I can see two implementation possibilities for improving performance:
- Use HMAC. This effectively makes the backup forgeable by any
entity who can read the session keys, but this may not be an issue in
your environment.
- Batch signatures, signing multiple files at once. This is very
difficult to achieve in Bacula, as its expected that all components of
a file streams will be stored in neighboring streams (ie, next to each
other in the backup stream).
There's an additional option if you don't require client-side
encryption -- implement encryption in the storage daemon, using batched
multi-block signing. I wrote up most of the work necessary to do that
here:
http://www.mail-archive.com/bacula-users AT lists.sourceforge DOT net/msg28860.html
Thank you for your response, I tried to implement those solutions you mentioned but I failed, this may have to do with my lack in experince in programming :)
Of course, it's also possible to turn PKI Signatures off as a workaround, but I wouldn't recommend it.
I tried this but it did not work, at least there was no difference in the average rate and time.
With "PKI Signatures = Yes":
Elapsed time: 14 mins 48 secs
Priority: 10
FD Files Written: 58,430
SD Files Written: 58,430
FD Bytes Written: 4,244,509,936 (4.244 GB)
SD Bytes Written: 4,268,099,872 (4.268 GB)
Rate: 4779.9 KB/s
Software Compression: None
VSS: no
Encryption: yes
With "PKI Signatures = No":
Elapsed time: 14 mins 50 secs
Priority: 10
FD Files Written: 58,444
SD Files Written: 58,444
FD Bytes Written: 4,250,146,944 (4.250 GB)
SD Bytes Written: 4,273,742,815 (4.273 GB)
Rate: 4775.4 KB/s
Software Compression: None
VSS: no
Encryption: yes
Maybe there is another solution or someone who can help me to implement those which Landon mentioned.
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