On Thu, 20 Feb 2003 15:36:13 +0800 "fooler" <[EMAIL PROTECTED]> wrote:
> ----- Original Message ----- > From: "Jimmy Lim" <[EMAIL PROTECTED]> > To: <[EMAIL PROTECTED]> > Sent: Thursday, February 20, 2003 3:19 PM > Subject: Re: [plug] Re: XFS > > > > but beware of using > > UFS+softupdate, you must have a UPS to gracefully shutdown your > > FreeBSD machine. =) > > jim, you misunderstood how softupdates works :-> softupdates > guarantees filesystem consistency in the case of a crash :-> yes sir fooler, i forgot to mentioned that ufs+s guarantees fs consistency but what I mean is whenever a freebsd box encounters dismount of fs due to powerfailure or someone pushed the reset button, for example you're updating the system from buildworld and installworld, all the files you updated might get lost. According to freebsd handbook in tunefs: http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/configtuning-disk.html Soft Updates guarantees filesystem consistency in the case of a crash but could very easily be several seconds (even a minute!) behind updating the physical disk. If your system crashes you may lose more work than otherwise. Secondly, Soft Updates delays the freeing of filesystem blocks. If you have a filesystem (such as the root filesystem) which is almost full, performing a major update, such as make installworld, can cause the filesystem to run out of space and the update to fail. > > see freebsd handbook's section 6.10.2. > > fooler. -- Jimmy Lim Operation & Support Team Leader Tricom _ Philippine Linux Users Group. Web site and archives at http://plug.linux.org.ph To leave: send "unsubscribe" in the body to [EMAIL PROTECTED] Fully Searchable Archives With Friendly Web Interface at http://marc.free.net.ph To subscribe to the Linux Newbies' List: send "subscribe" in the body to [EMAIL PROTECTED]
