On Sun, 2011-05-08 at 09:30 +0300, Yedidyah Bar-David wrote: > On Sun, May 08, 2011 at 07:28:49AM +0300, Nadav Har'El wrote: > > On Sat, May 07, 2011, guy keren wrote about "Re: Disk I/O as a bottleneck?": > > > and if you have a lot of money to spend - you could consider buying an > > > enterprise-grade SSD (e.g. from fusion I/O or from OCZ - although for > > > your use-case, some of the cheaper SSDs will do) and use it instead of > > > the hard disks. they only cost thousands of dollars for a 600GB SSD ;) > > > > Instead of buying a huge SSD for "thousands of dollars" another option you > > might consider is to buy a relatively small SSD with just enough space to > > hold your "/" partition and swap space. Even 20 G may be enough. > > The rest of your disk - holding your source code, photos, songs, movies, > > or whatever you typically fill a terabyte with, will be a normal, cheap, > > hard disk. > > > > Several of my friends have gone with such a setup on their latest computer, > > and they are very pleased. > > I am considering, for my next laptop, and taking into account the fact > that most laptops do not have space for two disks but do have some kind > of flash memory slot ("card reader") - usually SD-something, to have the > OS on a (e.g.) SD card of 16 or 32 GB. I have no other experience with > such cards, so I do not know if they are considered durable enough, fast > enough - both random and sequential IO, both compared to SATA mechanical > disks and to SATA flash ones, etc. Comments are welcome :-)
SD cards are much much much slower then SSDs with regards to sequential I/O - and i think they live a shorter life. if you want to use one - you should make sure it's set in a mostly read-only setup. problematic directories include /var and /tmp. specifically, installing RPMs on such drives works much slower then on hard disks. they are still used on various appliances and embedded systems, in such a "mostly read-only" configuration. --guy _______________________________________________ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il