite or wait for the EMI to provide the missing SGE support.Jason Landerhttps://www.blogger.com/profile/09537800355395908896noreply@blogger.comtag:blogger.com,1999:blog-6996317921980758688.post-12687634739074786712011-06-13T10:15:09.788+01:002011-06-13T10:15:09.788+01:00It is our only real option: ARC is the only one of...<i>It is our only real option: ARC is the only one of the EMI's current middleware menagerie with SGE support.</i><br /><br />EMI is clearly the way of the future. It is rather less clearly the way of now, and by deploying ARC you're going to be in a club of two (in the UK) and the other one isn't running SGE. This is not so much going off piste as skiing out through the gate, surfing down the river and fetching up on a nice beach somewhere.<br /><br />You could go rather more mainstream and install the currently production ready glite release of CREAM/SGE, which various UK sites are already running, then move across to the EMI release when it's ready, just as everyone else will be doing. It'll be a bit of admin effort (though with the amount of support available for the asking, probably less than ARC would be) and the move to EMI shouldn't upset the interfaces between the CE and the rest of the world at all.Ewanhttps://www.blogger.com/profile/17124871481877068938noreply@blogger.com