Re: Slow creating lots of files...

2003-11-21 Thread Kris Kennaway 
On Fri, Nov 21, 2003 at 02:57:41PM -0500, Marco Greene (Home) wrote:
 Doing some further research into my NetBackup slow restore performance...I
 have noticed that if I create a lot of small filesit can take about 10
 times as long as creating one big file of the same size.

Well, that doesn't sound too abnormal to me..creating lots of small
files is a lot more work for the drive.  You forgot to mention details
of your FreeBSD version and configuration (such as FS mount options,
kernel config, full hardware details, etc).  Obviously, these can make
all the difference to analyzing your problem.

Kris


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RE: Slow creating lots of files...

2003-11-21 Thread Derrick Ryalls 
 On Fri, Nov 21, 2003 at 02:57:41PM -0500, Marco Greene (Home) wrote:
  Doing some further research into my NetBackup slow restore 
  performance...I have noticed that if I create a lot of small 
  filesit can take about 10 times as long as creating one 
 big file 
  of the same size.

Ever install Rainbow 6?  That install could take almost an hour from 1 cd.
If they had zip'ed the files transferred and unzipped, it would have been
much faster.

With lots of small files, you have seek, read, seek, read, etc.  With one
big file, seek, read, read, read...

I am not an expert on this, but it doesn't sound very abnormal.

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