\nthe underlying filesystem<\/a> with the “lvextend” command for the
\nfirst time. The “-r” option allowed the logical volume &
\nfilesystem to be extended with just one command. I saw the “-r” switch there on the man page and decided to try it!<\/p>\n
\n<\/p>\n
\tTo top it off the partition I extended
\nwas my root “\/” partition. The man page says that the “-r”
\noption calls the “fsadm” command to extend or resize the
\nfilesystem.<\/p>\n
\n<\/p>\n
\tWhat caused me to use this option was
\nthat I just did a fresh install of one of my Fedora Linux systems
\nthat has served alternately as a game server, web server, backup
\nserver. Currently in this iteration it will take over as my new game
\nserver. I have all of my files in two logical volumes on a separate
\nphysical drive from my OS drive so that I will not have to worry
\nabout data files I don’t wish overwritten during OS installs or I can
\njust take that drive to the next server I build and manually mount it
\non that new server.<\/p>\n
\n<\/p>\n
\tThe drive of course is using LVM and
\nis its own volume group so that information is on the drive is
\nimported easily into LVM. I have two logical volumes on this physical
\ndrive within the volume group..<\/p>\n
\n<\/p>\n
\tOne logical volume I mount to \/home
\nand the other to \/usr\/local\/games. These logical volumes have files I
\nhave downloaded to various home directories and working files &
\nbinaries for the games I host on my servers.<\/p>\n
\n<\/p>\n
\tI didn’t include this extra physical
\ndrive that I store my data on as a target during the fresh Fedora 14
\ninstall, so I needed to unmount the \/home that was created with the
\ninstall and then mount my logical volume that holds data for my home
\ndirectories I mount on “\/home\/” and game data which I mount on
\n“\/usr\/local\/games\/”.<\/p>\n
\n<\/p>\n
\tThe reason I ended up extending my “\/”
\npartition was that I didn’t pay attention to how much space the
\ninstallation of Fedora 14 was giving “\/home” or “\/”. I
\ndidn’t even intend for the install to make the “\/home” a separate
\npartition but oh well it did and I needed the space the install
\nallocated for “\/home” to move to “\/”.<\/p>\n
\n<\/p>\n
\tI won’t speak about partition sizing
\nand the reasoning’s for that since I started getting really liberal
\nwith that with the partitions I used to be strict on since drives are
\nso large now.<\/p>\n
\n<\/p>\n
\tAnyway not a big deal to those of you
\nwho may have used this “-r” feature before but I never have, even
\nwith HP-UX. I truthfully don’t know if HP-UX has the “-r” switch
\nfor the lvextend command something I’ll research and find out later
\nsince the person who was bringing by my HP-UX box hasn’t brought it
\nby yet.<\/p>\n
\n<\/p>\n
\tNormally you would do the “lvextend”
\nand then use the “resize2” command which doesn’t take long but
\nits always nice to use the least amount of commands.<\/p>\n
\n<\/p>\n
\tAnyway this is what I did:<\/p>\n
\n
- \n
- \n
Logged in as root in “gdm”
\n(Gnome Xwindows) after commenting out the “root” user lines in
\n\/etc\/pamd.d\/gdm & etc\/pamd.d\/gdm-password. I know, not what you
\nare supposed to do but I didn’t feel like rebooting and wanted
\nmultiple windows up.<\/p>\n<\/li>\n - \n
Killed the processes that were
\nstill running on \/home<\/p>\n- \n
- \n
fuser -ku \/home (didn’t work)<\/p>\n<\/li>\n
- \n
lsof \/home (showed pid)<\/p>\n<\/li>\n
- \n
kill -9 “pid”<\/p>\n<\/li>\n<\/ol>\n<\/li>\n
- \n
unmout \/home<\/p>\n<\/li>\n
- \n
vgdisplay -v|more (showed my vg
\nthat was on my physical drive)<\/p>\n<\/li>\n - \n
vi \/etc\/ fstab<\/p>\n
- \n
- \n
\/dev\/mapper\/home_vg-lvol1 \/home
\next4 defaults 1 2\n<\/p>\n<\/li>\n - \n
\/dev\/mapper\/home_vg-lvol2
\n\/usr\/local\/games ext4 defaults 1 2\n<\/p>\n<\/li>\n<\/ol>\n<\/li>\n - \n
mount -a<\/p>\n<\/li>\n
- \n
df -kh<\/p>\n<\/li>\n
- \n
lvchange -a n
\n\/dev\/vg_system-name\/lv_home<\/p>\n<\/li>\n - \n
lvdisplay
\n\/dev\/vg_system-name\/lv_home<\/p>\n<\/li>\n - \n
lvremove
\n\/dev\/vg_system-name\/lv_home<\/p>\n<\/li>\n - \n
llvextend -l <PE -total size>
\n\/dev\/vg_system-name\/lv_root -r<\/p>\n- \n
- \n
Since its “\/” it will not
\nunmout but perform an online filesystem extension even if you
\nanswer “no’.<\/p>\n<\/li>\n<\/ol>\n<\/li>\n<\/ol>\n\n<\/p>\n
\tThat was it in a nutshell, took much
\nlonger to write this post! This is just my story of a new switch I
\nfound and decided to play with if you decide to try this please if
\nyour system or data is valuable back it up and do your research for
\nyour environment! Make sure you have the online LVM packages etc. if
\nyou want to do an online filesystem extension. As they say mileage
\nwill vary!<\/p>\n\n<\/p>\n
\tLVM is different for HP-UX than with
\nLinux and a bit different on other UNIX systems as well so I couldn’t
\nfind the command to see if the physical extents were concurrent but I
\nsuspect they are not. Just an FYI. You know please post, I ran out of
\ntime tonight and didn’t look much further.<\/p>\n\n<\/p>\n
\tThis isn’t meant to be a tutorial but
\nif you have any question please ask! Maybe I’ll clean this up at a
\nlater time and present it in more of a tutorial fashion with better
\nexplanations but its time for me to go to bed!<\/p>\n\n<\/p>\n
\t Man how verbose no wonder I don’t
\npost as much as I should!<\/p>\n<\/p>\n
Dude I even have charts from Wikipedia:<\/p>\n
<\/p>\n
<\/p>\n
\n
![\"Linux](\"http:\/\/upload.wikimedia.org\/wikipedia\/commons\/thumb\/4\/42\/LVM1.jpg\/300px-LVM1.jpg\")
<\/a><\/p>\nImage via Wikipedia<\/a><\/p>\n<\/div>\n
![\"Unix](\"http:\/\/upload.wikimedia.org\/wikipedia\/commons\/thumb\/5\/5f\/Unix_filesystem.png\/300px-Unix_filesystem.png\")
<\/a><\/p>\nImage via Wikipedia<\/a><\/p>\n<\/div>\n
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<\/a><\/span><\/div>\n","protected":false},"excerpt":{"rendered":"p { margin-bottom: 0.08in; } I used the “-r” option to resize the underlying filesystem with the “lvextend” command for the first time. The “-r” option allowed the logical volume & filesystem to be extended with just one command. I … Continue reading
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