Parallel rsync's for better Performance.

[Matthias Schniedermeyer]

On 28.10.2009 09:05, Satish Shukla wrote:
>  
> 
> Hi ,
> 
> We have huge data to sync usually everyday and I wish rsync could guarantee performance.
> 
> I thought of spliting the directories and run parallel rsyncs on them. It may cost me some network, but I can control that from the MAX_RSYNC_PROCESS variable. Can some one evaluate pros and cons of this design?. Any help is heartily appreciated. 

That only works IF:
- You have SSDs (preferably good ones, both sides)
- Each rsync covers a different physical HDD (both sides)
- You have a massive Array with truck-loads of HDDs and a matching
  controller or something along that line (again both sides).
- A combination of the above would also work

Otherwise parallel rsyncs completly kill any performance you had because 
normal HDDs will fall into a seek-storm, when more than 1 rsync works on 
them.





Bis denn

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