Werner, I'm glad I was able to help you find your storage problem. I remember when sonmeone showed me the "du" command about a year and a half ago how useful it was to me.
As far as LVM is concerned, there are others on this list who are more qualified to speak about LVM than I am. I'm sure this question has been answered in this list before. You might check the list archives at http://www.marist.edu/htbin/wlvindex?linux-vm and do a search (at the bottom of the page) on LVM. Be patient. The search can take a while. Having said that, I do seem to recall that someone posted the fact that even the boot disk can be on a logical volume. Probably any mount point can be on a logical volume. Here at Boeing, we use LVM volumes mostly for user data, /home for example, or for Oracle databases, so that we can use more than one physical volume for a mount point. We also keep the Oracle code in logical volumes so we can have more than one mount point on a minidisk. For our general purpose (non-Oracle, non-WebSphere) linux systems, we create the following minidisks: 292 mounted as / (boot disk) 293 V-disk for swap 294 mounted shared read-only as /usr 295 mounted as /home For boot purposes, Linux needs to have (at least) access to /boot, /bin, /sbin and /etc on the boot disk until it is up far enough to mount other filesystems. It may also need /var or /tmp. It definitely does not need /usr, /opt or /home unless you've done something really radical to change your system. One more thing. I wouldn't get too enamored of LVM just yet. I was in a meeting yesterday and one of the Unix gurus we work with on Linux/390 (and who is usually pretty knowlegeable about these things) mentioned that LVM is going to be sunsetted. It is rumored that Sistina will not be enhancing it beyond the 2.4 kernel, only providing basic maintenance. This same person said that Linus won't be putting LVM into 2.6 when it comes out. LVM will apparently be replaced by something similar but more capable from IBM, and that this new filesystem is already in the 2.4.17 kernel. There was an IBM rep there at the meeting and he seemed to know about this change as well. We've put all our expansion of LVM on hold until we find out if this rumor is true and (if so) what the replacement is and how you work with it. Perhaps others on the list can expand on this rumor and tell me if I'm just blowing smoke and spreading FUD. They say there are three signs of stress in your life. You eat too much junk food, you drive too fast and you veg out in front of the TV. Who are they kidding? That sounds like a perfect day to me! Gordon Wolfe, Ph.D. (425)865-5940 VM & Linux Servers and Storage, The Boeing Company > ---------- > From: Werner Kuehnel > Reply To: Linux on 390 Port > Sent: Wednesday, February 5, 2003 3:42 AM > To: [EMAIL PROTECTED] > Subject: Re: Root almost filled on 3390-3 > > Wolfe, > thanks for your reply. The du command was a great help in finding the culprit. > There were two files in /tmp from the installation of a DB2 fixpack which used > up a lot of space. Now we are at 40% and 870MB. > However, I'd still like to know which directories can be moved to LVM managed > space (only those which will not be accessed until LVM initialization). Is this > usual to have parts of root fs in LVM space? In my opinion /var, /usr and /tmp > would be good candidates, wouldn't they? > Sorry for the dumb questions, but I'm just starting with Linux. > > Werner > > "Wolfe, Gordon W" wrote: > > > > What's on your root? And what's on the other disks? Do a "df" and tell us the >results. > > > > I've been running SLES7 for a year with root on a 750-cylinder minidisk and /usr >on a dedicated 3390-3 shared read-only, /home on a 500-cylinder minidisk and swap on >a v-disk. I've never filled up root. (Okay, so there was that incident with the TSM >client logs...)> > > > > Check your logs to be sure they aren't filling up space in /var/log. > > > > cd /var/log > > du --max-depth=1 -h > > > > find out where your big usages are by CD'ing into various directories and trying >the du command above. I found that installing IBMJava2-1.4 used up about 350 megs! > > > > Do you have Oracle installed? Websphere? Those can be HUGE! > > > > They say there are three signs of stress in your life. You eat too much junk >food, you drive too fast and you veg out in front of the TV. Who are they kidding? >That sounds like a perfect day to me! > > Gordon Wolfe, Ph.D. (425)865-5940 > > VM & Linux Servers and Storage, The Boeing Company > > > > > ---------- > > > From: Werner Kuehnel > > > Reply To: Linux on 390 Port > > > Sent: Tuesday, February 4, 2003 3:49 AM > > > To: [EMAIL PROTECTED] > > > Subject: Root almost filled on 3390-3 > > > > > > I've installed SLES7 (Beta version) onto one (of three) 3390-3 dasd. The root > > > filesystem is now filled up to 92%. I'd like to have more freespace and wonder > > > how to do this. > > > Books say that root filesystem under LVM is not recommended. Are there at least > > > some directories I can move (of course on the fly) from root filesystem to LVM > > > space? > > > Are there any recommendations/experiences how to split up root fs to more than > > > one 3390-3 volume? > > > Any hints are very welcome. > > > > > > Werner > > > -- > > > > > > Werner Kuehnel > > > IMD GmbH (Mannheimer Versicherung) > > > Mannheim - Germany > > > > > > > > -- > > Werner Kuehnel > IMD GmbH (Mannheimer Versicherung) > Mannheim - Germany > >
