On Monday 26 November 2018 15:14:51 Nathan Stratton Treadway wrote: > On Mon, Nov 26, 2018 at 14:15:41 -0500, Chris Nighswonger wrote: > > That makes more sense. I've set it to 10 and inparallel to 2 and > > we'll see how it goes tonight. > > > > On Mon, Nov 26, 2018 at 2:01 PM Cuttler, Brian R (HEALTH) > > > > <brian.cutt...@health.ny.gov> wrote: > > > I believe maxdumps is max concurrent dumps across all clients. > > > > > > You might have 10 clients each with an inparallel of 2, giving 20 > > > possible concurrent dumps, but because of server limitations you > > > might set maxdumps to something between 2 and 20. > > Actually, it is the other way around: when you kick off amdump, the > driver retrieves the "inparallel" configuration option and then starts > up that number of dumper subprocesses -- so "inparallel" controls the > total number of dumpers available for the whole run. > > In contrast, the amanda.conf man page section on maxdumps says: "The > maximum number of backups from a single host that Amanda will attempt > to run in parallel." So that controls how many (out of the > "inparallel" total dumpers available) might simultaneously run on one > host at the same time. > > (Maxdumps defaults to 1 to avoid two dumpers on the same client > competing with each other for disk I/O [or worse, thrashing the disk > heads by interweaving reads from different places on the device], CPU > [e.g. for compression], and/or network bandwidth. This seems likely > to be a reasonable default, though I guess if you had multiple > physical disk devices each of which was relatively slow compared to > CPU and network bandwidth then it would make sense to run more than > one dump at a time. But I'd do careful testing to make sure that's > not actually slowing down the overall dump.) > > > Nathan
AIUI, this is where the "spindle" number in your DLE comes into play, and unless that particular client has more than 1 active disk, it should remain at 1. Now if like some, you have /home on a separate drive from the root filesystem, you may find it helpfull to put a 2 in those DLEs that are on that clients 2nd drive, and it should then run two dumpers in independent dumps on THAT client. > ---------------------------------------------------------------------- >------ Nathan Stratton Treadway - natha...@ontko.com - Mid-Atlantic > region Ray Ontko & Co. - Software consulting services - > http://www.ontko.com/ GPG Key: > http://www.ontko.com/~nathanst/gpg_key.txt ID: 1023D/ECFB6239 Key > fingerprint = 6AD8 485E 20B9 5C71 231C 0C32 15F3 ADCD ECFB 6239 Copyright 2018 by Maurice E. Heskett -- Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene>
