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

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

  • Next message: Igor Pokrovsky: "Re: Relative performance of swap-backed MFS vs. regular UFS?" 
    Date: Sat, 23 Oct 2004 22:06:38 +0400
To: hackers@freebsd.org

    On Fri, Oct 22, 2004 at 12:32:40PM -1000, Clifton Royston wrote:
    > I have seen some conflicting information posted about this in the
    > past, and I figure this is the best place to get an authoritative
    > answer.
    >
    > For a large temporary file system which must hold short-lived files,
    > mostly small but occasionally several very large ones (e.g. 100MB+), is
    > it better for performance and stability if this file system:
    >
    > 1) resides on a swap-backed MFS and trusts the OS to swap out
    > low-priority blocks if needed under RAM pressure, or
    >
    > 2) on a regular UFS and trusts the OS to buffer as many blocks as
    > possible into RAM when RAM is free?

    You can also use md(4). In my case I use it for /tmp.

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

    Relevant Pages

    • OT/drift: when is a RAMdisk an appropriate solution
      ... include the "ram disk" component in your project. ... Sometimes, a physical RAM ... only to wind up going directly to regular old ordinary memory, ... testing the file system software. ...
      (comp.lang.c)
    • Re: How to Add RAM File System
      ... RAM disk build as part of a Windows CE configuration. ... RAMDISK to use in my Windows Mobil application. ... File System into my catalog, ...
      (microsoft.public.windowsce.embedded)
    • Re: Prefetch Abort in FileSys
      ... looks at a few magic variables to decide if the RAM contents are valid. ... RAM is in a random state and will easily cause a file system ... NKForceCleanBootAPI in OEMInit to ensure that the filesystem is ... >> Errors like this are almost always problems in memory setup. ...
      (microsoft.public.windowsce.platbuilder)
    • Re: G5 ECC (was Re: X-serve verses G5s)
      ... concepts as "journaling" with no problem whatever, ... They never stop to consider that some, if not all, of the file system ... single bit ram failures. ... need to get a memory error on the in-memory copy of file system data ...
      (comp.sys.mac.system)
    • Re: Large Dictionaries
      ... Wed May 17 16:35:59 2006 StorageBerkeleyDB population stopped, ... Ok, according to the Windows task manager the Python process reads/writes to the file system during the run of BerkeleyDB test around 7 GByteof data and the hard drive is continuously busy, where the size of file I found in the Temp directory is always below 20 MByte. ... Can the BerkeleyDB via Python bsddb3 interface be tuned to use only RAM or as BerkeleyDB can scale to larger data amount it makes not much sense to tweak it into RAM? ...
      (comp.lang.python)