On 01/04/2012 06:13 AM, Viesturs Lācis wrote: > 2012/1/4 Mark Wendt<mark.we...@nrl.navy.mil>: > >> If you plan on running pure SSD's on Ubuntu, this fella put up a very >> good write up on extending the life of the SSD (limiting writes), and >> getting as much performance from them as you can: >> >> <http://ubuntuforums.org/showpost.php?p=11101591&postcount=5> >> > I have been following these suggestions with CF and SSD since my first > setup with CF card: > disable access time > move /tmp to RAM > change i/o scheduler to noop > move firefox cache to /tmp > > Thanks for this particular link, because this is first time I see > something about disabling journaling in ext4, I will definitely try it > out. > And this author suggests using "deadline" as i/o scheduler, in my > previous readings I found that "noop" is suggested. Does anybody have > an idea, what is the difference between them? > > Viesturs > First I'd heard of either one of them. I haven't played around much with SSD's as of yet, but they are starting to get more and more popular here at work, as is Ubuntu as the primary OS. According to the author of that clip, setting noop inthe primary scheduler is better than cfq but you still have some latency in the system when disk writes happen. He doesn't go into any detail on deadline, but I infer from the way he wrote you don't have that same problem when you set the scheduler option to deadline.
Here's a good discussion on the differences between the schedulers: <http://www.redhat.com/magazine/008jun05/features/schedulers/> It's Redhat, but it still applies. Mark ------------------------------------------------------------------------------ Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
