On 11/22/2012 7:09 PM, James Harper wrote:
>> And for the file volumes either:
>>
>> 12 x 600GB 15K SAS (RAID 5 or 6?) - faster disks (or is it in a raid 5?) and 
>> less
>> space (approx 6TB)
>>
>> OR
>>
>> 12 x 2TB 7.2K SAS/SATA (RAID 10) - slower disks but more space (approx
>> 11.18 TB)
>>
> If you are backing up over 1Gbit/s ethernet then you require a storage that 
> can write at a maximum of 100mbytes/s and either configuration should be more 
> than capable of handling way more than that, assuming that it never gets 
> ridiculously fragmented. If you use RAID5 then I recommend a hardware RAID 
> controller with battery backed write cache, although it's less of a 
> requirement for "streaming" storage than random access database storage where 
> small (< stripe size) writes are frequent.
>
> I would start by looking at how fast Bacula can push things on to disk. I 
> wonder if there is a way of backing up to /dev/null so this can be measured? 
> Once you have that figure then you can think about what sort of disk 
> throughput you need.
>
> James

The throughput is also highly dependent on the performance of the 
clients. Even the fastest of servers will still be limited by the 
clients themselves for streaming to file storage. What has made a 
substantial difference for me is reducing the time the server spends 
writing spooled attributes to the database. The most noticeable 
improvements are those that increase database performance. SATA drives 
are sufficient for streaming file storage, so I suggest saving cost on 
the file storage and using the savings to purchase SSDs to put the 
database on.



------------------------------------------------------------------------------
Monitor your physical, virtual and cloud infrastructure from a single
web console. Get in-depth insight into apps, servers, databases, vmware,
SAP, cloud infrastructure, etc. Download 30-day Free Trial.
Pricing starts from $795 for 25 servers or applications!
http://p.sf.net/sfu/zoho_dev2dev_nov
_______________________________________________
Bacula-users mailing list
Bacula-users AT lists.sourceforge DOT net
https://lists.sourceforge.net/lists/listinfo/bacula-users