Jump to content

Horribly slow Duplicates


Recommended Posts

Having problems with Duplicate scripts. This script duplicates a directory with a storageset file in it on an iMac/400/128/OSX internal drive to an external Firewire (QPS 60Gb).

 

 

 

FIRST, notice the Miscompare error:

 

 

 

4/3/2002 1:23:11 AM: Copying Mark on Backup…

 

4/3/2002 3:56:01 AM: Comparing Mark02 on Storage2…

 

File “MarkDaily”: miscompare at data offset 1,632,858,112, path: “Mark/MarkDaily”.

 

4/3/2002 4:03:32 AM: 1 execution errors.

 

Completed: 1 files, 2.7 GB

 

Performance: 33.8 MB/minute (17.7 copy, 361.3 compare)

 

 

 

Realizing I had not power-cycled the drives when I loaded OSX on the system, I brough the entire system down and power-cycled the external Firewire drives as well.

 

 

 

Second, notice the HORRENDOUS copy times: 2hr, 33min for 2.7Gb (17.7Mb/min)

 

 

 

A direct finder copy of the same file took 4min, 4sec (about 650Mb/min). Can this be real? I suppose I should use a CRON job to copy the file instead of Retrospect, eh? That's pretty bad.

Link to comment
Share on other sites

I was working this morning to pin down this slowness, but can't reproduce the problem at the moment.

 

 

 

With Backup Server running, ScreenSaver kicked in, I was getting a minimum of about 225Mb/Min on the duplicate script today. Testing with and without the screensaver (OSX "Basic") showed that the screen saver slows down the duplicates by about 17% - but nothing that would account for the earlier 80%+ degredation in speed.

 

 

 

I noticed that when I was getting very poor rates before, performance appeared to degrate considerably after midnight. Does anyone know of issues that affect performance after midnight on an OSX machine? I think it runs some indexing routines at midnight that might affect performance.

Link to comment
Share on other sites

Archived

This topic is now archived and is closed to further replies.

×
×
  • Create New...