Florian,
Btw, just by coincidence I just published the Copy / Migration section of my
online Bacula course, that you will probably need to make the disk2disk2tape
backups: https://www.udemy.com/bacula-backup-software/
Kudos,
=======================================================================
Heitor Medrado de Faria - LPIC-III | ITIL-F | Bacula Systems Certified
Administrator II
15 a 26 de junho: Treinamento Telepresencial Bacula:
http://www.bacula.com.br/?p=2174
61 8268-4220
Site: www.bacula.com.br | Facebook: heitor.faria | Gtalk: heitorfa...@gmail.com
========================================================================
> De: "Ana Emília M. Arruda" <emiliaarr...@gmail.com>
> Para: "Florian Rist" <fr...@fs.tum.de>
> Cc: Bacula-users@lists.sourceforge.net
> Enviadas: Domingo, 17 de maio de 2015 11:21:47
> Assunto: Re: [Bacula-users] Is Bacula and a LTO drive right for me?
> Hello Florian,
> On Sun, May 17, 2015 at 6:48 AM, Florian Rist < fr...@fs.tum.de > wrote:
>> Hi Ana,
>> thanks for your reply.
> You're welcome :-)
>> > The most recent tape drives technology are LTO-6. The LTO-6 tapes
>> > have a native capacity of 2.5 TB and up to 6.25 TB of compressed data.
>> > Unfortunately it is really difficult to reach such amount of data in a
>> > tape. Maybe a 1.5:1 compression rate depending on your data.
>> Compression rate will be not good here, as most of the data is image and
>> video data, usually already well compressed.
> So you will need a lot of space for your full backups.
>
>> > So you will need more than one tape for a full backup and this will
>> > need
>> > manual intervention for changing tapes.
>> Yes, I know, as long as this is supported (and as far as I can see it
>> is) by Bracula that's fin. I remember it was difficult using Amanda in
>> 1996 or so.
>> > If this is not a problem for you Bacula and an LTO drive is a
>> > feasible solution. Otherwise you should probably think about a tape
>> > library for this work.
>> Yes, a library would be good, but I cant afford one now. Maybe I could
>> get a old used library and replace the drive by a new one...
>> > Yes, You can have full/differential/incremental backups in a
>> > hard disk and then write once a week to tape. This is commonly
>> > known as disk-to-disk-to-tape (D2D2T) backups.
>> OK, in this case how much hard drive storage would I need? Enough to
>> hold the full backup ore just a few TB for the weekly incremental
>> backups?
>> > What do you mean about "slow Network"? Could you be more specific?
>> 100Mb/s and not the best topology, a few PC via VPN through 100 MBit/s
>> LAN
>
> I don't think this will be a problem. I had this topology a few years ago
> with
> a standalone LTO drive. And it worked fine for a few GB being backed up in a
> few nightly hours.
>> > Are your data go across wan links? There are lots of known cases
>> > with Bacula working across wan links with no problems.
>> No WAN, I just wondered if I need to ensure a minimum data throughout
>> for the LTO. I member some problems in this respect with the DDS drive.
> I think you should do a few questions about your data.
> 1) How important is my data?
> 2) For how long should I keep a backup of them? When they will be reclaimed? I
> need to keep them just for a total disaster recover? They could be reclaimed
> from a year ago? From a week ago? From a month ago?
> There are a lot of Bacula can do for you, but it is important to have this
> previous knowledge about your data.
> It is clear that you will need a full backup of about 18 TB. But will you
> need
> 1 full backup per month? 1 full backup per week?
> A simple solution could be having one full backup per month and daily
> differential. In this case, you will need to keep 2 full backups and about 30
> daily differential.
> Your full backups could be divided into smaller ones to fill in one tape. And
> you could run daily differential and full backups from different data. This
> way
> you could use a low cost storage array and your tape drive (which is your
> technology?).
> Please, could you tell us what are your needs about backup retentions and
> periodicity? I'm sure you will have a lot of people here to help you.
>> See you
>> Flo
> Best regards,
> Ana
>> ------------------------------------------------------------------------------
>> One dashboard for servers and applications across Physical-Virtual-Cloud
>> Widest out-of-the-box monitoring support with 50+ applications
>> Performance metrics, stats and reports that give you Actionable Insights
>> Deep dive visibility with transaction tracing using APM Insight.
>> http://ad.doubleclick.net/ddm/clk/290420510;117567292;y
>> _______________________________________________
>> Bacula-users mailing list
>> Bacula-users@lists.sourceforge.net
>> https://lists.sourceforge.net/lists/listinfo/bacula-users
> ------------------------------------------------------------------------------
> One dashboard for servers and applications across Physical-Virtual-Cloud
> Widest out-of-the-box monitoring support with 50+ applications
> Performance metrics, stats and reports that give you Actionable Insights
> Deep dive visibility with transaction tracing using APM Insight.
> http://ad.doubleclick.net/ddm/clk/290420510;117567292;y
> _______________________________________________
> Bacula-users mailing list
> Bacula-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/bacula-users
------------------------------------------------------------------------------
One dashboard for servers and applications across Physical-Virtual-Cloud
Widest out-of-the-box monitoring support with 50+ applications
Performance metrics, stats and reports that give you Actionable Insights
Deep dive visibility with transaction tracing using APM Insight.
http://ad.doubleclick.net/ddm/clk/290420510;117567292;y
_______________________________________________
Bacula-users mailing list
Bacula-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/bacula-users
