Hi, >>> Here my question is that, is it true that open two wget will affect >>> the downloading speed? better one by one, just suspect it. >> >> Let's assume you have a 1.0 Mbit/s download connection. Because it >> makes the math easier. And assume you need a 1.0 Mbyte file. With no >> other overhead it will take aproximately 10 seconds to download. >> >> Now let's assume that you download two of those files at the same >> time. You still only have 1.0Mbit/s download speed. But now you are >> downloading 2.0Mbytes of data in total. Obviously the total download >> will take aproximately 20 seconds to download. >> >> If you ran them sequentually then the first one would finish in 10 >> seconds and then the second one would start and it would finish 10 >> seconds later. So it would take 20 seconds in total for both to >> download both of those files. >> >> If you ran them both at the same time then neither would be able to >> get the full 1.0Mbit/s download speed. It should balance out between >> them and each would get about 0.5Mbit/s download speed. Which would >> double the amount of time each would take. Each would take about 20 >> seconds to download those files but both are running at the same time. >> So once again it would take 20 seconds in total for both to download >> those files. No difference!
One other thing to keep in mind. Usualy when downloading a file with a "chatty protocol", one that needs to confirm downloading a block to the server before the next block is sent, the actual filetransfer wil not fill the full bandwith, in those cases a second download will fill up that available bandwith. I see that a lot when I transfer files via my VPN connection from my Windows PC from/to the Windows server. With a WAN optimized file protocol that is filling the available bandwith starting a second download at the same time will not help. Bonno Bloksma -- To UNSUBSCRIBE, email to [email protected] with a subject of "unsubscribe". Trouble? Contact [email protected] Archive: http://lists.debian.org/[email protected]
