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NT Zenfire FDAX data interruptions
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NT Zenfire FDAX data interruptions

  #21 (permalink)
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steve2222 View Post
Ok, so do I.

I think the problem is that ZF don't allow their servers to be pinged. I recall I read somewhere that they stop this so ping requests don't interfere with the performance of the live data service.

Yes, and although I'm no network specialist, I think that makes sense in order to provide the best possible performance.

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  #22 (permalink)
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Daytrader999 View Post
Yes, and although I'm no network specialist, I think that makes sense in order to provide the best possible performance.

If a server is not answering to ping packets, you can use tracert (traceroute on Linux) to know the latency to the last router. That will give you a good idea of the latency to a "not pingable" server.
Keep in mind that ping packets (ICMP protocol) have usually a very low priority on most routers, so you may take the smaller value found to know what would be the real latency with a normal priority communication.

I agree that 500ms from NZ looks too high. I have a friend in New-Caledonia, and as far as I remember his latency was around 300ms. I assume New-Zeland is using Australian big backbones, so it should be around 350 ms maximum.

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  #23 (permalink)
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My average ping to ZenFire (from the Netherlands) is 111.248 ms with a median of 111.248 (based on 1,167,366 observations).

The ping settings were: a ping every 10 seconds with a max-time out of 2 seconds. 3.157 values were missing, either due to my pc having no internet or the ZF server unreachable within 2 seconds. When I started pinging (march-2012), I was informed by ZenFire support that the bigwells server was suited for 'smoke pings'.

My average ping for the last 1.000 pings (till this evening) was 119.235 ms, so not shockingly above the average ping for all data. However, as @sam028 already has mentioned, these pings do not say anything about what happens in the ZF servers. The ping data also seems to suggest that there are no significant problems on the route to the server.

As the graphics shows, the majority of the pings happen under 200ms:

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Code
pingDF <- read.table("PingOutput_tm_14-1-13.txt", header = TRUE, sep = ";", dec=".", fill = TRUE,
                     stringsAsFactors = FALSE)
> # General layout of table
> head(pingDF[,c(1,6,10)], n = 20)
              DateTime ns0.bigwells.net www.google.com
1  26-03-2012 19:20:54              113             19
2  26-03-2012 19:21:03              106             16
3  26-03-2012 19:21:13              107             16
4  26-03-2012 19:21:23              107             16
5  26-03-2012 19:21:33              109             16
6  26-03-2012 19:21:43              107             17
7  26-03-2012 19:21:53              108             27
8  26-03-2012 19:22:03              106             17
9  26-03-2012 19:22:15              108             17
10 26-03-2012 19:22:24              105             16
11 26-03-2012 19:22:34              107             17
12 26-03-2012 19:22:44              136             18
13 26-03-2012 19:22:54              108             18
14 26-03-2012 19:23:04              106             21
15 26-03-2012 19:23:14              106             17
16 26-03-2012 19:23:24              109             18
17 26-03-2012 19:23:34              107             16
18 26-03-2012 19:23:44              107             18
19 26-03-2012 19:23:54              107             18
20 26-03-2012 19:24:04              109             18
> tail(pingDF[,c(1,6,10)], n = 20)
                   DateTime ns0.bigwells.net www.google.com
1167347 14-01-2013 19:38:23              121            N/A
1167348 14-01-2013 19:38:31              117            152
1167349 14-01-2013 19:38:41              117            158
1167350 14-01-2013 19:38:51              117            159
1167351 14-01-2013 19:39:01              116            152
1167352 14-01-2013 19:39:11              117             16
1167353 14-01-2013 19:39:21              123             17
1167354 14-01-2013 19:39:32              118            154
1167355 14-01-2013 19:39:41              117             18
1167356 14-01-2013 19:39:52              117            154
1167357 14-01-2013 19:40:02              128            157
1167358 14-01-2013 19:40:11              123             23
1167359 14-01-2013 19:40:23              125            N/A
1167360 14-01-2013 19:40:31              121             18
1167361 14-01-2013 19:40:42              117            159
1167362 14-01-2013 19:40:52              124            150
1167363 14-01-2013 19:41:02              119            148
1167364 14-01-2013 19:41:12              124             18
1167365 14-01-2013 19:41:22              120             18
1167366 14-01-2013 19:41:32              117            163
> 
> # General descriptives of ZF ping
> zfMs <- as.numeric(pingDF[,6])
Warning message:
NAs introduced by coercion 
> length(zfMs)
[1] 1167366
> summary(zfMs, digits = 8)
    Min.  1st Qu.   Median     Mean  3rd Qu.     Max.     NA's 
  43.000  106.000  108.000  111.248  115.000 1120.000     3157 
> 
> # For last 1000 pings
> summary(zfMs[(length(zfMs)-999):length(zfMs)], digits = 8)
   Min. 1st Qu.  Median    Mean 3rd Qu.    Max. 
115.000 117.000 118.000 119.235 119.000 185.000 
>hist(zfMs, freq = FALSE, main = "ZF latency (ms) [Netherlands-Chicago] (ns0.bigwells.net)",
+     xlab = "Milliseconds of ping", ylab = "Relative frequency")

