3. Yes, there is certainly some confusion in client/host or host/server naming schemes :-) Actually, I could imagine that the rsync compression could be a reason for writing the custom perl version, which BackupPC use: You just don't uncompress and store the already compressed file... But I doubt this is the case :-)
4. I guess so... It does not seem to be a place to do the compression then... Jan Dne 12.01.2019 v 17:14 Robert Trevellyan napsal(a): > 3. Sorry, I think of the machines being backed up as clients, but > BackupPC does call them hosts. rsync supports compressed transfers but > that's not the scheme used for storage by BackupPC. > > 4. You may be thinking of the tasks that check for unreferenced files > and recalculate the total pool size, which can both be split over > multiple nightly runs. > > Robert Trevellyan > > > On Sat, Jan 12, 2019 at 11:04 AM Jan Stransky > <jan.stransky.c...@gmail.com <mailto:jan.stransky.c...@gmail.com>> wrote: > > Hi Robert, > > 1-2) This is what I would expect, I am currious if there is a way > to gradually compress the files; not all at once. > > 3) By the host, I meant host being backed up. And I am sure, it is > not used for the compression, unless compress option of rsync is > used. But I guess, this is uncompressed and compressed again on > the server side. The think is that Pentium N3700 is not very > efficient worker, however i7, which is backed up is different > story.... > > 4) I think there is an option how big percentage of files is being > checked or so; what about this one? > > Cheers, > > Jan > > Dne 12.01.2019 v 14:55 Robert Trevellyan napsal(a): >> Hi Jan, >> >> I think this is correct, but there are other experts who might >> chime in to correct me. >> >> 1. Migration will not result in compression of existing backups. >> It just allows V4 to consume the V3 pool. >> >> 2. After compression is turned on, newly backed up files will be >> compressed. Existing backups will remain as they were. >> >> 3. Host resources are always used for compression, either because >> BackupPC is doing the work, or because the filesystem does it >> natively. My BackupPC pools are on ZFS with LZ4 compression >> enabled and BackupPC compression disabled. >> >> 4. The closest thing would be using rsync with --ignore-times for >> full backups, which isn't quite the same thing, or having the >> filesystem do it (e.g. ZFS scrub). >> >> Robert Trevellyan >> >> >> On Sat, Jan 12, 2019 at 7:51 AM Jan Stransky >> <jan.stransky.c...@gmail.com >> <mailto:jan.stransky.c...@gmail.com>> wrote: >> >> Hi, >> >> I have few questions related to compression >> >> Currently, I have BackupPC 3 installed on Intel NUC with 4 >> core pentium, >> and since the compression significantly decreased backup >> speeds, I have >> turned it off. I am about to switch to v4, so it might be >> worth to >> reconsider, since the increments are not big, big data are >> already in >> the pool and v4 handles files differently. >> >> 1) If I start the migration with compression on, when would >> it happen? >> Would whole pool be compressed at once? >> >> 2) If the pool is uncompressed, and I turned it on, when will be >> uncompressed files compressed? On full backup, or never unless ti >> changes on the host? >> >> 3) Is there way to compress the files using the host resources? >> >> 4) Is integrity of the compressed file checked any time? >> >> Best regards, >> >> Jan >> >> >> >> _______________________________________________ >> 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 >> <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 > <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/
