Problem is not really just tape I/O speeds but the ability to get data
to it. I.e. the SD is running at about 50% cpu overhead right now
(single core) so it could possible handle (2) LTO4 drives assuming a new
SD is not spawned off per drive?
I don't really need 'rait' itself as that would double the probability
of errors with pure bit striping. Was thinking more of one file to
each or group of files so that files are intact on each tape (so if you
loose a tape you're not loosing n*#drives worth of files, just the
single tape's worth of files.
On 2011-06-28 10:01, Josh Fisher wrote:
On 6/27/2011 8:43 PM, Steve Costaras wrote:
....
- How to stream a single job to multiple tape drives. Couldn't
figure this out so that only one tape drive is being used.
There are hardware RAIT controllers available from Ultera
(http://www.ultera.com/tapesolutions.htm). A RAIT level 0 array would
allow a "volume" to be a group of two tapes with the data striped across
the two tapes, essentially doubling read/write throughput, just like
RAID-0. But to the OS, and Bacula, the RAIT-0 array looks like a single
device.
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------------------------------------------------------------------------------
All of the data generated in your IT infrastructure is seriously valuable.
Why? It contains a definitive record of application performance, security
threats, fraudulent activity, and more. Splunk takes this data and makes
sense of it. IT sense. And common sense.
http://p.sf.net/sfu/splunk-d2d-c2
_______________________________________________
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Bacula-users@lists.sourceforge.net
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