Escali 4.4 Manual Do Utilizador

To ease usage of Scali software on large cluster configuration, many of the command line 
utilities have bracket expansion and grouping functionality.

The following syntax applies:

<bracket>

== "["<number_or_range>[,<number_or_range>]*"]"

<number_or_range>

== <number> | <from>-<to>[:<stride>]

<number>

== <digit>+

<from>

== <digit>+

<to>

== <digit>+

<stride>

== <digit>+

<digit>

== 0|1|2|3|4|5|6|7|8|9

This is typically used to expand nodenames from a range, using  from  1 to multi-dimensional 
numbering, or an explicit list.

If  <to> or <from> contains leading zeros, then the expansion will contain leading zeros such 
that the width is constant and equal to the larger of the widths of <to> and <from>.

The syntax does not allow for negative numbers. <from> does not have to be less that <to>.

n[0-2]
is equivalent to
n0 n1 n2

n[00-10:3]
is equivalent to
n00 n03 n06 n09

Utilities  that use scagroup will accept a group alias wherever a host name of hostlist i expected. 
The group alias will be resolved to a list of  hostnames  as  specified in the file scagroup config 
file. If there exists a file .scagroup.conf in the users home directory, this will  be used. 
Otherwise,  the system default file /opt/scali/etc/scagroup.conf will be used.

D-2.1 File format
Each group has the keyword group at the beginning of a line followed by a group alias and a 
list of hostnames included in the group. The list may itself contain previously defined group  
aliases which will be recursivly resolved. The host list may use bracket expressions which
will be resolved as specified above.

The file may contain comments which is a line starting with # .

Examples:
       group master n00
       group slaves n[01-32]
       group all master slaves