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Herman,
I'm still thinking about this one ... it would be nice to know the
cause before trying to work around it.
I did two tests today:
- 600 symbols (S&P500 plus a few) ... 3000 * 1 min bars == 6 days ==
93kb per bar ... downloaded all OK .... eS DataManager popped up a
warning at approx 30/60/90% of download == every 200 symbols ... I
clicked OK and the download sailed on .... it would have kept going
even if I hadn't acknowledged the popup.
- 500 symbols (S&P) ... 100,000 * 1 min bars == 208 days == 3125KB
per bar == way over the max possible bakfill (approx 6 months for 1
min bars) ... download locked up after only 4% == approx 20
symbols ... this is way below the cumulative byte for 200 symbols *
backfill limit .... no warning about exceeding symbol limit.
I am not sure about what the cause is ... eS fault, AB plugin fault
OR throttling by eS OR something else.
brian_z
--- In amibroker@xxxxxxxxxxxxxxx, "brian_z111" <brian_z111@xxx> wrote:
>
> I use eS - I am not a heavy user or particularly knowledgeable.
>
> I have also had this occur.
>
> I concluded it was because I was exceeding my symbol limit.... I
was a
> bit surprised about this.
>
> eS allow unlimited symbols, theoretically, but only x number at a
time
> (I have the base 200).
>
> I expected to be able to backfill (exploration) with an unlimited
no.
> of symbopls because it is not using them simultaneously (streaming)
as
> per the quote window ..... the AB manual says that the AB plugin
> rotates a symbol out of the list as it is filled and enters the
next
> one .... logically I assume the plugin can present the request to
eS
> servers one symbol at a time so why should it lock up on excess
symbols?
>
> Anyway, it does.
>
> I didn't reach a conclusion whether the AB plugin wasn't doing what
the
> manual said it would or if I was misunderstanding something.
>
> I think eS is cutting off the download.
>
> The only solution I found was to batch the download via watchlists
(as
> per D's suggestion) ... I do manually turn off the plugin after
each
> batch ... not sure if I need to .... instinct told me to do that
and I
> didn't push it because of the effort required.
>
> Perhaps you could check with AB support if the symbol rotation
feature
> was/is/should be working OR has that been discontinued for some
reason.
>
> I believe it would work if you find a way to auto start AB and
batch
> explore etc
>
> brian_z
>
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