Hello,
I have long ago worked out the basic design of Job migration between
different SDs,
but I haven't written it down, because no one has volunteered to do the
project, so
I have been planning to do it myself (if I have to do it, it will be as
a Bacula Enterprise
feature obviously). The design is basically:
1. Ensure Dir understands that two SDs are involved (possible need for
additional directives).
2. Dir initiates connection with each of the SD's, one of which is the
Reading SD (rSD) and one of which is the Writing SD (wSD).
3. Dir transmits the coordinates of the wSD to the rSD as
well as the necessary security token.
4. The rSD connects to the wSD as if it were a FD and uses
the FD protocol (or possibly a simplified version) to transmit
the data from the rSD to the wSD. Note, the wSD doesn't
need to know that the rSD is an SD -- it can simply think
it is an FD.
The rest of the backup proceeds as a normal back.
Is there someone who is interested to implement the project?
Best regards,
Kern
On 08/29/2011 09:57 AM, Radosław Korzeniewski wrote:
Hello,
My thoughts about it below:
2011/8/25 Allan Garcia <allan.gar...@gmail.com
<mailto:allan.gar...@gmail.com>>
(...)
MY INITIAL BRAINSTORM
1. the dird have to contact the origin *sd* and command the
migration (like it's done now)
2. the origin *sd* detects if the destination *sd* it's himself or
the other *sd*
I think Director should communicate origin SD that destination is
remote device on the other SD and supply required connection info.
3. if the origin *sd* detects other destination, it respond
informing that to the dird
4. the dird have to handle the origin *sd* response informing the
destination *sd*
If you change #2, that above steps won't be required.
5. the dird commands the destination *sd* to wait the origin *sd*
connection
6. the dird commands waits the destination *sd* to confirm
7. the dird commands origin *sd* to send data to destination *sd*
8. when it's done the job are marked as sucess, otherwise fail.
Waiting for any comments...
You have to design a protocol used for SD to SD communication
including TLS/SSL encryption layer.
Best regards
--
Radosław Korzeniewski
rados...@korzeniewski.net <mailto:rados...@korzeniewski.net>
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EMC VNX: the world's simplest storage, starting under $10K
The only unified storage solution that offers unified management
Up to 160% more powerful than alternatives and 25% more efficient.
Guaranteed. http://p.sf.net/sfu/emc-vnx-dev2dev
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