Re: About Linus's condemnation of Dump
Hi,
you have recognized this message was from 2001, yes?
shortly after linus message this has bee discussed here very deeply.
if you are interested in it, please go to the mailinglist-archives
and read the corresponding thread.
The result was more or less the folowing:
if you use dump the way it is designed to, you won't get in trouble
with its backups.
but dump on linux is designed only to do backups of ext2-fs, so you
won't be able at all to use it with your reiser-fs disks.
Christoph
Scott Phelps wrote:
I just stumbled over an email from Linus stating the following:
snip snip
Note that dump simply won't work reliably at all even in 2.4.x: the buffer
cache and the page cache (where all the actual data is) are not
coherent. This is only going to get even worse in 2.5.x, when the
directories are moved into the page cache as well.
So anybody who depends on dump getting backups right is already playing
russian rulette with their backups. It's not at all guaranteed to get the
right results - you may end up having stale data in the buffer cache that
ends up being backed up.
Dump was a stupid program in the first place. Leave it behind.
end snip
Read whole thing here:
http://www.cs.helsinki.fi/linux/linux-kernel/2001-16/1175.html
Anyhoo, I find myself currently using the Reiser filesystem, and I am now
considering backing up critical config files and directories on my servers
with tar and rebuilding them from scratch using XFS since that filesystem has
a working version of dump ('xfsdump').
Any comments, advice? (Does Amanda even work with xfsdump/xfsrestore?
Thanks,
Scott Phelps
Re: About Linus's condemnation of Dump
On Sat, 6 Sep 2003 at 8:26pm, Scott Phelps wrote
Read whole thing here:
http://www.cs.helsinki.fi/linux/linux-kernel/2001-16/1175.html
As has been mentioned, this has been hashed over on this list on multiple
occasions, so check the archives.
Anyhoo, I find myself currently using the Reiser filesystem, and I am now
considering backing up critical config files and directories on my servers
with tar and rebuilding them from scratch using XFS since that filesystem has
a working version of dump ('xfsdump').
Well, there is no 'dump' for Reiser -- all dump programs are FS specific.
And a lot of trust tar just find, so there's really no reason to switch
FSs just to get a working dump.
Any comments, advice? (Does Amanda even work with xfsdump/xfsrestore?
Yep -- works just fine.
--
Joshua Baker-LePain
Department of Biomedical Engineering
Duke University
About Linus's condemnation of Dump
I just stumbled over an email from Linus stating the following:
snip snip
Note that dump simply won't work reliably at all even in 2.4.x: the buffer
cache and the page cache (where all the actual data is) are not
coherent. This is only going to get even worse in 2.5.x, when the
directories are moved into the page cache as well.
So anybody who depends on dump getting backups right is already playing
russian rulette with their backups. It's not at all guaranteed to get the
right results - you may end up having stale data in the buffer cache that
ends up being backed up.
Dump was a stupid program in the first place. Leave it behind.
end snip
Read whole thing here:
http://www.cs.helsinki.fi/linux/linux-kernel/2001-16/1175.html
Anyhoo, I find myself currently using the Reiser filesystem, and I am now
considering backing up critical config files and directories on my servers
with tar and rebuilding them from scratch using XFS since that filesystem has
a working version of dump ('xfsdump').
Any comments, advice? (Does Amanda even work with xfsdump/xfsrestore?
Thanks,
Scott Phelps
Re: About Linus's condemnation of Dump
On Sat, 6 Sep 2003, Scott Phelps wrote: Dump was a stupid program in the first place. Leave it behind. Linus has been bad-mouthing dump for as long as I can remember. Linus is obviously not a sysadmin or he would have more clue than this. Any comments, advice? (Does Amanda even work with xfsdump/xfsrestore? Works fine on IRIX. I haven't tried it on Linux, yet. Probably should. -Mitch
