Re: dump on mounted fs

2002-07-26 Thread Dan Nelson
In the last episode (Jul 26), Brandon D. Valentine said: On Fri, 19 Jul 2002, David Miller wrote: A year ago there was a problem with backing up files larger than either 2GB or 4GB, I forget which. A beta version of star would handle it, but all the native versions of tar and gtar failed.

Re: dump on mounted fs

2002-07-26 Thread Brandon D. Valentine
On Fri, 19 Jul 2002, David Miller wrote: A year ago there was a problem with backing up files larger than either 2GB or 4GB, I forget which. A beta version of star would handle it, but all the native versions of tar and gtar failed. That's often not a problem, but if you're backing up db

Re: dump on mounted fs

2002-07-23 Thread Dan Nelson
In the last episode (Jul 21), [EMAIL PROTECTED] said: On Thu, 18 Jul 2002, Mark W. Krentel wrote: Dump on a live FS is always risky. FreeBSD in 4.x and earlier will have up to about a 30 second delay before a write() makes it to physical disk. Is this regardless of the sync(8)

Re: dump on mounted fs

2002-07-21 Thread dirkx
On Thu, 18 Jul 2002, Mark W. Krentel wrote: Dump on a live FS is always risky. FreeBSD in 4.x and earlier will have up to about a 30 second delay before a write() makes it to physical disk. Is this regardless of the sync(8) command used ? And if so - what does sync(8) actually sync - and

Re: dump on mounted fs

2002-07-19 Thread David Malone
Do you check your backups, or does Amanda do it for you? I think dump is on the way out in Linux. I've managed to restore them when needed (despite Redhat's best efforts over the years, including shipping a version of restore that couldn't restore symlinks). In general we don't store users

Re: dump on mounted fs

2002-07-18 Thread Mark W. Krentel
Dump on a live FS is always risky. FreeBSD in 4.x and earlier will have up to about a 30 second delay before a write() makes it to physical disk. Ok, assume all the writes have finished, we wait 1-2 minutes before starting dump, no new writes happen during the dump, then are we assured that

Re: dump on mounted fs

2002-07-18 Thread Mark W. Krentel
After upgrading some Redhat machines to 1GB of ram it became nearly impossible to dump any filesystem without dump going crazy trying to read nonexistant blocks (previously it had worked fine). Upgrading the version of the linux dump program which we use helped significantly and now we can

Re: dump on mounted fs

2002-07-17 Thread Peter Wemm
Mark W. Krentel wrote: Dump still works on a mounted file system in Freebsd, right? That is, a write that completes before dump is started will be in the dump, even if the data is in memory? I don't mean writing to a file during the dump, that's a separate problem. I only recently

Re: dump on mounted fs

2002-07-17 Thread David Malone
On Wed, Jul 17, 2002 at 01:29:53AM -0400, Mark W. Krentel wrote: I only recently learned that this doesn't work in Linux and I wanted to check that it's (still?) ok in Freebsd. Apparently, in the 2.4 Linux kernels, the buffer and page caches make it impossible for dump to always get the

dump on mounted fs

2002-07-16 Thread Mark W. Krentel
Dump still works on a mounted file system in Freebsd, right? That is, a write that completes before dump is started will be in the dump, even if the data is in memory? I don't mean writing to a file during the dump, that's a separate problem. I only recently learned that this doesn't work in