Re: [Bacula-users] LTO speed optimisation

2014-12-17 Thread Roberts, Ben
tapes. Regards, Ben Roberts > -Original Message- > From: Alan Brown [mailto:a.br...@ucl.ac.uk] > Sent: 17 December 2014 13:50 > To: Roberts, Ben; Cejka Rudolf; Bryn Hughes; Radosław Korzeniewski; Kern > Sibbald > Cc: bacula-users@lists.sourceforge.net > Subjec

Re: [Bacula-users] LTO speed optimisation

2014-11-06 Thread Kern Sibbald
Hello, I recommend that you use caution when applying information from a new fork with relatively young programmers.  Bareos recommends setting the block size to 1M.  However, myself, and confirmed by Quantum for LTO-4 tapes (may change with LTO-5, 6) is th

Re: [Bacula-users] LTO speed optimisation

2014-11-06 Thread Radosław Korzeniewski
Hello, 2014-11-05 15:37 GMT+01:00 Bryn Hughes : > In particular pay attention to the '%util' > It is valid _only_ for single spindle direct attached disk. For others you shouldn't count on it. best regards -- Radosław Korzeniewski rados...@korzeniewski.net ---

Re: [Bacula-users] LTO speed optimisation

2014-11-06 Thread Cejka Rudolf
Bryn Hughes wrote (2014/11/05): > Finally there are some OS-level settings for the 'st' driver (I'm > assuming you are on Linux). With my LTO3 drives I need to add this to > the kernel command line: Hi, Solaris 11. > On 2014-11-05 03:48 AM, Roberts, Ben wrote: > > Hi all, > > I'd like to try a

Re: [Bacula-users] LTO speed optimisation

2014-11-05 Thread Bryn Hughes
Hi Ben, To start with I would watch the server using iostat and top to make sure you aren't running out of CPU and that you really aren't maxing out your disks during your backup. In particular pay attention to the '%util' - I like to run 'iostat -kx 2' which will show the stats every 2 secon

[Bacula-users] LTO speed optimisation

2014-11-05 Thread Roberts, Ben
Hi all, I'd like to try and make some speed improvements to my Bacula setup (5.2.13, Solaris11). I have data (and attribute) spooling enabled using a pool of 46x 1TB directly-attached SAS disks dedicated to this purpose. Data is being despooled to 2x directly-attached SAS LTO6 drives at around