Hmmm I am not so sure about that.. because it appears the time it takes compress files also slows down the transfer of them. I was getting like 6Mb/s from a server on the same switch as the backup machine. One CPU out of 16 was pegged at a 100% under compression. Surely it would be trivial to replace gzip with pigz and bzip2 with pbzip2? On systems with multiple cores you would see an immediate benefit and single core instances would be unaffected.
Either way I was surprised to see one CPU pegged for so long and feel that not optimising for resources is a bug in some way? Thanks. On 01/10/2019 04:58, Craig Barratt via BackupPC-users wrote: > Each rsync backup has two processes on the backup server, but only one > will be doing compression. So, yes, compression for a single backup > is single-threaded (as rsync is). > > However, the backup server usually runs multiple backups > (configurable), and, in the steady state, the amount of compression > required isn't very large: only new files not already in the pool need > to be compressed. It's not likely compression is a bottleneck. > > Craig > > On Mon, Sep 30, 2019 at 5:33 PM <p2k-...@roosoft.ltd.uk > <mailto:p2k-...@roosoft.ltd.uk>> wrote: > > Hey guys, > > > Is there such a setting or is backuppc genuinely single threaded > when it > comes to compression? I ask because seems a little silly these > days when > pretty much all CPUs are multicore and all server are multicore > and multcpu? > > > So is there a setting I am missing? I scanned the documentation and it > does not really talk about how to improver compression speeds. That > seems to be a bottle next to me? > > > Thanks. > > > -- > == > > > Don Alexander. > > > > > _______________________________________________ > BackupPC-users mailing list > BackupPC-users@lists.sourceforge.net > <mailto:BackupPC-users@lists.sourceforge.net> > List: https://lists.sourceforge.net/lists/listinfo/backuppc-users > Wiki: http://backuppc.wiki.sourceforge.net > Project: http://backuppc.sourceforge.net/ > > > > _______________________________________________ > BackupPC-users mailing list > BackupPC-users@lists.sourceforge.net > List: https://lists.sourceforge.net/lists/listinfo/backuppc-users > Wiki: http://backuppc.wiki.sourceforge.net > Project: http://backuppc.sourceforge.net/ _______________________________________________ BackupPC-users mailing list BackupPC-users@lists.sourceforge.net List: https://lists.sourceforge.net/lists/listinfo/backuppc-users Wiki: http://backuppc.wiki.sourceforge.net Project: http://backuppc.sourceforge.net/
