On Wed, Dec 17, 2014 at 11:41 AM, Matthew Dillon <[email protected]> wrote:
> Swapcache will speed up accesses to the external disk very nicely, but not > have much of an effect on write performance. But writes are already > buffered to some degree, and NFS clients usually flush modifies files on > close() for safety reasons (which might be why you see some latency). That > can often be turned off on the client but I do not recommend doing so. > > The main problem with USB-attached drives is that the I/Os are basically > serialized, so random access performance is going to be horrible. For a > server you really need a SATA attached drive. Swapcache will improve > random access performance though once things get cached. > > Speaking of which, does anyone have a recommendation for an eSATA card or chipset to look for that works well with DragonFly? I've been using USB drives for backups, but want to switch to something a little faster and more reliable. My computers don't have any extra internal SATA ports free so I need an expansion card. Thanks, Eric -- "Suburbia is where the developer bulldozes out the trees, then names the streets after them." -- Bill Vaughn
