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Yahoo Data 101 - Appendix 2
Hello,
1)
The non-working servers were removed from the list in the latest
version of
AQ. All the other seem to work fine. The rotation is to reduce the
chance of
being blocked by the server if you place too many requests in a
short
time
(so - you can speed-up the download) -
Right now - all the servers which are left are working OK.
2)
These are settings that allow you to SLOW DOWN the downloads if
you're
being
blocked by Yahoo because of too many requests in a short time - this
is
done
by increasing the initial delay time and decreasing the simultaneous
downloads.
3)
AmiQuote will retry the downloads and if not sucessful - the
apropriate
message will be displayed (and no data will be downloaded).
Best regards
Marcin Gorzynski
Amibroker.com Technical Support
----- Original Message -----
From: "Brian.B" <brian.z123@xxxxxxxxxxxx>
To: <support@xxxxxxxxxxxxx>
Sent: Wednesday, July 05, 2006 4:48 PM
Subject: [#31286] Amiquote
> Hello Marcin,
>
>
>
> AmiQuote V 1.9
> AmiBroker betaV4.81.1
>
> Q1.
> Referring to the copy from the AQ readme file below what are the
dates
> that the V1.68 statments were made? (editors note i.e. server
rotation).
> Are they still correct?
> Are B & D the up to date servers?
> Is there any chance of AQ downloading data from the 'old' servers
or
have
> you found a way around it.
>
> Why add server rotation in the reg version if rotation leads to
old
data
> servers?
>
> Does the 'old' data/server comment apply to current and
fundamental
data
> i.e. does the current and fundamental data also come through the
load
> balancing server?
>
> Q2.
>
> What is the function of the 3 built-in settings sets: "fail safe
> default", "modem", "dsl/cable" (see Tools->Settings page),
user-defined
>
> Q3.
>
> What happens in AQ during a download if the link to the server
fails?
> Is there any chance of data corruption from intermittent
interruptions to
> the connection?
>
> Regards,
>
> Brian B.
Thus endith Yahoo Data 101.
--- In amibroker@xxxxxxxxxxxxxxx, "brian.z123" <brian.z123@xxx>
wrote:
>
> Allan,
>
> I have very little experience of Yahoo/AmiQuote but from my
initial
> trials I have two areas of concern:
>
> 1. From the help files V1.90 Beta June8, 2006
>
> Yahoo uses server load-balancing so data are delivered by many
> servers "appearing" under one URL. Problem is that some servers
from
> timem to time are not updated (offer only old data) while others
are
> up-to-date. This new setting allows to handle such cases by
selecting
> the server that is up-to-date. Default setting
is "ichart.yahoo.com"
> which works in usual load-balancing scheme (switched servers). But
you
> can also select Server B, C, D, and E. As of today (June 8th)
servers
> B and D offer up-to-date data, while server C and E offer old data
> (only upto 4th and 3rd of June respectively). This may however
change
> at any time. Please note that selection of Servers C, D and E is
> available only in registered version of AmiQuote.
>
> That is from the notes for an earlier version so I am not sure
what
> year that is relevant to, if it still applies and/or if it only
> applies to historical data or to current and fdata downloads as
well.
>
> 2. My second concern was to find out if it is possible to create
holes
> in the data by mis-managing the download(s).
>
> After a little playing around I am of the opinion that AQ works by
> backfilling from the biggest 'hole' in the data to the present by
> default except where the user asks for more data than the default
date
> via use of the 'download from' date.
> It appears that it is either not possible or difficult
> to 'create'holes via AQ downloading but it is something to watch
out
> for.
>
> Brian.
>
> P.S
>
> A couple of minor points re the difficulty of managing symbol
lists
> with Yahoo:
>
> I haven't found a way to get a complete list of all symbols that
Yahoo
> has data for and also while the consituent lists for indices can
be
> downloaded manually they can only be taken 50 at a time.
> For large indexes it is a bit cunmbersome and then the lists have
to
> be patched together.
>
>
> --- In amibroker@xxxxxxxxxxxxxxx, "matrix10014" <allansn@> wrote:
> >
> > Hi all,
> > Just setting up Ami,for the first time and was wondering if
there
> were
> > any strong feelings regarding yahoo EOD vs Quotes plus??
> >
> > Any major benefits or drawbacks??
> >
> > Any insight appreciated
> >
> > Allan
> >
>
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