Facebook

Login

Support Sailonline

If you haven't already - join the SAILONLINE YACHT CLUB!

Please also consider making a donation - all amounts are greatly appreciated!

Board » Technical Support » Keeping the client in synch

Posted by
outlaw


Users avatar

Posts
33
Registered at
2012-06-01 13:37:55
2014-01-09 10:12:37 - Keeping the client in synch
This is quite urgent with the upcoming Sprint Cup races.

I'm also not sure if you guys have the ability to change the client on short notice...

Anyway, boat position on the server is updated every 10s. The client queries boat.xml every 15.2s. This leaves us in the dark on the real position of our boats, critical for sharp roundings like Orno 1.

My suggestion is to add a "time to next update" field to the boat.xml, and change the client query timing accordingly.
Posted by
kroppyer


Users avatar

Posts
346
Registered at
2010-02-05 15:25:55
2014-01-09 15:36:50 - Re: Keeping the client in synch
You can have two clients open at the same time, if you time it right, they'll poll the server every 7 or 8 seconds so you'll never skip a jump.

I don't know the server or client code, but from what I've heard it's probably harder than it seems to sync them. It's almost always harder than it seems with software development ;)
Posted by
hmm


Users avatar

Posts
118
Registered at
2011-11-03 13:35:22
2014-01-09 22:34:01 - Re: Keeping the client in synch
How often the server updates the boats depends on the server load, so when the position is updated it is not known when the next update happens.

With the new server the load has been fortunately mostly low, so the updates happen mostly every 10 seconds but there is no guarantee on that.

I don't think this issue is really worth of updating the client. When we are starting to sync requests by the second also the possible network lag should be taken into account so doing this "properly" would not really be that easy.

The current client is same for all and it is something everyone is familiar by now. However, this can be taken into account when planning client updates or new clients in the future. Especially ability to also tell the client to update less frequently during bigger server load could be useful.
Posted by
outlaw


Users avatar

Posts
33
Registered at
2012-06-01 13:37:55
2014-01-10 08:47:29 - Re: Keeping the client in synch
A dedicated racer can work around the issue, casual and new users are a different matter. For example I could imagine a NNYC member signing up for Lake Winnebago and being frustrated by the client.

While exact position doesn't matter in open water SOL has entirely too many coastal and round the buoys races to call it irrelevant.

Regarding prediction, last interval + 2s should be reliable enough, unless load spikes are really extreme. You would also get some savings from less active boats (30s update interval).

Lastly you should consider incentives, having players run two clients seems undesirable etc. (And reloading to force the new wx, on what is probably the maximum load period to begin with...)
Posted by
hmm


Users avatar

Posts
118
Registered at
2011-11-03 13:35:22
2014-01-11 18:15:37 - Re: Keeping the client in synch
If anyone volunteers to change the client code, we might consider how to handle this issue.
Posted by
outlaw


Users avatar

Posts
33
Registered at
2012-06-01 13:37:55
2014-01-23 15:20:08 - Re: Keeping the client in synch
bump.

I unfortunately have zero experience with flash, that said I could give it a spin if no one else will.
Posted by
Svein


Users avatar

Posts
84
Registered at
2009-05-04 15:09:20
2014-01-30 20:39:48 - Re: Keeping the client in synch
This is relevant, if not imminent, issue.
My understanding is that "next" client version is not likely to be in flash environment, but maybe HTML5 or something else - not my field really:)

Please login to post a reply.

Races

Next Race: 00d 00h 00m

Current Races:

ORCV Melbourne to Hobart 2024


Welcome to the legendary "Westcoaster," a race that has tested sailors for over 50 years. Spanning 435 nautical miles, this iconic journey takes racers from Melbourne, across the formidable Bass Strait, and around Tasmania's rugged west coast to the finish line in Hobart. Organized by the Ocean Racing Club of Victoria, the Westcoaster is renowned for its challenging conditions and adventurous spirit. This year, our SOLers will tackle the course in the swift and capable First 47.7, a yacht launched by Beneteau in 2000, built for speed and endurance in long ocean races. Get ready for an exhilarating ride in one of Australia’s most celebrated yacht races!
Race #1841
INFO by brainaid.de
First 47.7 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: SYC
Race starts: Dec 26th 23:00 Registration will open soon
▶ Flash
GO TO RACE

