Re: Mac OS X Server problems w/ gzip
On Wed, 15 Nov 2000, Sandra Panesso wrote: > Hi Kevin > > I Want to know if you have tried to run amanda on Mac OS X Beta. If you did > please tell me how was it. My question is because I am testing to run amanda > on Mac OS X Beta but I found some problems when i tried to compiled it. I > used ./configure --with-user= --with-group= --with-updportrange= > --with-portrange= I have not tried AMANDA with Mac OS X Beta. I do know that I had to compile a new version of tar to use with OS X Server and specify a --with-gnutar=/usr/local/bin/tar option to AMANDA. /usr/bin/tar is NOT gnutar and although there is a gnutar installed (/usr/bin/gnutar), its version 1.12 and I wanted to install 1.13.X. Hope that helps. Kevin -- Kevin M. Myer Systems Administrator Lancaster-Lebanon Intermediate Unit 13 (717)-560-6140
Re: Mac OS X Server problems w/ gzip
"Kevin M. Myer" wrote: > Hello, > > Awhile back, I had posted about problems I was having with using AMANDA > with Mac OS X Server. The problems I was seeing related to extremely long > backup times, in excess of 8 hours to backup only 400MB of > data. Apple has disabled ktrace debugging of the kernel so there wasn't > much I could do to figure out where the problem is. However, recently, I > decided to do a set of dumps with compression turned off. It turns out, > thats where the slowdown is occuring. For some reason, the compression > pipe from gzip to tar is extremely slow under Mac OS X Server. Since Mac > OS X Server is in part based on FreeBSD, I was wondering if anyone has > noticed similar situations with FreeBSD? Also, has anyone tested AMANDA > with Mac OS X Beta and do similar problems exist there? > > Thanks, > > Kevin > > -- > Kevin M. Myer > Systems Administrator > Lancaster-Lebanon Intermediate Unit 13 > (717)-560-6140 Hi Kevin I Want to know if you have tried to run amanda on Mac OS X Beta. If you did please tell me how was it. My question is because I am testing to run amanda on Mac OS X Beta but I found some problems when i tried to compiled it. I used ./configure --with-user= --with-group= --with-updportrange= --with-portrange= Let me know Thanks for your help Sandra
Re: Mac OS X Server problems w/ gzip
On Thu, 9 Nov 2000, Mitch Collinsworth wrote: > Have you tried compress client fast yet or are you still doing client > best? Yes, actually, I had been using client fast for all my backups. Maybe I would do better with client best :) Still, the thing that irks me most about it is not that the backup is slow - its that Apple has made it nigh on impossible to debug anything under Mac OS X Server. If I could just run ktrace on a running backup, I'm sure it would shed some light on the matter. But like I said, its not that big an issue - as long as we have the network bandwidth and tape space and/or can do the compression on the backup server, things will be fine. Kevin -- Kevin M. Myer Systems Administrator Lancaster-Lebanon Intermediate Unit 13 (717)-560-6140
Re: Mac OS X Server problems w/ gzip
> >... gzip is just really, really slow when used with AMANDA under Mac > >OS X Server. Command line issued tar/gzip pipes seem to work reasonably > >fast on the OS X Server. > > Well, if one of these boxes ever drops in my lap (and I have time), > I guess I can take a look at debugging this. Other than that ... John, there is a chance one will drop in my lap sometime soon. If that happens we'll have free reign to use it for testing for probably a few months. I just changed departments this summer and we don't have amanda running here yet, but one of our staff is in the midst of installing it now. Also, Kevin hasn't said if he's tried client fast yet. I know I've seen remarkable differences in speed between best and fast. It would be nice to know what the difference is on these machines. -Mitch
Re: Mac OS X Server problems w/ gzip
On Thu, 9 Nov 2000, Kevin M. Myer wrote: > On Wed, 8 Nov 2000, Chris Karakas wrote: > > > When I first used AMANDA, I used it without compression. Then I upgraded > > the tape drivers (which used an inherend "block" compression, > > transparent to the user), the new ones did not support any inherent > > compression, so I had to use the usual "client" compression. I was > > amazed to see how much longer it took. Where AMANDA used to take 2-3 > > hours to finish, now it took 6-8! > > Thats all fine and good but my AMANDA server backs up 13 servers. 3 run > Solaris, 8 run Linux and 1 runs OS X Server. I can do full backups of all > the servers in less than three hours, with client-side compression, with > the exception of the OS X Server. It takes over 8 hours to compress and > backup 400 Mb of data on that machine (a 400MHz G4 machine with a Gig of > RAM). So its not merely an issue of gzip compression adding time to the > backups. gzip is just really, really slow when used with AMANDA under Mac > OS X Server. Command line issued tar/gzip pipes seem to work reasonably > fast on the OS X Server. > > Its not a big deal - I've moved all compression to the backup server at > this point, but it is an oddity I was hoping to figure out. Have you tried compress client fast yet or are you still doing client best? -Mitch
Re: Mac OS X Server problems w/ gzip
>... gzip is just really, really slow when used with AMANDA under Mac
>OS X Server. Command line issued tar/gzip pipes seem to work reasonably
>fast on the OS X Server.
