Hi,
I’ve got some code which seems to work well, but the warning messages
are driving me insane! I can’t use this code if it’s always going to
spew warnings like these on a CentOS 5.2 system with ruby 1.8.5
(2006-08-25) [i386-linux] as the environment. I’m also using
slave-1.2.1 from http://www.codeforpeople.com
as well.
$ ./readdir-slave-only.rb --kids 4 tmp
Starting Slave Counter
Exception DRb::DRbBadScheme' at /usr/lib/ruby/1.8/drb/drb.rb:814 - drbunix:///tmp/slave_counter_537520870_11835_11836_0_0.697410256497375 Exception DRb::DRbBadScheme’ at /usr/lib/ruby/1.8/drb/drb.rb:814 -
drbunix:///tmp/slave_counter_537520870_11835_11836_0_0.697410256497375
Exception DRb::DRbBadScheme' at /usr/lib/ruby/1.8/drb/drb.rb:814 - drbunix:///tmp/slave_counter_537520870_11835_11836_0_0.697410256497375 Exception DRb::DRbBadScheme’ at /usr/lib/ruby/1.8/drb/drb.rb:814 -
drbunix:///tmp/slave_counter_537520870_11835_11836_0_0.697410256497375
Exception `DRb::DRbBadScheme’ at /usr/lib/ruby/1.8/drb/drb.rb:814 -
drbunix:///tmp/slave_counter_537520870_11835_11836_0_0.697410256497375
counter.count=0
counter.max=4
@count incremented to 1
Threaded!
Exception DRb::DRbBadScheme' at /usr/lib/ruby/1.8/drb/drb.rb:814 - drbunix:///tmp/slave_proc_537509010_11835_11839_0_0.449993964192234 Exception DRb::DRbBadScheme’ at /usr/lib/ruby/1.8/drb/drb.rb:814 -
drbunix:///tmp/slave_proc_537509010_11835_11839_0_0.449993964192234
Exception `DRb::DRbBadScheme’ at /usr/lib/ruby/1.8/drb/drb.rb:814 -
drbunix:///tmp/slave_proc_537509010_11835_11839_0_0.449993964192234
#kids = 1
Reaped a kid…
@count incremented to 2
I’ve tried to capture these exceptions using ‘begin … rescue … end’
blocks, but I’m obviously not doing something right. What’s frustrating
is that when I pull the code out to just use ‘sleep’ calls, it seems to
work just fine, without all the warnings.
I know my code is quite long, but even so it’s not complete since I need
to insert my results into a DB at some point as well, so just getting
the basics working will be a big help!
Here’s my code:
#!/usr/bin/ruby
require ‘getoptlong’
#require ‘thread’
require ‘slave’
$VERSION = “v1.1”;
$max_slaves = 1
$count = 50
MYURI = “drbunix:/tmp/stoffj-test_” + Process.pid.to_s
opts = GetoptLong.new(
[ “–help”, “-h”, GetoptLong::NO_ARGUMENT],
[ “–kids”, “-k”, GetoptLong::REQUIRED_ARGUMENT]
)
#---------------------------------------------------------------------
class Counter
def initialize(max)
@slaves = []
@max = max
@count = 0
@count_mutex = Mutex.new
end
def count
@count
end
def max
@max
end
Increment the count of slaves, returning 1 if incremented, 0 if not.
def increment
ok = nil
@count_mutex.synchronize do
if (@count < @max) then
@count += 1
puts “@count incremented to #{@count}”
ok = 1
end
end
ok
end
Decrement the count of slaves
def decrement
@count_mutex.synchronize do
if (@count > 1) then
@count -= 1
puts “@count decremented to #{@count}”
end
end
@count
end
end
#---------------------------------------------------------------------
class ReadDir
def initialize(server)
@server = server
end
def readdir(dir)
#puts "readdir(#{dir})"
#sleep 1
size_file = {}
size_dir = {}
size_total = 0
kids = []
# Traverse the directory and collect the size of all files and
# directories
begin
Dir.foreach(dir) do |f|
#print " #{f},"
if(f != "." && f != "..") then
f_full = addpath(dir, f)
stat = File.lstat(f_full)
if(!stat.symlink?) then
if(stat.file?) then
#puts " File: #{f}"
size = File.size(f_full)
size_file[f] = size
size_total += size
end
if(stat.directory?) then
#puts "DIR= #{f}"
if (@server.max < 2) then
#puts " no threads."
size = readdir(f_full)
if (size > 0) then
size_dir[f] = size
size_total += size
end
else
ok = @server.increment
if (ok)
puts " Threaded!"
kids << Slave.object(:async => true, :threadsage =>
true) {
size = readdir(f_full)
@server.decrement
#puts “size = #{size}”
# return the size from the slave properly
size
}
puts “#kids = #{kids.length}”
else
size = readdir(f_full)
if(size > 0) then
size_dir[f] = size
size_total += size
end
end
end
end
end
end
end
end
kids.each { |kid|
puts "Reaped a kid..."
size_total += kid.value
@server.decrement
}
#Puts "Dir: #{dir} = #{size_total}"
return size_total
end
end
#---------------------------------------------------------------------
Read a directory and add to the database; this function is recursive
for sub-directories
#---------------------------------------------------------------------
def usage
puts
puts “usage: readdir-drb [–kids NUM] ”
puts " defaults to #{$max_kids} children"
puts
puts " version: #{$version}"
puts
end
#---------------------------------------------------------------------
def addpath(a, b)
return a + b if(a =~ //$/)
return a + “/” + b
end
#---------------------------------------------------------------------
Main
#---------------------------------------------------------------------
$DEBUG = true
opts.each do |opt,arg|
case opt
when “–kids”
$max_slaves = arg.to_i
else
usage
exit
end
end
if ARGV.length != 1
puts “Missing dir argument (try --help)”
exit 0
end
dir = ARGV.shift
Start the Slave for Counting…
puts “Starting Slave Counter”
slave = Slave.new :object => Counter.new($max_slaves), :async => true
counter = slave.object
puts “counter.count=#{counter.count}”
puts “counter.max=#{counter.max}”
puts
Fire up a new Kid Class readdir.
kid = ReadDir.new(counter)
Now let’s try to do a recursive readdir() algorith with threads.
size = kid.readdir(dir)
sizekb = size / 1024;
sizemb = sizekb / 1024;
sizegb = sizemb / 1024;
puts “”
printf “Total size: %d Bytes\n”, size
printf “Total size: %.2f Kb\n”, sizekb
printf “Total size: %.2f Mb\n”, sizemb
if (sizegb > 1.5)
printf “Total size: %.2f Gb\n”, sizegb
end
