On Mon, 2003-03-03 at 20:23, David E. Fox wrote: > > I'll second that ... I've never gotten a Unix box of any flavor above 7% > > fragmentation and most of that was log files. But as soon as logrotate > > Well, given that log files can be fairly large, that more or less > makes sense, that there might be some fragmentation. But how would you > measure it on modern systems? For instance I seem to recall a util for > ext2fs that would tell you how fragmented a file or filesystem was and > even some versions of 'mount' would tell you the fragmentation > percentage of a given partition). > > Also because log files are loarge, isn't some of that fragmentation > already "engrained" into the file because of indirect blocks and so > forth? (Maybe true for ext2/ext3 - I don't know if even reiserfs or > other newer filesystems use those) but for what it's worth, any file > of large enough size is going to have extra blocks for pointers and > such.
True enough on reiserfs (don't know on the others.) But the numbers were from memory on ext2 > > > Civileme talking about some guy in Alaska who managed to hit some unreal > > number like 90% fragmentation... but I don't know much more than that.. > > That's pretty awesome :). But I agree that adding more RAM or having > a faster disk is a good thing to do. I would think that adding RAM is > going to make more of an impact over other upgrade paths. Up to a point yes. > > > There might be a way to further optimize a file system, but this is > > pretty much beyond the ken of what I know how to do. For me.... Get a > > Well, there might be ways to do background reshufflings of files in > the filesystem dynamically -- if based on usage (i.e., files accessed > more recently or more often are the ones that the OS or filesystem > pays more attention to). After all, if files aren't accessed all that > often, why bother optimizing them at all? I would have agreed hands down on the older slower discs, when the difference between the inside and outside of the disk was so great. But these days I don't think I'd notice the difference. James > > > > > ______________________________________________________________________ > > Want to buy your Pack or Services from MandrakeSoft? > Go to http://www.mandrakestore.com
Want to buy your Pack or Services from MandrakeSoft? Go to http://www.mandrakestore.com
