Dobrica Pavlinušić's random unstructured stuff
OpenVZ: Revision 3
^ OpenVZ
^^ disk speed .pre dpavlin@zut:~$ sudo hdparm -tT /dev/cciss/c1d0 /dev/sda /dev/cciss/c1d0: Timing cached reads: 2184 MB in 2.00 seconds = 1092.39 MB/sec Timing buffered disk reads: 324 MB in 3.02 seconds = 107.40 MB/sec /dev/sda: Timing cached reads: 2144 MB in 2.00 seconds = 1071.89 MB/sec Timing buffered disk reads: 136 MB in 3.02 seconds = 45.02 MB/sec .pre Insert joke about "enterprise storage"<http://images.google.com/images?hl=en&q=enterprise+storage> ^^ Add disk space to VE First, resize logical volume: .pre root@koha-hw:~# vgextend -L +80G /dev/vg/vz vgextend: invalid option -- L Error during parsing of command line. root@koha-hw:~# lvextend -L +80G /dev/vg/vz Extending logical volume vz to 100.00 GB Logical volume vz successfully resized root@koha-hw:~# resize2fs /dev/vg/vz resize2fs 1.40-WIP (14-Nov-2006) Filesystem at /dev/vg/vz is mounted on /vz; on-line resizing required old desc_blocks = 2, new_desc_blocks = 7 Performing an on-line resize of /dev/vg/vz to 26214400 (4k) blocks. The filesystem on /dev/vg/vz is now 26214400 blocks long. root@koha-hw:~# df -h /vz/ Filesystem Size Used Avail Use% Mounted on /dev/mapper/vg-vz 99G 20G 79G 21% /vz .pre Then, take a look how much space does VEs take: .pre root@koha-hw:~# vzlist -o veid,diskspace,diskspace.s,diskspace.h,diskinodes,diskinodes.s,diskspace.h VEID DQBLOCKS DQBLOCKS.S DQBLOCKS.H DQINODES DQINODES.S DQBLOCKS.H 212052 11717220 15728640 20971520 61001 286527 20971520 212226 6407804 10485760 12582912 69011 435472 12582912 .pre alternativly, you can also execute df inside VEs: .pre root@koha-hw:~# vzlist -o veid -H | xargs -i sh -c "echo --{}-- ; vzctl exec {} df -h" --212052-- Filesystem Size Used Avail Use% Mounted on simfs 15G 12G 3.9G 75% / tmpfs 2.0G 0 2.0G 0% /lib/init/rw tmpfs 2.0G 0 2.0G 0% /dev/shm --212226-- Filesystem Size Used Avail Use% Mounted on simfs 10G 6.2G 3.9G 62% / tmpfs 2.0G 0 2.0G 0% /lib/init/rw tmpfs 2.0G 0 2.0G 0% /dev/shm .pre next, we will set diskpace on both VEs (becase we want them to share all available resources) to new logical volume size: .pre root@koha-hw:~# vzlist -o veid -H | xargs -i vzctl set {} --diskspace 100G:100G --save Saved parameters for VE 212052 Saved parameters for VE 212226 .pre This VEs are not in production, and one is development version of another. When we move to production, we want to enforce more strict limit on disk usage, to protect production machine from running out of disk space in case the development one goes wild. |