Timothy J Massey <tmassey <at> obscorp.com> writes: > Encryption is *very* CPU-intensive. For example, > from what I've seen (mostly with scp), 1MB/s is a *good* amount of data > transfer while using encryption! That's great for your average home-drive
I ran some bonnie++ benchmarks on the filesystem in question (backed by USB disk and compression). It showed 25MB/s block write, 4.5MB/s block rewrite, and 6MB/s block read. So by even a pessimistic benchmark that is 4.5 times as fast as 1MB/s ;-) > or flash drive type storage, but BackupPC lives and dies by throughput... > Are you also using compression? Good luck. Compression > is almost as CPU intensive as encryption! (I forgot to note in my > stats previously that I do *not* use compression on BackupPC: I want my > backups as simple as possible.) Yes, in backuppc (not any kind of filesystem-level compression), but when most of the dataset doesn't change in a night -- is it really relevant? > I think you might want to start a *LOT* simpler. Get > rid of a lot of the extra layers, even if temporarily. Start with > a simple server: 1 SATA drive, 1GB RAM, 1GHz processor and 1 Gb interface. > See how that performs--I think you will be pleasantly surprised. Well, I did run this on a system with better specs than that (SATA disks in a RAID, lots of RAM, faster processor). It worked great with tar but bogged down terribly on 25GB files with rsync (see the other thread about that). I believe the problems I'm seeing now, at least for the incrementals, are unrelated. -- John ------------------------------------------------------------------------------ Free Software Download: Index, Search & Analyze Logs and other IT data in Real-Time with Splunk. Collect, index and harness all the fast moving IT data generated by your applications, servers and devices whether physical, virtual or in the cloud. Deliver compliance at lower cost and gain new business insights. http://p.sf.net/sfu/splunk-dev2dev _______________________________________________ BackupPC-users mailing list [email protected] List: https://lists.sourceforge.net/lists/listinfo/backuppc-users Wiki: http://backuppc.wiki.sourceforge.net Project: http://backuppc.sourceforge.net/
