Converting a iostat output to a PCP archive

This example uses the PCP::LogImport Perl wrapper around the libpcp_import
library to convert a sadc datafile into a PCP archive.

The version of iostat that is supported here is the one from
http://freshmeat.net/projects/sysstat and provides the following
reporting options:

-t	Add timestamps like 27/07/10 12:47:34 ahead of each sample.
	If $S_TIME_FORMAT=ISO in the environment, then the format changes
	to 2010-07-27T12:46:07+1000

	The default is to not include any timestamps.

	Start date is on first line
	Linux 2.6.32-23-generic (bozo) 	27/07/10 	_i686_	(1 CPU)

-z	supress activity for idle devices

-k	Disk activity in Kilobytes not blocks
	Device:            tps    kB_read/s    kB_wrtn/s    kB_read    kB_wrtn

-m	Disk activity in megabytes not blocks
	Device:            tps    MB_read/s    MB_wrtn/s    MB_read    MB_wrtn

-c	CPU utilization
	avg-cpu:  %user   %nice %system %iowait  %steal   %idle
	          75.00    0.00   25.00    0.00    0.00    0.00

-d	Disk activity
	Device:            tps   Blk_read/s   Blk_wrtn/s   Blk_read   Blk_wrtn
	sda               9.27        42.38       135.10        128        408
	sdb              83.44       182.78      1634.44        552       4936
	scd0              0.00         0.00         0.00          0          0

-n	NFS report
	Filesystem:              rBlk_nor/s   wBlk_nor/s   rBlk_dir/s   wBlk_dir/s   rBlk_svr/s   wBlk_svr/s    rops/s    wops/s

-x	Extended disk activity
	Device:         rrqm/s   wrqm/s     r/s     w/s   rsec/s   wsec/s avgrq-sz avgqu-sz   await  svctm  %util
	sda               0.00    10.30    0.00    4.32     0.00   116.94    27.08     0.00    0.31   0.31   0.13
	sdb               0.00    83.39    0.33   10.63     2.66   754.82    69.09     0.05    4.36   0.85   0.93
	scd0              0.00     0.00    0.00    0.00     0.00     0.00     0.00     0.00    0.00   0.00   0.00

-p	like -d but for partitions (example below is with -z)
	Device:            tps   Blk_read/s   Blk_wrtn/s   Blk_read   Blk_wrtn
	sda               2.99         0.00        77.08          0        232
	sda1              2.99         0.00        77.08          0        232
	sdb              20.60         2.66       890.37          8       2680
	sdb6             20.60         2.66       890.37          8       2680

Usage: iostat2pcp infile archive

The translation currently supports the following PCP metrics:
    disk.all.read
    disk.all.read_bytes
    disk.all.total
    disk.all.total_bytes
    disk.all.write
    disk.all.write_bytes
    disk.dev.avactive
    disk.dev.read_bytes
    disk.dev.total
    disk.dev.total_bytes
    disk.dev.write_bytes
    kernel.all.cpu.idle
    kernel.all.cpu.intr
    kernel.all.cpu.nice
    kernel.all.cpu.sys
    kernel.all.cpu.user
    kernel.all.cpu.wait.total
    kernel.all.intr
    kernel.all.load
    kernel.all.pswitch
    kernel.percpu.cpu.idle
    kernel.percpu.cpu.intr
    kernel.percpu.cpu.nice
    kernel.percpu.cpu.sys
    kernel.percpu.cpu.user
    kernel.percpu.cpu.wait.total
    mem.util.bufmem
    mem.util.cached
    mem.util.free
    mem.util.swapCached
    mem.util.swapFree
    mem.util.used
    mem.vmstat.pgfault
    mem.vmstat.pgfree
    mem.vmstat.pgmajfault
    mem.vmstat.pgpgin
    mem.vmstat.pgpgout
    network.interface.collisions
    network.interface.in.bytes
    network.interface.in.drops
    network.interface.in.errors
    network.interface.in.fifo
    network.interface.in.frame
    network.interface.in.packets
    network.interface.out.bytes
    network.interface.out.carrier
    network.interface.out.drops
    network.interface.out.errors
    network.interface.out.fifo
    network.interface.out.packets
    proc.runq.runnable
    swap.pagesin
    swap.pagesout
    vfs.dentry.count
    vfs.files.count
    vfs.inodes.count

This is sufficient to support the following standard pmchart views:
    CPU
    Disk
    Diskbytes
    Loadavg
    Memory
    Netbytes
    Netpackets
    Overview (except for a lesser memory stats)
    Paging