Re: [Bacula-users] Bacula Linux and the LTO-4 tape speed
2012-08-21 07:29:51
Zitat von Alan Brown <ajb2 AT mssl.ucl.ac DOT uk>:
> On 21/08/12 08:37, lst_hoe02 AT kwsoft DOT de wrote:
>> Some short tests with the "Maximum Block Size" set, show transfer
>> speed to the LTO-4 of 87MBytes/sec with 256K and 98MBytes/sec with
>> 1M with Bacula encrypted data, so with this we are reaching the
>> theoretical uncompressed speed of the LTO-4 device by ~20%. It
>> would be really helpful if there is some developer to say if there
>> is any downside of large block sizes?
>
> I'm not a dev, however I use 2Mb block size (this is the largest
> bacula currently supports)
>
> The only downside is that you _must_ mark all active tapes as "used"
> before changing block size.
>
> Bacula will be able to read the old tapes, but it cannot handle
> maximum block size changing midway through a tape.
So i still wonder why the manual recommend not to change this value?
The problem of not mixing the blocksize is obvious so if there is not
other downside one should choose a larger value with any recent tape
drive, no?
Regards
Andreas
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- [Bacula-users] Bacula Linux and the LTO-4 tape speed, lst_hoe02
- Re: [Bacula-users] Bacula Linux and the LTO-4 tape speed, Nils Juergens
- Re: [Bacula-users] Bacula Linux and the LTO-4 tape speed, lst_hoe02
- Re: [Bacula-users] Bacula Linux and the LTO-4 tape speed, lst_hoe02
- Re: [Bacula-users] Bacula Linux and the LTO-4 tape speed, Alan Brown
- Re: [Bacula-users] Bacula Linux and the LTO-4 tape speed,
lst_hoe02 <=
- Re: [Bacula-users] Bacula Linux and the LTO-4 tape speed, Alan Brown
- Re: [Bacula-users] Bacula Linux and the LTO-4 tape speed, lst_hoe02
- Re: [Bacula-users] Bacula Linux and the LTO-4 tape speed, Alan Brown
- Re: [Bacula-users] Bacula Linux and the LTO-4 tape speed, lst_hoe02
- Re: [Bacula-users] Bacula Linux and the LTO-4 tape speed, Sven Tegethoff
- Re: [Bacula-users] Bacula Linux and the LTO-4 tape speed, lst_hoe02
- Re: [Bacula-users] Bacula Linux and the LTO-4 tape speed, Alan Brown
- Re: [Bacula-users] Bacula Linux and the LTO-4 tape speed, lst_hoe02
- Re: [Bacula-users] Bacula Linux and the LTO-4 tape speed, Dan Langille
- Re: [Bacula-users] Bacula Linux and the LTO-4 tape speed, Alan Brown
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