Zitat von Geert Stappers <geert.stapp...@vanadgroup.com>: > Op 20120920 om 23:18 schreef Radosław Korzeniewski: >> 2012/9/20 <lst_ho...@kwsoft.de> >> > Zitat von lst_ho...@kwsoft.de: >> > >> > > Hello >> > > >> > > we try to do backups with two jobs in parallel for our Windows >> > > fileserver to get better throughput. Unfortunately both jobs start as >> > > expected, but only one proceed with VSS and saving the other simply >> > > waits for the first to complete. We have set the "max concurrent jobs" >> > > in the storage the director and the client config, so this should not >> > > be a problem. Is this even possible on Windows or are we limited to >> > > one save job? >> > > >> > >> > Not possible at all? >> > No one tested? >> > Or no one cares? > > Another option: > > The original poster's "unacceptable limit" is not a limit to others > or it is a acceptable one.
Sorry if someone feel offended by my post, i'm no native english speaker so it may have sound more unfriendly then intended. Because i found no hint in the documentation that it should not work, i decided to ask if it should work before trying to find a error in the config for what is simply a missing feature. I only started recently with Bacula and what might be obvious for long time users/developers is not that obvious for me. >> > >> > Would be really nice to know if it should be possible to run more than >> > one backup job per machine. >> >> Hello, >> >> You have to ask developers. There are a mutex in the VSS code which limits a >> number of concurrent VSS jobs. I'm not sure why it is there. Is it >> a limitation >> of VSS or Bacula? >> > > FWIW: I would ask it more open, like: > > Hello, > > With the backup of Microsoft Windows servers I have (the feeling) to go > through a bottle neck. > So now I'm trying to create a parallel lane to get more throughput. > > and elaborate it with: >> > > we try to do backups with two jobs in parallel for our Windows >> > > fileserver to get better throughput. ------------- Both jobs start as >> > > expected, but only one proceed with VSS and saving the other simply >> > > waits for the first to complete. We have set the "max concurrent jobs" >> > > in the storage the director and the client config, so this should not >> > > be a problem. > > Then come with smart questions like > > How is "max concurrent jobs" on a winbacula file deamon propagated > into VSS? That would have been the next step, i first want to check if it should work that way at all or if parallel backups of one machine is not possible anyway. > Whatelse beside "max concurrent jobs" is needed for doing parallel backup? > > > My next step would be doing more research on _my_ problem. Even it fails, > it gives other people more time to respond om my message. The good thing > about it, is that it avoids a rude _same day_ "I DEMAND A REPLY!". Strictly speaking it wasn't the same day and as said the core question was "is it supposed to work so i have to dig deeper in or is it known not to work that way". I was under the impression that someone must have been on that road before so a simply "no" as answer would be sufficient. > In the occasion of no reply from the mailing list, > I would come back with the results of my research. > Depending of the outcome I would post either > > I have the feeling that I'm building a second neck on the bottle. > > or > > If I'm asking for a second neck on the bottle, please say so. > > Cheers > Geert Stappers The problem arises from slow backup rates (3 .. 30 MBytes/sec) with using encryption. This especially hurts on the Windows fileserver which has more than one I/O channel and also more than one core. With one FD working, one core is saturated and in case of small files the transfer speed go below 10MBytes/sec. The idea was to start a second FD (thread) using one of the idle cores and working on another filesystem (other I/O channel) on the same machine to get more speed. So if i got it right until here it is not (yet) possible and might have to do with VSS (Windows)? Many Thanks Andreas ------------------------------------------------------------------------------ Got visibility? Most devs has no idea what their production app looks like. Find out how fast your code is with AppDynamics Lite. http://ad.doubleclick.net/clk;262219671;13503038;y? http://info.appdynamics.com/FreeJavaPerformanceDownload.html _______________________________________________ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users
