> -----Original Message----- > From: Les Mikesell [mailto:lesmikes...@gmail.com] > Sent: Tuesday, February 05, 2013 5:24 PM > To: General list for user discussion, questions and support > Subject: Re: [BackupPC-users] (somewhat solved) Backing up many small > files > > > A quick additional note, the drives on the client seem to be pretty fast, > > even > > compared to the raid0 array... > > > > user@BPC-client ~/ [0]# hdparm -tT /dev/sd[ab] > > > > /dev/sda: > > Timing cached reads: 10832 MB in 2.00 seconds = 5416.82 MB/sec > > Timing buffered disk reads: 208 MB in 3.02 seconds = 68.77 MB/sec > > > > /dev/sdb: > > Timing cached reads: 11108 MB in 2.00 seconds = 5554.84 MB/sec > > Timing buffered disk reads: 254 MB in 3.00 seconds = 84.54 MB/sec > > You are testing sustained transfer times there. The killer with small > files is the seek time while the disk head bounces around reading > little bits of directory and inode data. And once you get started, > the server has to do approximately the same to check for matches - > possibly with other backups running.
I realized that afterwards. I'll be looking for some kind of random test instead. -- /Sorin
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