Re: Relative performance of swap-backed MFS vs. regular UFS?

From: Igor Pokrovsky (ip_at_doom.homeunix.org)
Date: 10/23/04

  • Next message: Giorgos Keramidas: "pstat/swapinfo -h flag"
    Date: Sat, 23 Oct 2004 22:24:20 +0400
    To: hackers@freebsd.org
    
    

    On Sat, Oct 23, 2004 at 01:12:46PM -0500, Ryan Sommers wrote:
    > >
    > >You can also use md(4). In my case I use it for /tmp.
    > >
    > MFS is the same thing as md(4). mfs = Memory File System, md = Memory
    > Disk. Difference is only in the name.

    I thought mfs is allocated from virtual memory, while md - directly from RAM.
    Am I wrong?

    -ip

    -- 
    The best shots happen immediately after the last
    frame is exposed.
    _______________________________________________
    freebsd-hackers@freebsd.org mailing list
    http://lists.freebsd.org/mailman/listinfo/freebsd-hackers
    To unsubscribe, send any mail to "freebsd-hackers-unsubscribe@freebsd.org"
    

  • Next message: Giorgos Keramidas: "pstat/swapinfo -h flag"

    Relevant Pages

    • Re: file access via read/write vs mmap() interface
      ... Memory] can't support any file access with mmap() whose size is more ... using any virtual memory and you are not using any RAM, ... pool is allocated and the disk page loaded into the RAM. ...
      (comp.unix.programmer)
    • Re: Madly OT: Laptop Ram question
      ... Specs are: PIII 1200, 384mb RAM, ... Disk fragmentation -- when did you last defrag the disk? ... Virtual memory -- how much have you got, is it fixed or do you let XP ... and knoppix is based on debian -- you should be able to boot ...
      (uk.rec.motorcycles)
    • Re: Garbage collection, threads and GUIs.
      ... > backing virtual RAM on disk. ... There are three kinds of resources we might be concerned with here: RAM, ... Address space refers to the number of virtual memory locations available ... because the operating system ...
      (comp.lang.java.help)
    • Re: Too many processes?
      ... limitation like insufficient disk space, ... But, since disk is much slower than RAM, using virtual memory will result in ... When the size of the image equals about half of the RAM (really about 100 ... I have installed as much of the fastest RAM that my motherboard can handle. ...
      (microsoft.public.windowsxp.general)
    • Re: SortMerge avoids thrashing (was: Baileys "two pass" FFT algorithm question)
      ... OK, the first question is whether you did it entire in actual RAM, ... using disk, or what? ... how much virtual memory you are allowed, and how many disk or tape ... drives you have available for merge runs. ...
      (comp.programming)