On 8/22/2017 7:13 PM, Dimitri Maziuk wrote:
On 08/22/2017 05:07 PM, Dan Langille wrote:
On Aug 22, 2017, at 11:01 AM, Dimitri Maziuk <dmaz...@bmrb.wisc.edu> wrote:
However if you want to backup to removable disks and put them on the shelf when
full, that's where things get less than perfect fast.
Is this a common use case? I'm not challenging your approach. I am seeking
knowledge about how Bacula gets used.
I don't know but there is RDX so there's gotta be some demand.
On the flip side, we went from AIT to HDD and never even touched LTO. I
mean, they only guarantee backwards compatibility to 2 generations and
have version creep worse than iPhones. Who in their right mind would use
LTO for their long-term storage, and we have plenty of hard drives
laying around.
This is why I wrote vchanger in the first place. I do not know how many
use it. It averages around 70 downloads per month.
I tend to use portable 2.5 inch USB 3 drives, as opposed to SAS/SATA,
for a number of reasons. Portable drives are designed to be moved around
and are more durable and shock resistant/ The USB connector is designed
for repetitive use, whereas hot-swap bays are not. I can see why the
SAS/SATA might be chosen for speed, although the USB 3 drives are fast
enough (around 100 MB/s) for the small businesses that I am involved
with that have < 50 jobs per day.
I looked into RDX, but do not really see the advantage over USB portable
drives. Perhaps I am missing something, like extended shelf life, etc.,
but they are quite expensive.
As for writing the same job to two disks simultaneously, I don't think
that will be very easy to accomplish. It would, I believe, require a new
Device type driver in Bacula that atomically reserves two Device
resources at a time. Why not use Copy jobs? Or pair the removable drives
into RAID1 arrays?
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