On Thu, Jul 22, 2010 at 4:04 AM, Dominik Schips <[email protected]> wrote: > With normal configuration the 500 GB full backup to tape took about > 10-11 hours. > > With the split tape config it took about 16 hours to backup 116 GB and > amanda ist still running to backup the other data.
When doing a split write without holding disk, Amanda must cache all of the data it writes. That additional write can be time-consuming! Also, when not using holding disk, your write speed is constrained by the speed of the process actually dumping your filesystem (probably gnutar?), which for filesystems with a lot of small files can be very slow. > Any advice or solution how to debug the problem (correct) and get normal > write performance with split tape dumps config? * Add holding disk * Use a newer version of Amanda * Split in memory or use a faster disk for your split_diskbuffer Dustin -- Open Source Storage Engineer http://www.zmanda.com
