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From: Jolly Roger <jollyroger@pobox.com>
Newsgroups: comp.sys.mac.apps
Subject: Re: Photos in iPhoto shared between Macs
Date: 23 Dec 2013 18:58:34 GMT
Organization: People for the Ethical Treatment of Pirates
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On 2013-12-23, Lewis <g.kreme@gmail.com.dontsendmecopies> wrote:
> In message <slrnlbgsg1.7ol.mr@irc.sandman.net> 
>   Sandman <mr@sandman.net> wrote:
>> In article <slrnlbgkdo.1vok.g.kreme@amelia.local>, Lewis <g.kreme@gmail.com.dontsendmecopies> wrote:
>
>>> > What performance do you get out of it? R/W speeds? What disks do you use in
>>> > it?
>>>
>>>  I have 4TB drives in it and it sits off my main switch. I get, at times,
>>>  ~40MB/s writing to it. I have not read much from it because I'm still
>>>  filling it up. I am also reading from one network mounted volume while
>>>  writing to the Drobo.
>>>
>>>  Also, this is from a machine that is in use for other things at the same
>>>  time and I haven't taken any efforts to maximize my throughput. It's as
>>>  fast as writing to any other networked drives on my LAN (which, again,
>>>  is not optimized).
>
>> Yeah, that's pretty slow, comparable to about USB2 speed.
>
> I never get anywhere near 40MB/s from USB2 drives. 25MB/s is about the
> max.
>
>> I need something substantially faster than that. Granted, putting SSD
>> in it should increase performance as well, but how much of pentaly
>> does the drobo impose on the speed of the drives?
>
> Like I said, my network is not optimized and I am using the computer for
> other things at the same time, as well as copying from one network drive
> to the Drobo, so I think up to 40MB/s is excellent.
>
> The Drobo *looks* like it is using something very similar to RAID5.

You should always use the best tool for the job, of course; and it does
pay to make informed purchasing decisions.

According to Drobo, the Drobo 5D and Drobo mini are the models that are
best suited for high-performance applications (speed):

<http://www.drobo.com/how-it-works/performance-professional/>

Assuming you configure one of these units with an SSD as designed, they
do seem to deliver very fast performance for such a RAID device. And
there seems to be an across-the-board performance boost from the data
tiering technology they are using.

-- 
E-mail sent to this address may be devoured by my ravenous SPAM filter.
I often ignore posts from Google. Use a real news client instead.

JR