tar -xzf

hi,
 how can i make the tar -xzf faster?

Bcos, it only use 5 % of my server cpu process ?

can i adjust it to 20% or more than that?

thanx
bsherAsked:
Who is Participating?
 
jacquesc030600Commented:
try tar xzfb with a blocking factor
0
 
tfewsterCommented:
The main limitation on tar will be disk speed, i.e. time taken to read the archive and write files to disk. You can use sar -d to monitor disk & tape drive activity; %busy for the slowest device should be approaching 100% - If not, you can look at balancing the load on disks & SCSI channels
0
 
bsherAuthor Commented:
Giv more detail
0
 
tfewsterCommented:
Who do you want more detail from?

BTW, you have to use the same blocking factor (or greater) when reading the archive than when writing it:

man tar
 .
 .
- b        Blocking Factor. Use when reading  or  writing  to
               raw  magnetic  archives  (see  f below). The block
               argument specifies the  number  of  512-byte  tape
               blocks to be included in each read or write opera-
               tion performed on the tarfile. The minimum  is  1,
               the default is 20. The maximum value is a function
               of the amount of memory available and the blocking
               requirements  of the specific tape device involved
               (see mtio(7I) for  details.)  The  maximum  cannot
               exceed INT_MAX/512 (4194303).

               When a tape archive  is  being  read,  its  actual
               blocking  factor  will  be automatically detected,
               provided that it is less than or equal to the nom-
               inal blocking factor (the value of the block argu-
               ment, or the default value if the  b  modifier  is
               not  specified).  If the actual blocking factor is
               greater than the nominal blocking factor,  a  read
               error will result.
 .
 .
0
 
bsherAuthor Commented:
Answer accepted
0
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

All Courses

From novice to tech pro — start learning today.