Converting a sadc data file 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 sar that is supported here is the one from
http://freshmeat.net/projects/sysstat/ which includes the sadf utility
to translate the sadc datafile into an XML file.  The Perl script
sar2pcp runs sadf and translates the XML into a PCP archive.

Usage: sar2pcp sadcfile 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