Well, if one of these boxes ever drops in my lap (and I have time),
I guess I can take a look at debugging this. Other than that ...
>Its not a big deal - I've moved all compression to the backup server at
>this point, but it is an oddity I was hoping to figure out.
You don't have to move all compression to the server, just the MacOS one.
If they all share a common dumptype, create a new one that inherits
and alters:
define dumptype normal {
# This dumptype is used by everything except MacOS
...
}
define dumptype normal-server-compress {
# Used for MacOS where client side compression is very slow
normal
compress server fast
}
Then change disklist to reference the special dumptype for the MacOS
system.
>Kevin
John R. Jackson, Technical Software Specialist, [EMAIL PROTECTED]
Re: Mac OS X Server problems w/ gzip
On Wed, 8 Nov 2000, Chris Karakas wrote: > When I first used AMANDA, I used it without compression. Then I upgraded > the tape drivers (which used an inherend "block" compression, > transparent to the user), the new ones did not support any inherent > compression, so I had to use the usual "client" compression. I was > amazed to see how much longer it took. Where AMANDA used to take 2-3 > hours to finish, now it took 6-8! Thats all fine and good but my AMANDA server backs up 13 servers. 3 run Solaris, 8 run Linux and 1 runs OS X Server. I can do full backups of all the servers in less than three hours, with client-side compression, with the exception of the OS X Server. It takes over 8 hours to compress and backup 400 Mb of data on that machine (a 400MHz G4 machine with a Gig of RAM). So its not merely an issue of gzip compression adding time to the backups. gzip is just really, really slow when used with AMANDA under Mac OS X Server. Command line issued tar/gzip pipes seem to work reasonably fast on the OS X Server. Its not a big deal - I've moved all compression to the backup server at this point, but it is an oddity I was hoping to figure out. Kevin -- Kevin M. Myer Systems Administrator Lancaster-Lebanon Intermediate Unit 13 (717)-560-6140
Re: Mac OS X Server problems w/ gzip
"Kevin M. Myer" wrote: > > Hello, > > Awhile back, I had posted about problems I was having with using AMANDA > with Mac OS X Server. The problems I was seeing related to extremely long > backup times, in excess of 8 hours to backup only 400MB of > data. Apple has disabled ktrace debugging of the kernel so there wasn't > much I could do to figure out where the problem is. However, recently, I > decided to do a set of dumps with compression turned off. It turns out, > thats where the slowdown is occuring. For some reason, the compression > pipe from gzip to tar is extremely slow under Mac OS X Server. When I first used AMANDA, I used it without compression. Then I upgraded the tape drivers (which used an inherend "block" compression, transparent to the user), the new ones did not support any inherent compression, so I had to use the usual "client" compression. I was amazed to see how much longer it took. Where AMANDA used to take 2-3 hours to finish, now it took 6-8! I checked it and it is normal. "gzip -v9" (or whatever "best" compression means) just takes that long, even on other occasions, not just AMANDA backups. I would suspect that the time for a CPU upgrade has arrived (at least on this 486DX-133 I still use here ;-)). -- Regards Chris Karakas Don´t waste your cpu time - crack rc5: http://www.distributed.net
Re: Mac OS X Server problems w/ gzip
> Awhile back, I had posted about problems I was having with using AMANDA > with Mac OS X Server. The problems I was seeing related to extremely long > backup times, in excess of 8 hours to backup only 400MB of > data. Apple has disabled ktrace debugging of the kernel so there wasn't > much I could do to figure out where the problem is. However, recently, I > decided to do a set of dumps with compression turned off. It turns out, > thats where the slowdown is occuring. For some reason, the compression > pipe from gzip to tar is extremely slow under Mac OS X Server. Since Mac > OS X Server is in part based on FreeBSD, I was wondering if anyone has > noticed similar situations with FreeBSD? Also, has anyone tested AMANDA > with Mac OS X Beta and do similar problems exist there? I have no experience yet with OS X but I have seen significant speed differences between compress fast and compress best. If your slowdowns are happening with best, try fast. -Mitch
Mac OS X Server problems w/ gzip
Hello, Awhile back, I had posted about problems I was having with using AMANDA with Mac OS X Server. The problems I was seeing related to extremely long backup times, in excess of 8 hours to backup only 400MB of data. Apple has disabled ktrace debugging of the kernel so there wasn't much I could do to figure out where the problem is. However, recently, I decided to do a set of dumps with compression turned off. It turns out, thats where the slowdown is occuring. For some reason, the compression pipe from gzip to tar is extremely slow under Mac OS X Server. Since Mac OS X Server is in part based on FreeBSD, I was wondering if anyone has noticed similar situations with FreeBSD? Also, has anyone tested AMANDA with Mac OS X Beta and do similar problems exist there? Thanks, Kevin -- Kevin M. Myer Systems Administrator Lancaster-Lebanon Intermediate Unit 13 (717)-560-6140
