> On 01/23/2015 12:22 PM, Radosław Korzeniewski wrote: > > > If you are using a vchanger then I guess it is a disk only backup, so why > > do you spool data? It is not required but making you backup slow down at > > least 2 times then standard job. > > It's 2 times slower if your spool/despool is strictly sequential and the > same size pipes go in and out. If you have 10 clients spooling over a > 1Gb/s link, that's roughly 10MB/s/client. Iostat clocks ext4/basic sata > drives at around 110MB/s write speed, so despooling is 10 times faster. > If only the clients could keep the pipe full, it could be ~10 times > faster than the "standard" job. In a purely hypothetical perfectly > spherical world of uniform density, obviously, but still: no, 2x slow > down is not how it really works.
Even though, IMHO, spooling disks backup is just "muda" (Japanese Term): http://en.wikipedia.org/wiki/Muda_(Japanese_term) > Dimitri Maziuk > Programmer/sysadmin > BioMagResBank, UW-Madison -- http://www.bmrb.wisc.edu Regards, ============================================================================== Heitor Medrado de Faria - LPIC-III | ITIL-F Jan. 26 - Fev. 06 - Novo Treinamento Telepresencial Bacula: http://www.bacula.com.br/?p=2174 61 8268-4220 Site: www.bacula.com.br | Facebook: heitor.faria | Gtalk: heitorfa...@gmail.com =============================================================================== ------------------------------------------------------------------------------ New Year. New Location. New Benefits. New Data Center in Ashburn, VA. GigeNET is offering a free month of service with a new server in Ashburn. Choose from 2 high performing configs, both with 100TB of bandwidth. Higher redundancy.Lower latency.Increased capacity.Completely compliant. http://p.sf.net/sfu/gigenet _______________________________________________ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users
