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> 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 > 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/
