On Thu, Jan 14, 2010 at 06:18:33PM +0000, Chris G wrote: > I'm running rdiff-backup on a Western Digital My Book World Edition > II, it's a little NAS server that runs linux and has ssh login > available. > > The rdiff-backup is running from one of the NAS server's drives to the > other drive, i.e. it's not being run from another system to (or from) > the NAS and thus is not limited by network bandwidth. > > I'm backing up two large[ish] directories, one is around 164Gb, the > other is about 35Gb. > > The 35Gb one takes about 7 minutes to run, which is fine, but the > 165Gb one takes 4 hours and 5 minutes. Presumably there's some sort > of resource limitation which the bigger backup is hitting and hence > running slower. > > Is there anything I can do to improve performance? My first guess > would be that rdiff-backup is running out of 'real' memory and > swapping which is slowing things. > > It has 126828 kB of memory, more than I thought, that's 128Mb. > > The processor is an ARM926EJ-S, 183 BogoMIPS. > ... and here are the rdiff-backup session_statistics files:-
StartTime 1263436518.00 (Thu Jan 14 02:35:18 2010) EndTime 1263451841.07 (Thu Jan 14 06:50:41 2010) ElapsedTime 15323.07 (4 hours 15 minutes 23.07 seconds) SourceFiles 253324 SourceFileSize 167143773023 (156 GB) MirrorFiles 253050 MirrorFileSize 167116487371 (156 GB) NewFiles 274 NewFileSize 23594577 (22.5 MB) DeletedFiles 0 DeletedFileSize 0 (0 bytes) ChangedFiles 431 ChangedSourceSize 18543551628 (17.3 GB) ChangedMirrorSize 18539860553 (17.3 GB) IncrementFiles 706 IncrementFileSize 90764595 (86.6 MB) TotalDestinationSizeChange 118050247 (113 MB) Errors 0 StartTime 1263451844.00 (Thu Jan 14 06:50:44 2010) EndTime 1263452264.06 (Thu Jan 14 06:57:44 2010) ElapsedTime 420.06 (7 minutes) SourceFiles 25405 SourceFileSize 35810108114 (33.4 GB) MirrorFiles 25405 MirrorFileSize 35810108114 (33.4 GB) NewFiles 0 NewFileSize 0 (0 bytes) DeletedFiles 0 DeletedFileSize 0 (0 bytes) ChangedFiles 0 ChangedSourceSize 0 (0 bytes) ChangedMirrorSize 0 (0 bytes) IncrementFiles 0 IncrementFileSize 0 (0 bytes) TotalDestinationSizeChange 0 (0 bytes) Errors 0 Hmmm, there's something funny going on here! There should be some changed files in that second (33Gb) backup, I'll go and investigate. -- Chris Green _______________________________________________ rdiff-backup-users mailing list at rdiff-backup-users@nongnu.org http://lists.nongnu.org/mailman/listinfo/rdiff-backup-users Wiki URL: http://rdiff-backup.solutionsfirst.com.au/index.php/RdiffBackupWiki