[HECnet] RSX FTP Performance Doubled!!

Hi. On 2019-08-28 13:32, Mark Matlock wrote: Cool. I was testing on an 11/70, and depending on file, I could even see about 3x the performance. It's actually about the work of reading the file in the first place. The "problem" is that FTP is using RMS. RMS have some very nice features which gives a fairly good performance. However, some files, RMS can only give block access to, and those were suffering from very slow performance, since FTP then read one block at a time, and sent it. In comparison, for files RMS can deal with as records, RMS can do large blocks, and read ahead. So what I now did was that I changed the block access code to run asynchronously, with large buffers, and with read ahead, which I implemented myself. So there is actually nothing on the network side that caused this improvement, but just file access methods. And since my code is even a bit better than the RMS internal processing for known files, I also switched all access over to this method if the transfer happens between two RSX systems, or for block access mode. Johnny -- Johnny Billquist || "I'm on a bus || on a psychedelic trip email: bqt at softjar.se || Reading murder books pdp is alive! || tryin' to stay hip" - B. Idol