Messages in this thread | | | Date | Fri, 10 Apr 2009 01:57:25 -0400 | From | Theodore Tso <> | Subject | Re: SSD and IO schedulers |
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On Thu, Apr 09, 2009 at 07:56:32PM -0400, Bill Davidsen wrote: > This is good information, and if I ever configure a netbook for run > fsync-tester I shall avoid the DL scheduler. ;-( > > However... this test, and several others designed to find the ultimate > performance limits of disk io, don't mimic any typical use of most > desktops and virtually all netbooks. > > Is there a benchmark which would return so useful data for typical use, > doing some mail, some browsing, and maybe some light presentation, > spreadsheet, or word processing. None of those uses are likely to > generate this level of io, this file size, etc. The number of users is > one, it's not used as a server, and probably most of the tuning done (if > any) is aimed at battery life rather than blinding speed with a three > digit load average.
As long as you don't believe a netbook user will ever try to type an e-mail using a mail reader like alpine (which is what Linus uses), while running "yum update" in the background, sure. But if you don't think that is a normal use case, I'll let you argue with Linus on that score. In any case, the big-file-write-and-flush plus fsync-tester was designed to roughly replicate this scenario which Linus saw on his desktop system.
- Ted
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