Baptiste Malguy schrieb: > Hello, > > I wish I could get more precise details for my case. Let's consider > backup are only made on some disks. > > In bacula-dir.conf, in Job resources, we may set Spool Data attribute to > yes. From the online doc, you can read: "This option should not be used > if you are writing to a disk file". > > I definitly understand this advice. Why spool on disk, while the final > storage is on a disk. > > However, I still want to run multiple Jobs in parallel AND avoid > interleaved backup data. > > Furthermore, when I had to restore some small (< 100kb) files from a > disk volume > 50GB, I had to wait for more than 20 minutes. I don't > understand why it was so long. > > Here are my questions: > > 1 - Is it just the OS that takes so long to set its index to the content > of the disk volume (file) or is it Bacula that treats a disk volume as a > cartridge, with sequential access instead of random access ?
It is bacula (at the moment). As you can read in the release notes, random access to disk media is disabled due to some error. So bacula has to read all the backup devices sequential. See http://www.bacula.org/?page=news "- Disk seeking during restores does not yet work correctly in all cases, so it is turned off." > > 2 - Based on the fact Bacula does not use random access to disk volumes, > what's the best deal between spooling data to avoid interleaved backups > data and havin interleaved backups data on disk volumes ? I used disk devices AND spooling for a long time now (until my disk became too small). Works as you want to. > > 3 - By the way, what do you think of havin a single ~ 60GB disk volume > or several smaller 5-10GB volumes ? Does anyone has some background > about it ? There is no preference -- if bacula would use random access on disk devices. But as all backup volumes are read sequentially each volume should be "small". I used 2GB. -- Regards Christoph ________________________________________________________________________ Christoph Litauer [EMAIL PROTECTED] Uni Koblenz, Computing Center, http://www.uni-koblenz.de/~litauer Postfach 201602, 56016 Koblenz Fon: +49 261 287-1311, Fax: -100 1311 PGP-Fingerprint: F39C E314 2650 650D 8092 9514 3A56 FBD8 79E3 27B2 _______________________________________________ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users
