Well compiling with -O3 does not seem to have had any increase in throughput for me. :( I'll be moving back to the recommended -O2 after these jobs finish.
Brian- On 11/9/2011 8:23 AM, Cejka Rudolf wrote: > Marcio Merlone wrote (2011/11/09): >> Em 09-11-2011 09:26, Cejka Rudolf escreveu: >>> Cejka Rudolf wrote (2011/11/09): >>>> does anybody have any idea, why after upgrade from Bacula 2.4.3 to >>>> 5.0.3, >>>> tape write speed dropped down from about 70-120 MB/s (LTO-3 tape limits) >>>> to just 60-70 MB/s? I think that I have seen somewhere, that something >>>> (signatures?) has been moved from clients or director to storage daemon, >>>> but could not find it anymore. Or could be the problem somewhere else? >>> Oops, I'm sorry, I forgot to add -O3. After returning -O3, I can >>> see again speeds over 100 MB/s. >> Please enlighten me (us?): Where did you add -03 to improve the speed? I >> have an LTO-4 drive and get no more than 50~60 MB/s! > Hello, before compilation, instead of > > ./configure ... > > try to use > > CFLAGS=-O3 ./configure ... > > and then see your tape drive more happy ;o) > If there are no bugs caused by -O3... > > If Bacula behavior did not change since 2.4.3, the main limiting > factor to achieve higher throughput on LTO tapes, is in CRC32 > computations performed between disk spool reads and tape writes. > ------------------------------------------------------------------------------ RSA(R) Conference 2012 Save $700 by Nov 18 Register now http://p.sf.net/sfu/rsa-sfdev2dev1 _______________________________________________ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users