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  #24 (permalink)
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andorre View Post
Wednesday afternoon again:

8 interruptions in the last 20 minutes!!

First, one notices that there are no limit number changes, then about 10 seconds later the orange color with the log file message

09.01.2013 17:21:48 Connection Live Account: Primary connection=Connected, Price feed=ConnectionLost

And the reconnection

09.01.2013 17:22:14 Connection Live Account: Primary connection=Connected, Price feed=Connected


In the CET evening there are quite often interruptions as well!!

Same here - I am with you

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  #25 (permalink)
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puma View Post
Same here - I am with you

From one of my customers today:
"
Today at 3:08:06 PM and 3:09:51 connection was lost with ZenFire. They were punctual disconnections. Can you check if it is related to SpeedyTrading or ZenFire?
"
Keep in mind that this happened on his VPS in Chicago, 4 or 5 routers from Zen-Fire servers, with a latency below 1ms...
I told him that was not our fault, I think I was right...

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  #26 (permalink)
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sam028 View Post
From one of my customers today:
"
Today at 3:08:06 PM and 3:09:51 connection was lost with ZenFire. They were punctual disconnections. Can you check if it is related to SpeedyTrading or ZenFire?
"
Keep in mind that this happened on his VPS in Chicago, 4 or 5 routers from Zen-Fire servers, with a latency below 1ms...
I told him that was not our fault, I think I was right...

@sam028

Are the times quoted by your customer USA ET?

If not what, so I can check my log. But my recollection was I had no ZF issues today (haven't for a while) and I have DAX charts up. Having said that I was not connected (by choice) for the whole day.

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  #27 (permalink)
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steve2222 View Post
@sam028

Are the times quoted by your customer USA ET?

If not what, so I can check my log. But my recollection was I had no ZF issues today (haven't for a while) and I have DAX charts up. Having said that I was not connected (by choice) for the whole day.

It was Central Time.
But all this is quite weird, no disconnections from NZ, and disconnection from Chicago, Germany and France ???

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  #28 (permalink)
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sam028 View Post
It was Central Time.
But all this is quite weird, no disconnections from NZ, and disconnection from Chicago, Germany and France ???

@sam028

Hi Sam if you mean USA Central time, then I was not connected at that time - I had finished for the day.

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  #29 (permalink)
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sam028 View Post
But all this is quite weird, no disconnections from NZ, and disconnection from Chicago, Germany and France ???

@sam028:

Well, here you go...


Quoting 
16.01.2013 20:33 Default Error on loading chart data for 'ZS 03-13 Globex': Connection to data server is busy or not available right now. Please try again later.

This situation lasts for about one hour now, connection from Germany to Zen-Fire is fine and was never interrupted, but I can't pull up a new chart...

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  #30 (permalink)
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Daytrader999 View Post
@sam028:

Well, here you go...



This situation lasts for about one hour now, connection from Germany to Zen-Fire is fine and was never interrupted, but I can't pull up a new chart...

Is it a message from your machine in Germany, or from your VPS in Chicago?

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