We have ftp server installed on linux (CentOS).
Can anybody recommend any linux based benchmark (especially with a lot of writes) which can test performance of this ftp server ?
If you just want to find out what happens under load, try this in sh:
What exactly are you trying to benchmark? Download rates, or read/write rates? Your internet connection is almost certainly the bottleneck here, at least if your server hardware is anything remotely modern. If you're trying to benchmark your read/write rates to disk, then doing this test locally (run the program from the same server the FTP daemon is running on) will do the trick too.