Hello,
eSignal and IQFeed allow multiple connections to one local data manager and it
works fine.
There are two programs and two plugins but they connect to single data manager.
However, it is advised to open different databases so two instances do not
overwrite each other data which may create problems
(i.e. it is easy to remember that "last write" wins but this may not be what
you need/wish).
This does NOT increase symbol limit however, because symbol limit is ONE common
for subscription and two instances will share the limit.
Please note that you would need to decrease "max symbol" count in File->Database
Settings->Configure so one instance does not consume all symbols leaving no space.
Best regards,
Tomasz Janeczko
amibroker.com
On 2010-07-02 22:59, Herman wrote:
Wow, i didn't know that you could do that!
I just tried it and indeed I can connect but instances to DTN without a problem. I had assumed that, just like running AB on two separate computers, it would
disconnect one of the two.
I don't understand how this works.. because the IQFeed must be called/accessed twice, once by each AmiBroker instance... It is hard to imagine they share the
same plugin. So, two instances of AmiBroker can share and update a DB in real-time?
This raises yet another question: I scan 1800 tickers, would things work better
if I scanned 900 in each of the two AB instances?
Anyone knows?
herman
*>
> Both my instances share one DTN data source... it works very well.
> All happens automatically. Nothing to do on your part. Works very
> well... I see no data lag between the two instances. But I am only
> feeding live about 35 instruments. Nothing more.
> IB I don't know so I can't comment.
> As I say, I share info via a file... it's not perfect and not ideal
> for sure... as I say, I'd like multi-core support for AB which has
> been on the slate for a long time now.
> As these 'non ideal' solutions are fine for backtesting etc - i.e.
> no time dependent (which is what AB has in the past seemed very
> focused on in terms of development), but they are completely useless
> for real time day trading where seconds matter...
> Anyway, just my minor gripe for the day (as I try again to squeeze
> more out of my AFL code in terms of execution time!).
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