Steve> I'm configuring a PowerEdge R520 that I'll be installing RHEL Steve> 6.4 on next month. (Actually, Scientific Linux 6.4) I'll be Steve> upgrading to RHEL (SL) 7 when it's available, which is looking Steve> like it might default to XFS. Steve> This will be a 6 drive RAID10 set up for ~100 Gnome (freenx) Steve> desktop users and a virtual Windows 2008 Server guest running Steve> MS-SQL, so there is plenty of opportunity for i/o Steve> parallelism. This seems a good fit for XFS. So are you keeping home directories on here as well? And how busy will the MS-SQL server be? That's probably where most of your IO will come from I suspect. Also, make sure you get lots of memory. The more your freenx server can cache in memory, the better things will be. I also note that under Centos 6.4 firefox 22 has a tendency to grow without bound, sucking up all the memory and causing the system to bog down. I admit I'm reading email via OWA, using Service Now, and lots of tabs, but basically memory usage sucks. And I'm using freenx as well to access my desktop. I do admit I'm using a 3rd party repo, so I'm running: firefox-22.0-1.el6.remi.x86_64 Steve> My preference would be to use Linux MD RAID10. But the Dell Steve> configurator seems strongly inclined to force me towards Steve> hardware RAID. Skip the configurator and just buy a controller 3rd hand. Steve> My choices would be to get a PERC H310 controller that I don't need, Steve> plus a SAS controller that the drives would actually connect to, and use Steve> Linux md. Or I can go with a PERC H710p w/1GB NV cache running hardware Steve> RAID10. (Dell says their RAID cards have to function as RAID Steve> controllers, and cannot act as simple SAS controllers.) Steve> I also have a choice between 600GB 15k drives and 600GB 10k "HYB CARR" Steve> drives, which I take to be 2.5" hybrid SSD/Rotational drives in a 3.5" Steve> mounting adapter. Is your key metric latency, or throughput? John -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
