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Home > Archive > Backup Software > August 2005 > Does anyone else use Decremental rather the Incremental Backup?
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| Author |
Does anyone else use Decremental rather the Incremental Backup?
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| Richard 2005-08-22, 8:46 pm |
| I find it easier to use Decremental backups then
it only takes two backup files to replace a what you need
rather than many Incremental files.
Thanks
Richard
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| Andy Lee 2005-08-23, 2:46 am |
| On Mon, 22 Aug 2005 19:18:48 -0400, "Richard" <phony@nosuch.com>
wrote:
>I find it easier to use Decremental backups then
>it only takes two backup files to replace a what you need
>rather than many Incremental files.
>
>Thanks
>Richard
>
Differential is the word you were after . The down side is you use
more storage and they take longer than incrementals.
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| Richard 2005-08-23, 5:47 pm |
| Andy,
Thanks for the reply. I guess they might take longer
but storage wise I would think that one 100 meg
files would take the same as 10 10 meg files. I was
just wondering why most backup software only do
incremental backup.
Richard
"Andy Lee" <andy.lee@siemens.com> wrote in message
news:atilg1l1emruvvp9ksctlcs35bo3hpsdvs@
4ax.com...
> On Mon, 22 Aug 2005 19:18:48 -0400, "Richard" <phony@nosuch.com>
> wrote:
>
>
> Differential is the word you were after . The down side is you use
> more storage and they take longer than incrementals.
| |
| Joe Rom King 2005-08-24, 2:46 am |
| With Relative Rev Bcakup http://www.datamills.com it is possible to take
fast incremental backups, and at the same time restore to any saved version,
as if it was from a full backup.
Joe Rom King
"Andy Lee" <andy.lee@siemens.com> wrote in message
news:atilg1l1emruvvp9ksctlcs35bo3hpsdvs@
4ax.com...
> On Mon, 22 Aug 2005 19:18:48 -0400, "Richard" <phony@nosuch.com>
> wrote:
>
>
> Differential is the word you were after . The down side is you use
> more storage and they take longer than incrementals.
| |
| Andy Lee 2005-08-24, 7:47 am |
| On Tue, 23 Aug 2005 16:47:49 -0400, "Richard" <phony@nosuch.com>
wrote:
>Andy,
>
>Thanks for the reply. I guess they might take longer
>but storage wise I would think that one 100 meg
>files would take the same as 10 10 meg files. I was
>just wondering why most backup software only do
>incremental backup.
>
>Richard
Richard
Most backup software I use (Legato, Backup Exec) can do either
Differential or Incremental. I don't use any of the desktop type
sotware so I can't comment on them but I guess differentials are
really only of much use when restore times are more of an issue i.e.
when you have the MD breathing down your neck when getting all the
company data back after a server loss.
>
>"Andy Lee" <andy.lee@siemens.com> wrote in message
> news:atilg1l1emruvvp9ksctlcs35bo3hpsdvs@
4ax.com...
>
| |
| Jamey Kirby 2005-08-29, 8:47 pm |
| No, that is incorrect. Differential backups use less storage because
ONLY the differences between the last backup are stored. Incremental
simply see if a file of data element has changed. If it has, the entire
file or element is backedup; regardless if the data has actually
changed.
Some differential solutions are very fast; Symantec Like State for
example.
Jamey Kirby
-----Original Message-----
From: Andy Lee [mailto:andy.lee@siemens.com]
Posted At: Tuesday, August 23, 2005 12:11 AM
Posted To: alt.backup-software
Conversation: Does anyone else use Decremental rather the Incremental
Backup?
Subject: Re: Does anyone else use Decremental rather the Incremental
Backup?
On Mon, 22 Aug 2005 19:18:48 -0400, "Richard" <phony@nosuch.com>
wrote:
>I find it easier to use Decremental backups then
>it only takes two backup files to replace a what you need
>rather than many Incremental files.
>
>Thanks
>Richard
>
Differential is the word you were after . The down side is you use
more storage and they take longer than incrementals.
| |
| Joe Rom King 2005-08-31, 2:47 am |
| James
The fact is that differential of incremental backup do not have such a
major effect.
Most backup software takes a full backup usually every week, that is 52
times you are copying your entire data each year. So the fact that
during any week you will change from incremental to differential has a
insignificant affect.
Copying the entire data every week has a profound downside affect on
your network infrastructure. Another consequence is the multiplication
of the backup storage for every retained weekly or monthly backup.
However, bandwidth, backup time, and backup space, are dramatically
reduced with the new breed of software that are capable on every backup
run, (including weekly and monthly) to copy only the changes from the
previous backup.
Relative Rev Backup is such a program, and it will restore any
file/folder from any retained version as if it was from a full backup.
Joe Rom King
DataMills
http://www.datamills.com
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| Jamey Kirby 2005-08-31, 5:53 pm |
| Joe,
You are absolutely correct. In my post, I was assuming we were talking
about new technologies.
Jamey
-----Original Message-----
From: Joe Rom King [mailto:joeromking@yahoo.com]
Posted At: Tuesday, August 30, 2005 11:54 PM
Posted To: alt.backup-software
Conversation: Does anyone else use Decremental rather the Incremental
Backup?
Subject: Re: Does anyone else use Decremental rather the Incremental
Backup?
James
The fact is that differential of incremental backup do not have such a
major effect.
Most backup software takes a full backup usually every week, that is 52
times you are copying your entire data each year. So the fact that
during any week you will change from incremental to differential has a
insignificant affect.
Copying the entire data every week has a profound downside affect on
your network infrastructure. Another consequence is the multiplication
of the backup storage for every retained weekly or monthly backup.
However, bandwidth, backup time, and backup space, are dramatically
reduced with the new breed of software that are capable on every backup
run, (including weekly and monthly) to copy only the changes from the
previous backup.
Relative Rev Backup is such a program, and it will restore any
file/folder from any retained version as if it was from a full backup.
Joe Rom King
DataMills
http://www.datamills.com
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