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Full Discussion: Parsing large files in Solaris 11
Top Forums Shell Programming and Scripting Parsing large files in Solaris 11 Post 302952511 by Don Cragun on Wednesday 19th of August 2015 12:53:31 PM
Old 08-19-2015
Quote:
Originally Posted by Corona688
If the records are all of fixed size, dd can be used to insert a newline after them. An example with 4 byte fixed size records:

Code:
# bs is 1 minus the record size, cbs is the record size.
$ printf "AAA:BBB:CCC:DDD:" | dd bs=3 cbs=4 conv=unblock

AAA:
BBB:
CCC:
DDD:

$

dd is unaffected by line length limitations. You chould chain this before an awk or grep or what have you.

Code:
dd if=filename ... | grep whatever

I assume you meant bs=4 instead of bs=3, but when processing a 1.2Gb file, dd will run noticeably faster with its default block size (512 bytes) or a larger size like bs=1024000. The dd bs=n parameter specifies how many bytes dd will read at a time from its input file and how many bytes at a time it will write to its output file.

With conv=unblock, it is just the conversion buffer size (specified by cbs=n) that determines the output line length produced by the dd utility.
 

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LEARN ABOUT X11R4

install-solaris

install-solaris(1M)													       install-solaris(1M)

NAME

       install-solaris - install the Solaris operating system

SYNOPSIS

       install-solaris

       install-solaris	invokes  the  Solaris  Install	program. Depending on graphical capability and available memory at the time of invocation,
       install-solaris invokes either a text-based installer or a graphical installer.

       The following minimum requirements for physical memory dictate which features are available during installation:

       For SPARC machines:

       128 MB

	   Minimum physical memory for all installation types

       128 MB

	   Minimum physical memory required for windowing system

       384 MB

	   Minimum physical memory required for graphical-based installation

       For x86 machines:

       256 MB

	   Minimum physical memory for all installation types

       256 MB

	   Minimum physical memory required for windowing system

       512 MB

	   Minimum physical memory required for graphical-based installation

       In some cases, even if the minimum physical memory is present, available virtual memory after system startup can limit the number  of  fea-
       tures available.

       install-solaris	exists	only  on  the Solaris installation media (CD or DVD) and should be invoked only from there. Refer to the  for more
       details.

       install-solaris allows installation of the operating system onto any standalone system. install-solaris loads the software available on the
       installation media. Refer to the  for disk space requirements.

       Refer to the  for more information on the various menus and selections.

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcdrom  (Solaris instal-  |
       |			     |lation media)		   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Evolving			   |
       +-----------------------------+-----------------------------+

       pkginfo(1), install(1M), pkgadd(1M), attributes(5)

       It is advisable to exit install-solaris by means of the exit options in the install-solaris menus.

								    23 Sep 2005 					       install-solaris(1M)
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