Francois PIETTE wrote: >> I've written a FTP-uploader without taking much care of speed issues. >> It uploads 17000 files with total size of 830 MB in 56 mins in my >> 100 MBit/s LAN (logging each FTP-command). >> >> What do you think, is that: >> a) Poor >> b) OK >> c) Fast >> >> I currently don't have any idea. > > Actually, this is a lot of small files (48KB mean size). > Speed is roughly 2 Mbps which is low for a 100 Mbps.
Oha, as I read between the lines, I have to rework my code :( > Do you establish a new connection for each file ? A new data connection is established for each file, the control connection however is not re-established. > What about directory changes ? The directory tree is created at the remote end if not yet present. > Is it a single FTP connection for all files sequentially ? Yes, stupidly one file after the other (that shall not be changed, since multiple instances shall be reserved for sendind to different destinations the same files concurrently). > Is it a single destination server ? Yes, Serv-U was the test server. > What about authentication ? If you do a new connection for each file, > autenthication alone can be time consuming. There's only one session. > What if you transfert the same data volume (830MB) in a single file ? Needs testing, but from memory, LAN speed looked quite OK. > Same question if you break into 4 large file and use 4 instances of > your program ? That would most likely speed up things, currently CPU use is only at 0-15% at the client side. -- Arno Garrels [TeamICS] http://www.overbyte.be/eng/overbyte/teamics.html > > -- > [EMAIL PROTECTED] > The author of the freeware multi-tier middleware MidWare > The author of the freeware Internet Component Suite (ICS) > 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
