Server Cloning application

[Harold Hallikainen]

> So gl4 will make the image as big as the filesystem you are cloning?
>
> Meaning if the server is 53GB with only 4GB being used by OS and app,
> then the image will copy the entire disk?
>
> Therefore the image will be about 53GB in size or do I have that wrong?
>
>

g4l includes an application that puts nulls in all unused bytes on the
disk. You can then tell it to create an image of the entire disk, but with
compression (I use gzip). The null bytes compress pretty well!

Harold




>
>> -----Original Message-----
>> From: redhat-install-list-bounces at redhat.com
>> [mailto:redhat-install-list-bounces at redhat.com] On Behalf Of
>> Rick Stevens
>> Sent: Tuesday, March 06, 2007 12:29 PM
>> To: Getting started with Red Hat Linux
>> Subject: Re: Server Cloning application
>>
>> On Tue, 2007-03-06 at 11:02 -0500, mylar wrote:
>> > On Mon, 2007-03-05 at 09:48 -0800, Rick Stevens wrote:
>> > > On Mon, 2007-03-05 at 10:11 -0600, Esquivel, Vicente wrote:
>> > > > Hello all,
>> > > >
>> > > > Can anyone tell me what they use for cloning RH servers?
>> > >
>> > > Ghost4Linux (g4l) works well.  Good ol' ghost 2003 works, too.
>> > > We also use a disk duplicator.  Expensive, but a good way to clone
>> > > 5+ disks at a time.
>> > >
>> > Is there any advantage to using g4l over something like dd ???
>>
>> You can't use dd if the disks are dissimilar or the partition
>> sizes are different.  dd is only really reliable with
>> absolutely identical disks, and even then I'm skeptical as it
>> does absolutely no error checking.
>>
>> g4l can handle dissimilar partitions, disks and such and does
>> a fair bit of error checking.  g4l is freeware.  Use it.
>>
>> 	http://sourceforge.net/projects/g4l
>>
>> ----------------------------------------------------------------------
>> - Rick Stevens, Principal Engineer          rstevens at vitalstream.com -
>> - VitalStream, Inc.                       http://www.vitalstream.com -
>> -                                                                    -
>> -  A friend said he climbed to the top of Mount Ranier.  My view is  -
>> -    that if there's no elevator, it must not be that interesting.   -
>> ----------------------------------------------------------------------
>>
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