> Hi all,
Hello Adam, > I've been using Bacula for a number of years but recently got hold of > an old tape autochanger with an LTO-4 drive, which I would like to use > to have Bacula write to tape instead of my previous disk/file config. > > I think I have everything set up, all the tapes are labelled and Bacula > switches tapes when each one fills up, however after the first tape > started writing at 80MB/sec, the rest of them only write at 60-65MB/sec. > > Listening to the unit the drive stops, rewinds, then starts again quite > a lot, so the drop in write speed appears to be due to shoe-shining. > > I have set up a spool file on my /tmp partition, which is a Linux tmpfs > filesystem (data is stored in RAM), so there should be no speed issue > reading or writing the spool file. Certainly Bacula writes to it at > over 120MB/sec when the file daemon can deliver data fast enough, yet > when despooling the shoe-shining occurs. The machine has no swap file > (and 64GB RAM) so the data is definitely staying in memory the whole > time. For a continuous tape writing with spooling spool size should be at least the same size of the tape. IMHO this is not shoe-shining, but Bacula just stop writing to tape when data is being spooled. Shoe-shining is when you provide a very lower writing stream for the tape and it is unable to fill the tape strip in the first pass. This is not the case. Regards, > Many thanks, > Adam. Regards, -- MSc Heitor Faria CEO Bacula LATAM mobile1: + 1 909 655-8971 mobile2: + 55 61 98268-4220 Brasilia - Miami - New York www.bacula.com.br _______________________________________________ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users