1pdsh(1)                     General Commands Manual                    pdsh(1)
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NAME

6       pdcp - copy files to groups of hosts in parallel
7       rpdcp - (reverse pdcp) copy files from a group of hosts in parallel
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SYNOPSIS

11       pdcp [options]... src [src2...] dest
12       rpdcp [options]... src [src2...] dir
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DESCRIPTION

16       pdcp  is  a variant of the rcp(1) command.  Unlike rcp(1), which copies
17       files to a single remote host, pdcp can copy files to  multiple  remote
18       hosts  in parallel.  However, pdcp does not recognize files in the for‐
19       mat ``rname@rhost:path,'' therefore all source files  must  be  on  the
20       local  host machine.  Destination nodes must be listed on the pdcp com‐
21       mand line using a suitable target nodelist option (See the OPTIONS sec‐
22       tion below).  Each destination node listed must have pdcp installed for
23       the copy to succeed.
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25       When pdcp receives SIGINT (ctrl-C), it  lists  the  status  of  current
26       threads.   A  second  SIGINT  within one second terminates the program.
27       Pending threads may be canceled by issuing ctrl-Z within one second  of
28       ctrl-C.  Pending threads are those that have not yet been initiated, or
29       are still in the process of connecting to the remote host.
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31       Like pdsh(1), the functionality of pdcp may be supplemented by  dynami‐
32       cally  loadable modules. In pdcp, the modules may provide a new connect
33       protocol (replacing the standard rsh(1)  protocol),  filtering  options
34       (e.g.  excluding  hosts  that  are down), and/or host selection options
35       (e.g. -a selects all nodes from a local config file).  By default, pdcp
36       requires  at least one "rcmd" module to be loaded (to provide the chan‐
37       nel for remote copy).
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REVERSE PDCP

41       rpdcp performs a reverse parallel copy.  Rather than copying  files  to
42       remote hosts, files are retrieved from remote hosts and stored locally.
43       All directories or files retrieved will be  stored  with  their  remote
44       hostname  appended  to  the  filename.   The destination file must be a
45       directory when this option is used.
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47       In other respects, rpdcp is exactly like pdcp, and  further  statements
48       regarding pdcp in this manual also apply to rpdcp.
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RCMD MODULES

52       The  method  by  which pdcp connects to remote hosts may be selected at
53       runtime using the -R option (See OPTIONS below).  This functionality is
54       ultimately  implemented  via  dynamically  loadable modules, and so the
55       list of available options may be different from installation to instal‐
56       lation.  A  list  of  currently  available rcmd modules is printed when
57       using any of the -h, -V, or -L options. The default  rcmd  module  will
58       also be displayed with the -h and -V options.
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60       A list of rcmd modules currently distributed with pdcp follows.
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62       rsh     Uses  an internal, thread-safe implementation of BSD rcmd(3) to
63               run commands using the standard rsh(1) protocol.
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65       ssh     Uses a variant of popen(3) to run multiple copies of the ssh(1)
66               command.
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68       mrsh    This module uses the mrsh(1) protocol to execute jobs on remote
69               hosts.  The mrsh protocol uses a credential  based  authentica‐
70               tion,  forgoing  the  need to allocate reserved ports. In other
71               aspects, it acts just like rsh.
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73       krb4    The krb4 module allows users to execute remote  commands  after
74               authenticating  with  kerberos. Of course, the remote rshd dae‐
75               mons must be kerberized.
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77       xcpu    The xcpu module uses the xcpu service to  execute  remote  com‐
78               mands.
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OPTIONS

82       The  list of available pdcp options is determined at runtime by supple‐
83       menting the list of standard pdcp options with any options provided  by
84       loaded  rcmd and misc modules.  In some cases, options provided by mod‐
85       ules may conflict with each other. In  these  cases,  the  modules  are
86       incompatible and the first module loaded wins.
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Standard target nodelist options

90       -w TARGETS,...
91              Target  and  or  filter  the specified list of hosts. Do not use
92              with any other node selection options (e.g. -a, -g, if they  are
93              available).  No  spaces are allowed in the comma-separated list.
94              Arguments in the TARGETS list may include normal host  names,  a
95              range of hosts in hostlist format (See HOSTLIST EXPRESSIONS), or
96              a single `-' character to read the list of hosts on stdin.
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98              If a host or hostlist is  preceded  by  a  `-'  character,  this
99              causes those hosts to be explicitly excluded. If the argument is
100              preceded by a single `^' character, it is taken to be  the  path
101              to  file  containing  a list of hosts, one per line. If the item
102              begins with a `/' character, it is taken  as a  regular  expres‐
103              sion  on which to filter the list of hosts (a regex argument may
104              also be optionally trailed by another '/',  e.g.   /node.*/).  A
105              regex or file name argument may also be preceeded by a minus `-'
106              to exclude instead of include thoses hosts.
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108              A list of hosts may also be preceded by  "user@"  to  specify  a
109              remote username other than the default, or "rcmd_type:" to spec‐
110              ify an alternate rcmd connection type for these hosts. When used
111              together,   the   rcmd   type  must  be  specified  first,  e.g.
112              "ssh:user1@host0" would use ssh to  connect  to  host0  as  user
113              "user1."
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117       -x host,host,...
118              Exclude  the  specified  hosts.  May be specified in conjunction
119              with other target node list options such  as  -a  and  -g  (when
120              available).  Hostlists  may  also  be specified to the -x option
121              (see the HOSTLIST EXPRESSIONS section below).  Arguments  to  -x
122              may  also  be  preceeded  by  the filename (`^') and regex ('/')
123              characters as described above, in which case the resulting hosts
124              are  excluded as if they had been given to -w and preceeded with
125              the minus `-' character.
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128

