Vlad Manea <[EMAIL PROTECTED]> writes: > On the other hand I do not want to see all may cluster idle waiting > for the file server. The w/r rate transfer for these NAS is ~30-40 > MB/sec which probably is a modest one. > > Do you have any recommendations for the file server?
I would suggest, again, that the only way to find out what your application really needs is to benchmark. Some apps barely need to talk to the disk and a slow NFS server is fine (or even better because you can run diskless and save money which you can use for more processing nodes). Some apps hammer the file system and need a local drive, full stop. Some apps need only have reasonably slow networks, some need insanely low latency and high throughput. Some apps need fairly little memory, some need ast amounts. You won't know without testing. It is unreasonable to pick a specific configuration until you have tested. > I think I need lots of RAM and fast disks. Since SCSI are expensive, > are SATA disks OK? I would say that, for most purposes, modern SATA drives are pretty fast, but you may need to carefully tune things, regardless of the type of hard drive, in order to achieve maximum performance. Of course, for some applications, maximum drive performance is unnecessary, and for some it is crucial. The biggest piece of advice I can give you is *TEST BEFORE YOU DECIDE*. -- Perry E. Metzger [EMAIL PROTECTED] _______________________________________________ Beowulf mailing list, [email protected] To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
