Re: Ten percent test

Mike Galbraith
2007-04-09T04:17:56Z

On Sun, 2007-04-08 at 13:56 -0400, Gene Heskett wrote:
> On Sunday 08 April 2007, Mike Galbraith wrote:
> >On Sun, 2007-04-08 at 07:33 -0400, Gene Heskett wrote:
> >> That seems to be the killer loading here, building a kernel (make -j3)
> >> doesn't seem to lag it all that bad. One session of gzip -best makes
> >> it fall plumb over though, which was a disappointment.
> >
> >Can you make a testcase that doesn't require amanda?
> >
> > -Mike
>
> Sure. Try 'tar czf nameofarchive.tar.gz /path/to-dir-to-be-backed-up'
>
> Or, from the runtar log from this morning, and this is all one line:
>
> runtar.20070408022016.debug:running: /bin/tar: 'gtar' '--create' '--file' '-' '--directory' '/usr/dlds-rpms' '--one-file-system' '--listed-incremental' '/usr/local/var/amanda/gnutar-lists/coyote_usr_dlds-rpms_1.new' '--sparse' '--ignore-failed-read' '--totals' '--exclude-from' '/tmp/amanda/sendbackup._usr_dlds-rpms.20070408022016.exclude' '.'
>
> and amanda will if requested, pipe that output through a |gzip -best, and
> its this process that brings the machine to the table begging for scraps
> like a puppy. Tar by itself can be felt but isn't bad.

So tar -cvf - / | gzip --best | tar -tvzf - should reproduce the
problem?

-Mike