I am just running my first ``real'' backup job. It consists of backing up roughly 300GB of data via a 75GB spool partition to a DLT VS80 drive. While the process generally works as expected, I am somewhat disappointed by the performance: According to the `status all' statistics, Bacula 1.36.3 achieves roughly 1.5MB/s, and is shoe-shining the tape during despooling quite a bit. Note that the drive itself is rated for 3 MB/s, a speed it does indeed achieve, e.g., when using tar with some double buffering (to compensate for large numbers of small files). I had hoped that Bacula's spooling mechanism would actually manage to keep the tape streaming.
My current setup has all daemons running on the same machine: An Athlon XP 1700+ CPU, 512 MB RAM, Adaptec 2400 IDE RAID-5 with 4x300GB disks and 128MB of on-board cache, and a Benchmark DLT VS80 drive. The spool disk is a dedicated 80GB IDE disk holding only the spool data. I'd be grateful for any help diagnosing this slow-down. If you need further info, please let me know. Andreas Koch
pgpj11tkXZ1oF.pgp
Description: PGP signature
