Backup Central

I'd like to purchase an autoloader to run with bacula. I need to do up
to 2tb a night and I'd like to look at the models that work best with
this software. Any offhand recommendations on hardware/tape format?
Thanks!
Paul

Hi Paul!

I.m.h.o. DELL PowerVault 124T-DLT provides a _lot_ bang for the bucks. =
6.4 TB native storage on 16 tapes for approx. =E2=82=AC4100. And at =
least one very successfull installation with Bacula 2.0.2. *smile*

Your retention periods, storage needs and compression ratio is of course =
also a factor. YMMV.

regards,

--
Infogate AB Magnus.Ahl < at > in...
Storgatan 29 tel: 035-171970
Box 345 fax: 035-171979
301 08 Halmstad http://www.infogate.se

-----Original Message-----
From: bacula-users-bounces < at > li...=20
[mailto:bacula-users-bounces < at > li...] On Behalf=20
Of paul van allsburg
Sent: Friday, March 09, 2007 6:01 AM
To: bacula-users < at > li...
Subject: [Bacula-users] recommended autoloader
=20
I'd like to purchase an autoloader to run with bacula. I=20
need to do up to 2tb a night and I'd like to look at the=20
models that work best with this software. Any offhand=20
recommendations on hardware/tape format? =20
Thanks! =20
Paul
=20
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On 3/9/07, paul van allsburg <paulvanall < at > ch...> wrote:
I'd like to purchase an autoloader to run with bacula. I need to do up
to 2tb a night and I'd like to look at the models that work best with
this software. Any offhand recommendations on hardware/tape format?
Thanks!
Paul

I really like my exabyte magnum224 with 24 slots and 2 LTO 2 drives.
It works great with bacula as I currently have around 7TB of data
backed up . I am not sure what is going to happen to this model though
since exabyte was bought by tanberg data and they sell similar
products.

John

I'd like to purchase an autoloader to run with bacula. I need to do up
to 2tb a night
2TB in one night. You may have to get an LTO3 autoloader to do that. I
hope your have a gigabit link to the data storage. I remember doing a
2TB backup in the past but I am sure it around 15 to 20 hours to
complete.

John

What Linux flavor are you using with this piece of
equipment? More importantly, what scsi card are you
using?

ZK

--- Magnus Ahl <Magnus.Ahl < at > in...> wrote:


Hi Paul!

I.m.h.o. DELL PowerVault 124T-DLT provides a _lot_
bang for the bucks. 6.4 TB native storage on 16
tapes for approx. €4100. And at least one very
successfull installation with Bacula 2.0.2. *smile*

Your retention periods, storage needs and
compression ratio is of course also a factor. YMMV.


regards,

--
Infogate AB Magnus.Ahl < at > in...
Storgatan 29 tel: 035-171970
Box 345 fax: 035-171979
301 08 Halmstad http://www.infogate.se

-----Original Message-----
From: bacula-users-bounces < at > li...

[mailto:bacula-users-bounces < at > li...]
On Behalf
Of paul van allsburg
Sent: Friday, March 09, 2007 6:01 AM
To: bacula-users < at > li...
Subject: [Bacula-users] recommended autoloader

I'd like to purchase an autoloader to run with
bacula. I
need to do up to 2tb a night and I'd like to look
at the
models that work best with this software. Any
offhand
recommendations on hardware/tape format?
Thanks!
Paul




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Zakai Kinan wrote:

What Linux flavor are you using with this piece of equipment?
More importantly, what scsi card are you using?

We purchased the complete hardware solution from DELL; a PowerVault 124T
LTO-3 connected to a PowerEdge 860 Server.

I believe the SCSI card in the PE 860 announces itself as a "Adaptec 39320A
Ultra320 SCSI adapter" according to the operating system, CentOS 3.8.

(The PE860 was a low-budget choice against my will. We normally purchase PE
2950 and PE 1950 with full redundancy (EEC memory, dual processors, hardware
RAID, dual PDUs and redundant disks in either RAID1 or RAID5) )

regards,

--
Infogate AB Magnus.Ahl < at > in...
Storgatan 29 tel: 035-171970
Box 345 fax: 035-171979
301 08 Halmstad http://www.infogate.se

John Drescher schrieb:
I'd like to purchase an autoloader to run with bacula. I need to do up
to 2tb a night
2TB in one night. You may have to get an LTO3 autoloader to do that. I
hope your have a gigabit link to the data storage. I remember doing a
2TB backup in the past but I am sure it around 15 to 20 hours to
complete.

How usefull is spooling in this case? The amount of data here is
growing too. At the moment I'm spooling the data to disk before
writing it to tape, but I'm only backing up a few hundred Gb's.

spooling throughput:
Job write elapsed time ... Transfer rate = 51.15 M bytes/second

tape throughput :
Despooling elapsed time ... Transfer rate = 70.29 M bytes/second

overall throughput:
Rate: 27022.4 KB/s

For 2TB I would need ~18h with spooling and ~11h without. I'm not sure
how critical shoe shining is for LTO3 drives. But it would be
definitly nice if one could spool and despool data at the same time.
So that bacula starts despooling to tape right after filling the
buffer with a certain amount of data. Depending on the disks that are
use for spooling this would raise the overall performance, maybe not
to the max. despool rate, but over the current overall throughput. I
think there was a discussion about this on the list last year, and
maybe a feature request too.

To get on topic again:

I can recommend the NEC-T40A LTO-3 changer. It starts with 24 slots
and can be expanded to 40 slots with a simple licence key (2 keys,
each for 8 slots). It's working fine with bacula.

Ralf

On Fri, 9 Mar 2007, Ralf Gross wrote:

How usefull is spooling in this case?

Not useful if only doing one job.

Essential if running concurrent jobs.

For 2TB I would need ~18h with spooling and ~11h without. I'm not sure
how critical shoe shining is for LTO3 drives. But it would be
definitly nice if one could spool and despool data at the same time.
So that bacula starts despooling to tape right after filling the
buffer with a certain amount of data.

It only does this for concurrent jobs.

Note that keeping up with an LTO3 drive requires FAST spooling/despooling
operations and this can only be achieved by striping across multiple
physical drives.