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create_xml_data: simplify to mappings; drop all units

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This commit is contained in:
Heinz Mauelshagen 2013-06-28 13:43:59 +02:00
parent fe4776f2cb
commit 9e32e25ac4
1 changed files with 20 additions and 64 deletions
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thin-provisioning/create_xml_data
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@ -2,7 +2,7 @@
#
# Copyright (C) 2013 Red Hat, GmbH
#
# Simple XML metadata creation tool
# Simple thinp provisioning XML metadata creation tool
#
require 'optparse'
@ -12,65 +12,25 @@ require 'pathname'
$prg = Pathname.new($0).basename
def init_units
units = {}
units[:bytes_per_sector] = 512
units[:chars] = "bskKmMgGtTpPeEzZyY"
units[:strings] = [ 'bytes', 'sectors',
'kilobytes', 'kibibytes', 'megabytes', 'mebibytes',
'gigabytes', 'gibibytes', 'terabytes', 'tebibytes',
'petabytes', 'pebibytes', 'exabytes', 'ebibytes',
'zetabytes', 'zebibytes', 'yottabytes', 'yobibytes' ]
units[:factors] = [ 1, units[:bytes_per_sector] ]
1.step(8) { |e| units[:factors] += [ 1024**e, 1000**e ] }
units
end
def get_index(unit_char, units)
unit_char ? units[:chars].index(unit_char) : 1
end
def to_sectors(size, units)
a = size.split(/[#{units[:chars]}]/)
s = size.to_i.to_s
abort "#{$prg} - only one unit character allowed!" if a.length > 1 || size.length - s.length > 1
abort "#{$prg} - invalid unit specifier!" if s != a[0]
size.to_i * units[:factors][get_index(size[a[0].length], units)] / units[:bytes_per_sector]
end
def check_opts(opts)
abort "#{$prg} - 3 arguments required!" if opts.length < 3
abort "#{$prg} - block size must be > 0" if opts[:blocksize] <= 0
abort "#{$prg} - thin size must be much greater/equal blocksize" if opts[:thinsize] < opts[:blocksize]
abort "#{$prg} - number of thin provisioned devices or snapshots must be > 0" if opts[:thins].nil? || opts[:thins] == 0
abort "#{$prg} - size variation too large!" if !opts[:variation].nil? && (opts[:variation] > 2 * (opts[:thinsize] - opts[:blocksize]))
abort "#{$prg} - block size must be 2^^N with N > 1" if opts[:blocksize] < 2 || (opts[:blocksize] & opts[:blocksize] - 1)
abort "#{$prg} - mappings must be > 0" if opts[:mappings] < 1
abort "#{$prg} - number of thin provisioned devices or snapshots must be > 0" if opts[:thins].nil? || opts[:thins] < 1
abort "#{$prg} - size variation too large!" if !opts[:variation].nil? && (opts[:mappings] < 2 || (opts[:variation] >= 2 * (opts[:mapings] - 1)))
end
def parse_command_line(argv, units)
def parse_command_line(argv)
opts = {}
os = OptionParser.new do |o|
o.banner = "Thin Provisioning XML Test Metadata Generator.\nUsage: #{$prg} [opts]"
o.on("-b", "--block-size BLOCKSIZE[#{units[:chars]}]", String,
"Block size of thin provisioned devices.") do |bs|
opts[:blocksize] = to_sectors(bs, units)
end
o.on("-s", "--thin-size SIZE[#{units[:chars]}]", String, "Average size of thin devices and snapshots.") do |sz|
opts[:thinsize] = to_sectors(sz, units)
end
o.on("-r", "--range-mappings", "Create range mappings") do
opts[:range] = true
end
o.on("-t", "--thins #THINS", Integer, "Sum of thin devices and snapshots.") do |mt|
opts[:thins] = mt
end
o.on("-v", "--size-variation SIZE[#{units[:chars]}]", String, "Size variation of thin devices and snapshots.") do |sv|
opts[:variation] = to_sectors(sv, units)
end
o.on("-h", "--help", "Output this help.") do
puts o
exit
end
o.on("-b", "--block-size #SECTORS", Integer, "Block size of thin provisioned devices in sectors.") { |bs| opts[:blocksize] = bs }
o.on("-m", "--mappings #MAPPINGS", Integer, "Number of mappings per thin device or snapshot.") { |m| opts[:mappings] = m }
o.on("-r", "--range-mappings", "Create range mappings") { opts[:range] = true }
o.on("-t", "--thin-devices #THINS", Integer, "Sum of thin devices and snapshots.") { |mt| opts[:thins] = mt }
o.on("-v", "--variations SIZE]", Integer, "Mapping variation of thin devices and snapshots.") { |mv| opts[:variation] = mv }
o.on("-h", "--help", "Output this help.") { puts o; exit }
end
begin
@ -107,24 +67,20 @@ def range_mapping(from, to, length)
" <range_mapping origin_begin=\"#{from}\" data_begin=\"#{to}\" length=\"#{length}\" time=\"1\"/>"
end
def blocks(opts)
opts[:thinsize] / opts[:blocksize]
def this_mappings(opts)
opts[:variation].nil? ? opts[:mappings] : ((2 * opts[:mappings] - rand(opts[:variation])) / 2)
end
def this_blocks(opts)
opts[:variation].nil? ? blocks(opts) : (2 * opts[:thinsize] - rand(opts[:variation])) / 2 / opts[:blocksize]
end
def xml_metadata(opts, units)
blks, dev_id, nr_data_blocks, to = [], 0, 0, 0
def xml_metadata(opts)
mappings, dev_id, nr_data_blocks, to = [], 0, 0, 0
0.step(opts[:thins] - 1) do
blks << (b = this_blocks(opts))
nr_data_blocks += b
mappings << (m = this_mappings(opts))
nr_data_blocks += m
end
puts begin_superblock(opts[:blocksize], nr_data_blocks)
blks.each do |b|
mappings.each do |b|
if opts[:range]
puts begin_device(dev_id, b), range_mapping(0, to, b), end_device
else
@ -142,4 +98,4 @@ end
#----------------------------------------------------------------
# Main
#
xml_metadata(parse_command_line(ARGV, (units = init_units)), units)
xml_metadata(parse_command_line(ARGV))