On Wed, 21 May 2008 16:13:16 +0300, Erez D <[EMAIL PROTECTED]> wrote: > > On Wed, May 21, 2008 at 4:06 PM, Ehud Karni <[EMAIL PROTECTED]> wrote: > > > On Wed, 21 May 2008 15:15:51 +0300, Erez D <[EMAIL PROTECTED]> wrote: > > > > > > > > If you have enough disk space you can create "pseudo" snapshots by > > > > using hardlinks between the snapshots so only changed file takes space. > > > > It really depends on the file size distribution - few large files that > > > > change constantly will defeat this concept, while many small files is > > > > ideal for this scenario. > > > > > > using hard links as snapshot is works only if you ensure people do not > > open > > > new files with append mode. > > > if they do, they will modify your file as well as it's snapshot ... > > > > This is not the case with my suggestion. The hard link is between > > "snapshots", there is no hard link to the original files. > > > you mean you utilize something like rsnapshot ? > > this is a great solution. however it is not a real snapshot solution like > LVM (version whatever) > this is neither 'create snapshot in zero time' nor 'in zero space', contrary > to LVM. > > total disk space is at least twice the size of your data > in LVM is only once + size of changes.
It is exactly like rsnapshot (pointed out by Didi). Ehud. -- Ehud Karni Tel: +972-3-7966-561 /"\ Mivtach - Simon Fax: +972-3-7966-667 \ / ASCII Ribbon Campaign Insurance agencies (USA) voice mail and X Against HTML Mail http://www.mvs.co.il FAX: 1-815-5509341 / \ GnuPG: 98EA398D <http://www.keyserver.net/> Better Safe Than Sorry ================================================================= To unsubscribe, send mail to [EMAIL PROTECTED] with the word "unsubscribe" in the message body, e.g., run the command echo unsubscribe | mail [EMAIL PROTECTED]
