tobert

#!/bin/bash

COUNT=10
BRIDGE="br1"
FORMAT="lxc%d"
PARENT=$(hostname --fqdn)
LXC_ROOT=/srv/virt/lxc
OS_ROOT=/srv/virt/lxc/base/root

for num in $(seq 1 $COUNT)

tobert

#!/bin/bash

vmname=$(hostname --fqdn)

mkdir -p /p2v-nfs /p2v-new
mount -t nfs 192.168.1.9:/incoming /p2v-nfs

dd if=/dev/zero of=/mnt/p2v/$vmname-root.img bs=11 skip=20G count=1

mount -o loop /p2v-nfs/$vmname-root.img /p2v-new

tobert

{
   "servers" : [
      {
         "port" : "NAMENODE_JMX_PORT",
         "host" : "NAMENODE",
         "numQueryThreads" : 8,
         "queries" : [
            {
               "outputWriters" : [
                  {

tobert

 1m   5m  15m | read  writ|run blk new| used  buff  cach  free|  in   out | read  writ| int   csw |usr sys idl wai hiq siq| recv  send
44.2 44.2 44.4|   0  7.90 | 48   0  40|3441M 52.0M  304M 4376M|   0     0 |   0   286k|1291  3470 | 88  12   0   0   0   0| 203k 7251B
44.3 44.2 44.4|0.70  11.3 | 46   0  55|3265M 52.0M  325M 4530M|  19k    0 |  19k  272k|1844  3367 | 85  15   0   0   0   0|2226k   36k
44.1 44.2 44.4|   0  2.30 | 46   0  50|3415M 52.0M  352M 4353M|   0     0 |   0    26k|1804  3166 | 85  15   0   0   0   0|2764k   30k
44.6 44.3 44.4|   0  23.9 | 48 0.1  50|3439M 52.0M  350M 4332M|   0     0 |   0   951k|2113  3373 | 85  14   0   0   0   1|5052k  398k
44.4 44.3 44.4|0.10   205 | 45 0.1  53|3402M 52.1M  383M 4336M|   0     0 | 410B 8166k|2162  3718 | 84  15   0   0   0   1|3612k 1202k
44.9 44.4 44.4|   0  0.80 | 48   0  38|3398M 52.1M  308M 4414M|   0     0 |   0    16k|2204  3522 | 85  14   0   0   0   1|4986k   70k
45.4 44.5 44.4|   0  61.4 | 45 0.1  50|3348M 52.1M  376M 4397M|   0     0 |   0

tobert

# a fragment ...

echo "Creating $LXC_DIR/lxc.conf ..."
cat > $LXC_DIR/lxc.conf <<EOF
lxc.utsname = $LXC_UTSNAME
lxc.rootfs = $LXC_ROOTFS
lxc.cgroup.cpuset.cpus = 0,1
lxc.cgroup.cpu.shares = 500
lxc.mount.entry=none proc    proc   nodev,noexec,nosuid 0 0
lxc.mount.entry=none dev/shm tmpfs  defaults 0 0

tobert

#!/bin/bash

# this script installs LXC inside the container to provide
# /usr/lib64/lxc/lxc-init for use with lxc-execute
#
# The lxc-el5-x86_64 repository is locally generated using
# a locally-created package.  LXC had to be hacked to work around 
# usage of some newer Linux capabilities features to compile
# on CentOS 5.x.   This version of LXC probably shouldn't be
# used to run containers; for production we'll use EL6 VM's

tobert

          hostname:    eth0_total     eth0_recv     eth0_send     read_iops     write_iops      1min  5min 15min
----------------------------------------------------------------------------------------------------------------
   ec2-xx-xx-xx-xx:           816           124           692           0/s       13,765/s      1.01  1.02  1.00
  ec2-xx-xx-xxx-xx:           786           113           673           0/s       19,116/s      1.00  1.02  1.00
 ec2-xx-xx-xxx-xxx:           784           113           671           0/s       15,573/s      1.10  1.08  1.09
  ec2-xx-xx-xx-xxx:           798           120           678           0/s       13,045/s      1.09  1.05  1.01
ec2-xx-xxx-xxx-xxx:           786           113           673           0/s        3,008/s      1.02  1.03  1.00
  ec2-xx-xxx-xx-xx:           761           120           641           0/s            0/s      0.00  0.00  0.00
 ec2-xx-xx-xxx-xxx:           800           120           680           0/s        3,100/s      1.03  1.04  1.00
   ec2-

tobert

           hostname:    eth0_total     eth0_recv     eth0_send     read_iops     write_iops      1min  5min 15min
----------------------------------------------------------------------------------------------------------------
ec2-xxx-xxx-xxx-xxx:           917           131           786           0/s       50,567/s      1.55  1.05  0.46
ec2-xxx-xxx-xxx-xxx:           917           131           786           0/s       39,503/s      1.54  1.01  0.44
ec2-xxx-xxx-xxx-xxx:           917           131           786           0/s       55,467/s      1.32  0.95  0.42
ec2-xxx-xxx-xxx-xxx:           913           131           782           0/s       47,325/s      1.48  0.91  0.40
ec2-xxx-xxx-xxx-xxx:           897           131           766           0/s       12,048/s      1.01  0.75  0.34
ec2-xxx-xxx-xxx-xxx:           972           131           841           0/s       51,665/s      1.35  0.96  0.42
ec2-xxx-xxx-xxx-xxx:           916           131           785           0/s       59,382/s      1.33  0.93  0.42

tobert

#!/bin/bash
# Linux RAID5 tuning
# Al Tobey 2011-09-19 <al@ooyala.com>

for sysent in /sys/block/sd*
do
    drive=$(basename $sysent)
    sector_size=$(blockdev --getss /dev/$drive)

tobert

#!/bin/bash
# THIS WILL DESTROY ALL OF YOUR DATA
# well, almost all of it, it'll try to keep root around, but no guarantees

echo "Disabling RAID devices ..."
for raid in /dev/md*
do
  grep -q $raid /proc/mounts && umount $raid
  grep -q $raid /proc/mounts || \ # continue if NOT present
  mdadm --stop $raid || \