EHLO ping? No response over time...
I know that 7zip has "ultra compression" profile algorithm, which eats up all your CPU, but today, there are multi-core systems - of which 7zip is able to take advantage - it is muti-threaded, and it should be fine to set configuration option (command-line option) to chose from 1. gzip (as now it is this way), or 2. bz2, or 3. 7zip and in case of 7zip the "depth" of compression + how many threads (cpu cores) the 7zip should use and of what niceness. It is always up to the user, whether they want simple and fast compression, or deep compression && don't mind about excessive CPU load - in docs, they always can be warned... it is the matter of priorities and backup operator's preference and decision... best, VooDooMan . On 11. 8. 2010 20:16, Marian 'VooDooMan' Meravy wrote: > EHLO > > Greetings, > > devels: rdiff-backup stores data by using industry standard "gzip". But > bz2 has better compression. Or even usage of 7zip, which is not > "industry standard" but everyone is using it, so it will become industry > standard sooner or later, and it has more aggressive compression than > all other zip algorithms (it has even multi-thread support, so SMP > kernels and multi-core systems can use advantage of it). PS: 7zip AFAIK > has library installed besides command-line tool `mc` - midnight > commander is using it) -> I'm not sure about .so library, but I'm really > sure that bz2 package _HAS_ library, I mean .so on unices, on windows, > there should be .dll as well). > > would it be possible to implement bz2, or even 7zip ? > > on windows installation (e.g. cygwin) can place dependency for > compression libraries... > > Best, > VooDooMan > . > > On 11. 8. 2010 20:00, Steven Willoughby wrote: >> On 08/10/2010 04:16 PM, Robinson, Eric wrote: >>> >>> "It's quiet." >>> >>> "Yeah, too quiet. Gives me the willies." >>> >>> "Me, too." >>> >>> -- >>> Eric Robinson >>> >>> >>> >>> -----Original Message----- >>> From: [email protected] >>> [mailto:[email protected]] >>> On Behalf Of Robinson, Eric >>> Sent: Saturday, August 07, 2010 8:50 AM >>> To: [email protected] >>> Subject: [rdiff-backup-users] Error "Unable to compare" BUT THEN "No >>> changesfound. Directory matches." What? >>> >>> I've been using rdiff-backup for a while, but today was the first time I >>> tried using the --compare-hash directive. >>> >>> First I get tons of these messages... >>> >>> Warning: Metadata file has no digest for<file>, unable to >>> compare. >>> >>> That's scary enough by itself. But then at the end it says... >>> >>> No changes found. Directory matches archive data. >>> >>> So if it can't compare, why would it say the directory matches? >>> >> >> I have been running rdiff-backup for a long time with the --verify >> option which does something similar with no issues. The --compare-hash >> option also seems to be working perfectly for me. Adding -v6 to your >> command might be enlightening. >> >>> And what is the problem with the hash in the first place? >>> >> >> The hash should be stored in >> $backup_dir/rdiff-backup-data/mirror_metadata.$date. Try looking at the >> mirror_metadata snapshot previous to the current one (you should be able >> to open it with zless or zcat). IIRC older versions of rdiff-backup >> (like 1.0) didn't store this hash, so perhaps it is missing. If that >> was the case then that would explain the warnings and the "No changes >> found." is probably a bug since it didn't find any files that didn't >> match (since all of them were skipped.) >> >> It might work to use the --compare-full option if you haven't been >> storing hashes. >> >> Steven >> >> _______________________________________________ >> rdiff-backup-users mailing list at [email protected] >> http://lists.nongnu.org/mailman/listinfo/rdiff-backup-users >> Wiki URL: >> http://rdiff-backup.solutionsfirst.com.au/index.php/RdiffBackupWiki >> >> >> >> _______________________________________________ >> rdiff-backup-users mailing list at [email protected] >> http://lists.nongnu.org/mailman/listinfo/rdiff-backup-users >> Wiki URL: http://rdiff-backup.solutionsfirst.com.au/index.php/RdiffBackupWiki
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