Standard pdcp options

130       -h     Output usage menu and quit. A list  of  available  rcmd  modules
131              will be printed at the end of the usage message.
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133       -q     List  option  values  and  the  target nodelist and exit without
134              action.
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136       -b     Disable ctrl-C status feature so that a single ctrl-C kills par‐
137              allel copy. (Batch Mode)
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139       -r     Copy directories recursively.
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141       -p     Preserve modification time and modes.
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143       -e PATH
144              Explicitly  specify  path to remote pdcp binary instead of using
145              the locally executed path. Can also be set via  the  environment
146              variable PDSH_REMOTE_PDCP_PATH.
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148       -l user
149              This  option  may be used to copy files as another user, subject
150              to authorization. For BSD rcmd, this means the invoking user and
151              system  must  be  listed  in  the  user´s .rhosts file (even for
152              root).
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154       -t seconds
155              Set the connect timeout. Default is 10 seconds.
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157       -f number
158              Set the maximum number of simultaneous remote copies to  number.
159              The default is 32.
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161       -R name
162              Set  rcmd  module  to  name. This option may also be set via the
163              PDSH_RCMD_TYPE environment variable. A list  of  available  rcmd
164              modules may be obtained via either the -h or -L options.
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166       -M name,...
167              When multiple misc modules provide the same options to pdsh, the
168              first module initialized "wins" and subsequent modules  are  not
169              loaded.   The -M option allows a list of modules to be specified
170              that will be  force-initialized  before  all  others,  in-effect
171              ensuring  that  they load without conflict (unless they conflict
172              with  eachother).  This  option  may  also  be   set   via   the
173              PDSH_MISC_MODULES environment variable.
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175       -L     List info on all loaded pdcp modules and quit.
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177       -d     Include more complete thread status when SIGINT is received, and
178              display connect and command time statistics on stderr when done.
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180       -V     Output pdcp version information, along with  list  of  currently
181              loaded modules, and exit.
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184

HOSTLIST EXPRESSIONS

186       As  noted  in  sections  above, pdcp accepts ranges of hostnames in the
187       general form: prefix[n-m,l-k,...], where n < m and l < k, etc.,  as  an
188       alternative  to  explicit lists of hosts.  This form should not be con‐
189       fused with  regular  expression  character  classes  (also  denoted  by
190       ``[]'').  For  example,  foo[19]  does  not represent foo1 or foo9, but
191       rather represents a degenerate range: foo19.
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193       This range syntax is meant only as a convenience  on  clusters  with  a
194       prefixNN  naming  convention  and specification of ranges should not be
195       considered necessary -- the list foo1,foo9 could be specified as  such,
196       or by the range foo[1,9].
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198       Some examples of range usage follow:
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201       Copy /etc/hosts to foo01,foo02,...,foo05
202           pdcp -w foo[01-05] /etc/hosts /etc
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204       Copy /etc/hosts to foo7,foo9,foo10
205           pdcp -w foo[7,9-10] /etc/hosts /etc
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207       Copy /etc/hosts to foo0,foo4,foo5
208           pdcp -w foo[0-5] -x foo[1-3] /etc/hosts /etc
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211       As  a  reminder to the reader, some shells will interpret brackets ('['
212       and ']') for pattern matching.  Depending on your shell, it may be nec‐
213       essary  to  enclose  ranged lists within quotes.  For example, in tcsh,
214       the first example above should be executed as:
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216           pdcp -w "foo[01-05]" /etc/hosts /etc
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ORIGIN

220       Pdsh/pdcp was originally a rewrite of IBM dsh(1) by Jim  Garlick  <gar‐
221       lick@llnl.gov>  on  LLNL's  ASCI Blue-Pacific IBM SP system.  It is now
222       also used on Linux clusters at LLNL.
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LIMITATIONS

226       When using ssh for remote execution, stderr of ssh to be folded in with
227       that  of  the remote command.  When invoked by pdcp, it is not possible
228       for ssh to prompt for confirmation if a host key  changes,  prompt  for
229       passwords  if RSA keys are not configured properly, etc..  Finally, the
230       connect timeout is only adjustable with ssh  when  the  underlying  ssh
231       implementation  supports it, and pdsh has been built to use the correct
232       option.
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SEE ALSO

236       pdsh(1)
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240                                   linux-gnu                           pdsh(1)
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