Refeno Rally 2024


Although since 1986 this 300nm course from Recife, Brazil, to Fernando Noronha Island has been run many times IRL, we have only used this route twice in SOL. This time it will be the route of the last race in the ARCH 2024 classification.
Although the winner of the general classification can already be determined, the fight for the next places on the podium should be fierce. There are several contenders and Dofour34 have them at their disposal. Since we are starting in Vida_Maldita's home waters, he will give us a 30-minute handicap. Or maybe we should give it to him? 😊
Race #1865
INFO from brainaid.de
Dufour 34 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking:
ARQ4 - ARCH - SUPSOL - SYC
Race starts: Dec 23rd 17:00 Registration Open!
▶ Flash
GO TO RACE

Tristan da Cunha TIMED Race 2024

Originally designed by NZL_Scotsman, we head for the remote outpost of Tristan da Cunha where gales and storms may come and go but the sea is everlasting. This 64nm TIMED race has been raced on several occasions before, and this time we will be doing it in Rustler 36s.
RE-REGISTER HERE to race again after finishing a run
Race #1875
INFO by brainaid.de
Rustler 36 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking:
TRQ4 - TRCH - SUPSOL - SYC
REGISTRATION CLOSE: Saturday, 28 December at 22:00 UTC
RACE CLOSE: Saturday, 28 December at 23:00 UTC
Race starts: Dec 15th 12:00 Registration Open!
▶ Flash
GO TO RACE

The Beagle in the Azores 2024


And west the Beagle went one final time to round the Cape of Good Hope on May 31 1836. Ashore, Darwin met up with the Astronomer Royal, Herschel, who just happened to be in South Africa at the same time mapping the southern skies. After sounding out his many ideas on evolution and extinction with Herschel, the Beagle now sailed north, stopping briefly in St Helena, Ascension and Brazil, and the Cape Verdes again, to reach the Azores on September 19, 1836. Fitzroy and Darwin at this stage were in a hurry to get back to Britain, but online in 2024 we will stay a little longer to explore this final remote archipelago in our virtual Tall Ship Class B Beagle, 630nm round and about the islands, minding as always in these waters not to bump into any large cetaceans!
Race #1758
INFOby brainaid.de
Tall Ship Class B PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: SVF - SYC
RACE CLOSE: Friday,
December 27 at 2300 UTC.
Race starts: Dec 14th 13:00 Registration Closed
▶ Flash
GO TO RACE

Christmas(W) to Christmas(E) Island 2024

Two waypoints, start and finish, and between them 5827 NM of two oceans. Not much time if we want to sit at the Christmas Eve table. You will need to maintain an average speed of over 10 knots, so prepare your 90ft well and choose the best of the many possible routes. Hands up everyone who knew there were TWO Christmas Islands?! OK, maybe you have sailed this Sailonline course before... but it's time to get ready for the 2024 challenge of a reversed race, starting in the Indian Ocean, racing to the Christmas Island in the Pacific! It also marks the conclusion of our prestigious Ocean Race Championship 2024. Please have fun! Fair winds!
PRIZE: SMPF
Race #1868
INFO by brainaid.de
90ft Monohull PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: OCQ4 - OCCH - SUPSOL - SYC
Race starts: Dec 02nd 11:00 Registration Closed
▶ Flash
GO TO RACE

Go to race archive

SYC Ranking

  1. Sailonline Yacht Club Member WRmirekd
  2. Sailonline Yacht Club Member FreyjaUSA
  3. Sailonline Yacht Club Member Vida_Maldita
  4. Sailonline Yacht Club Member CriticalHippo
  5. Sailonline Yacht Club Member rafa
  6. Sailonline Yacht Club Member Kipper1258
  7. Sailonline Yacht Club Member Satori
  8. Sailonline Yacht Club Member Sax747
  9. Sailonline Yacht Club Member BRENTGRAY
  10. Sailonline Yacht Club Member CollegeFund

View full list

Series

Mobile Client

SYC members have the benefit of access to our mobile/lightweight web client!

The mobile client