Doing Cyrus *right* for a large installation

[Eric Luyten]

On Thu, January 15, 2009 8:57 am, Rudy Gevaert wrote:
> Andrew Morgan wrote:
>
>
>> For those of you running large installations, how do you back them up?
>>
>
> We have 7 backends:
> 400G  320G   81G  80% /mail/mail1
> 400G  273G  128G  69% /mail/mail2
> 450G  390G   61G  87% /mail/mail3
> 400G  322G   79G  81% /mail/mail4
> 400G  270G  131G  68% /mail/mail5
> 450G  397G   54G  89% /mail/mail6
> 50G  4.8G   46G  10% /mail/mail7

Eight partitions here :

   kbytes    used       avail       capacity  Mounted on
   351079625 266896238  80672591    77%       /cyr1
   351079625 305166467  42402362    88%       /cyr2
   351079625 279837829  67731000    81%       /cyr3
   351079625 270193664  77375165    78%       /cyr4
   423336176 355345883  63756932    85%       /cyr5
   423336176 317695828 101406987    76%       /cyr6
   423336176 353966927  65135888    85%       /cyr7
   423336176 375884714  43218101    90%       /cyr8



> For mail1-6 incremental backup time takes between 2h and 7h, we suspect
> a storage (misconfiguration) issue.
>
> Fulls take a lot longer, but I can't give you any time estimates now.

Our fulls are done on Saturdays (4 partitions) and Sunday (4 partitions)
and roughly take 16 hours each (as we observe 50 MB/s effective transfer
speed, those 16 hours are obviously not fully used).

Incrementals take 30 minutes per partition using Veritas NetBackup
FlashBackup.


> For the moment we don't backup the replica's.  Nor use them.  But we
> could do it.
>
> We are 'planning' a storage migration too the coming months.


Same here (could even be 'weeks').


Eric Luyten, Computing Centre VUB/ULB.