On 05/03/12 21:37, Alan Brown wrote:
> On 05/03/12 19:51, Alex Crow wrote:
>
>> Thanks Alan,
>>
>> I am specifically addressing the encryption support within Bacula:
>>
>> http://www.bacula.org/en/dev-manual/main/main/Data_Encryption.html
> Openssl compresses _if_ compiled with zlib (it usually is)
>
> It's not hard to test, write to a file instead of tape media and compare
> size vs a tarball.
>
> If you are using a LTO device with built-in encryption then it's much
> faster as there is a dedicated engine for the task (LTO encryption is
> posrtable across drives as long as the key is retained)
>
> On that basis I'd only use bacula encryption for disk-based backups or
> on tape devices without builtin encyption.
>
>
>

Alan,

We tried removing the compression on some jobs, and we got a great speed 
boost. However, the SSL compression was either absent or minimal, even 
though OpenSSL libs are compiled with zlib:

[root@backup ~]# ldd /usr/lib/libssl3.so
         linux-gate.so.1 =>  (0xffffe000)
         libnss3.so => /usr/lib/libnss3.so (0xf7e6b000)
         libnssutil3.so => /usr/lib/libnssutil3.so (0xf7e52000)
         libplc4.so => /usr/lib/libplc4.so (0xf7e4e000)
         libplds4.so => /usr/lib/libplds4.so (0xf7e4a000)
         libnspr4.so => /usr/lib/libnspr4.so (0xf7e10000)
         libpthread.so.0 => /lib/libpthread.so.0 (0xf7df7000)
         libdl.so.2 => /lib/libdl.so.2 (0xf7df2000)
         libc.so.6 => /lib/libc.so.6 (0xf7c99000)
         libz.so.1 => /lib/libz.so.1 (0xf7c86000)
         /lib/ld-linux.so.2 (0x00a5e000)
[root@backup ~]#


Any ideas why compression in OpenSSL does not seem to be working?

Thanks

Alex

-- 
This message is intended only for the addressee and may contain
confidential information.  Unless you are that person, you may not
disclose its contents or use it in any way and are requested to delete
the message along with any attachments and notify us immediately.

"Transact" is operated by Integrated Financial Arrangements plc
Domain House, 5-7 Singer Street, London  EC2A 4BQ
Tel: (020) 7608 4900 Fax: (020) 7608 5300
(Registered office: as above; Registered in England and Wales under number: 
3727592)
Authorised and regulated by the Financial Services Authority (entered on the 
FSA Register; number: 190856)


------------------------------------------------------------------------------
This SF email is sponsosred by:
Try Windows Azure free for 90 days Click Here 
http://p.sf.net/sfu/sfd2d-msazure
_______________________________________________
Bacula-users mailing list
Bacula-users AT lists.sourceforge DOT net
https://lists.sourceforge.net/lists/listinfo/bacula-users