Re: [twsocket] [HELP] FtpServer : Long Process HOWTO
still in my video server, i'm using the FtpServer component to download a set of images, taken from a camera, through one simple RETR call. I guess 'simple' on the client-side only ;) you got it :) On the OnGetProcessing event, i retrieve from a DB (the connection has already been made) all the images needed (range of images provided in the filename which is formatted) and push them into the Client.Datastream. for the algorithm, i have no problem. but what happens if several ftp client asks at the same time for a big amount of images (average : 1 image = 21Ko) let's say 1200 images ? If you're creating a 25MB stream for a client, something's wrong. A client shouldn't have to wait that long for the transfer to start, and certainly shouldn't queue up behind a bunch of others doing the same thing. [...] Well as a matter of fact, i need to transfer 25MB. But i've solved my problem using a RETR for each image. It's much simpler. and as i'm using mysql as DB, each image, to retrieve, takes less than a few ms. so the gap between RETR order and the answer is too small... i may say that'll do it for now. i was trying to generate a big file thinking it was possible to reduce the download time using just one file (kind of an tarball) using one RETR call. but... well, that doesn't do it. thanks for your help anyway ! best regards, Guillaume MAISON - Guillaume MAISON - [EMAIL PROTECTED] 83, Cours Victor Hugo 47000 AGEN Tél : 05 53 87 91 48 - Fax : 05 53 68 73 50 e-mail : [EMAIL PROTECTED] - Web : http://nauteus.com -- To unsubscribe or change your settings for TWSocket mailing list please goto http://www.elists.org/mailman/listinfo/twsocket Visit our website at http://www.overbyte.be
Re: [twsocket] [HELP] FtpServer : Long Process HOWTO
Thanks for your answer François. yep... that's what i was supposing. meaning that if the making of such a file in the event handler take some time (10 s let's say), and i have 10 clients asking almost simultaneously for images, the last one will have to wait for 100 secs before receiving anything. Better then to send files one by one... even if there're 1200+ images... else someone has another idea ? knowing that all the images are stored in a db and retrieved on demand. best regards, FTP server component will send the files simultaneously to all client at their own speed. It is serialized only when in the event handler, not for sending files. -- [EMAIL PROTECTED] http://www.overbyte.be - Original Message - From: Guillaume MAISON [EMAIL PROTECTED] To: iCS support mailing twsocket@elists.org Sent: Tuesday, April 26, 2005 5:10 PM Subject: [twsocket] [HELP] FtpServer : Long Process HOWTO Hi everyone, here's my problem : still in my video server, i'm using the FtpServer component to download a set of images, taken from a camera, through one simple RETR call. On the OnGetProcessing event, i retrieve from a DB (the connection has already been made) all the images needed (range of images provided in the filename which is formatted) and push them into the Client.Datastream. for the algorithm, i have no problem. but what happens if several ftp client asks at the same time for a big amount of images (average : 1 image = 21Ko) let's say 1200 images ? Is Each OnGetProcessingEvent fired one after anoher ? which would then result in a queueing of each request... thanks for your help ! Best regards, Guillaume MAISON - Guillaume MAISON - [EMAIL PROTECTED] 83, Cours Victor Hugo 47000 AGEN Tél : 05 53 87 91 48 - Fax : 05 53 68 73 50 e-mail : [EMAIL PROTECTED] - Web : http://nauteus.com -- To unsubscribe or change your settings for TWSocket mailing list please goto http://www.elists.org/mailman/listinfo/twsocket Visit our website at http://www.overbyte.be -- To unsubscribe or change your settings for TWSocket mailing list please goto http://www.elists.org/mailman/listinfo/twsocket Visit our website at http://www.overbyte.be Guillaume MAISON - Guillaume MAISON - [EMAIL PROTECTED] 83, Cours Victor Hugo 47000 AGEN Tél : 05 53 87 91 48 - Fax : 05 53 68 73 50 e-mail : [EMAIL PROTECTED] - Web : http://nauteus.com -- To unsubscribe or change your settings for TWSocket mailing list please goto http://www.elists.org/mailman/listinfo/twsocket Visit our website at http://www.overbyte.be
Re: [twsocket] [HELP] FtpServer : Long Process HOWTO
meaning that if the making of such a file in the event handler take some time (10 s let's say), and i have 10 clients asking almost simultaneously for images, the last one will have to wait for 100 secs before receiving anything. You you have to hang into the event handler for 10 seconds, then you have a problem. You should redesign your code as an asynchronous operation, probably using threads. else someone has another idea ? knowing that all the images are stored in a db and retrieved on demand. You don't need to have to wait 10 seconds to get the image from the DB ! Or if really you have, then use another DBMS. -- [EMAIL PROTECTED] http://www.overbyte.be -- To unsubscribe or change your settings for TWSocket mailing list please goto http://www.elists.org/mailman/listinfo/twsocket Visit our website at http://www.overbyte.be
[twsocket] [HELP] FtpServer : Long Process HOWTO
Hi everyone, here's my problem : still in my video server, i'm using the FtpServer component to download a set of images, taken from a camera, through one simple RETR call. On the OnGetProcessing event, i retrieve from a DB (the connection has already been made) all the images needed (range of images provided in the filename which is formatted) and push them into the Client.Datastream. for the algorithm, i have no problem. but what happens if several ftp client asks at the same time for a big amount of images (average : 1 image = 21Ko) let's say 1200 images ? Is Each OnGetProcessingEvent fired one after anoher ? which would then result in a queueing of each request... thanks for your help ! Best regards, Guillaume MAISON - Guillaume MAISON - [EMAIL PROTECTED] 83, Cours Victor Hugo 47000 AGEN Tél : 05 53 87 91 48 - Fax : 05 53 68 73 50 e-mail : [EMAIL PROTECTED] - Web : http://nauteus.com -- To unsubscribe or change your settings for TWSocket mailing list please goto http://www.elists.org/mailman/listinfo/twsocket Visit our website at http://www.overbyte.be
Re: [twsocket] [HELP] FtpServer : Long Process HOWTO
FTP server component will send the files simultaneously to all client at their own speed. It is serialized only when in the event handler, not for sending files. -- [EMAIL PROTECTED] http://www.overbyte.be - Original Message - From: Guillaume MAISON [EMAIL PROTECTED] To: iCS support mailing twsocket@elists.org Sent: Tuesday, April 26, 2005 5:10 PM Subject: [twsocket] [HELP] FtpServer : Long Process HOWTO Hi everyone, here's my problem : still in my video server, i'm using the FtpServer component to download a set of images, taken from a camera, through one simple RETR call. On the OnGetProcessing event, i retrieve from a DB (the connection has already been made) all the images needed (range of images provided in the filename which is formatted) and push them into the Client.Datastream. for the algorithm, i have no problem. but what happens if several ftp client asks at the same time for a big amount of images (average : 1 image = 21Ko) let's say 1200 images ? Is Each OnGetProcessingEvent fired one after anoher ? which would then result in a queueing of each request... thanks for your help ! Best regards, Guillaume MAISON - Guillaume MAISON - [EMAIL PROTECTED] 83, Cours Victor Hugo 47000 AGEN Tél : 05 53 87 91 48 - Fax : 05 53 68 73 50 e-mail : [EMAIL PROTECTED] - Web : http://nauteus.com -- To unsubscribe or change your settings for TWSocket mailing list please goto http://www.elists.org/mailman/listinfo/twsocket Visit our website at http://www.overbyte.be -- To unsubscribe or change your settings for TWSocket mailing list please goto http://www.elists.org/mailman/listinfo/twsocket Visit our website at http://www.overbyte.be
