Tips for debugging Samba performance?
- by j-g-faustus
Samba gives me 24 MB/s read and 44 MB/s write, while ftp gives 97 and 112 MB/s under the same circumstances.
The documentation says that
Generally, you should find that Samba performs
similarly to ftp at raw transfer speed.
In my case it clearly doesn't.
Where can I find tips on how to debug Samba performance?
Or alternatively tips for replacing Samba with something else? (I can't use ftp, unfortunately, as I need something that can be used with rsync/rsnapshot.)
More details:
Both computers are running Ubuntu 10.10 (using Samba because I have a Mac as well)
The Samba share is on a local home network, mounted as
$ mount
...
//server.local/share/ on /mnt/share type cifs (rw,mand)
Samba performance was tested by copying (cp) a single file of ~4GB to and from the share, using time for timing and calculating transfer speed by hand.
ftp performance are the numbers from the ftp client for get/put of the same file.
iperf gives network speed ~900 Mbits/s
bonnie++ gives disk speeds 200 MB/s on both sides for block reads as well as block writes
Tried changing the parameters suggested in the performance tuning HOWTO (read/write raw, read size, socket options), most of them made little to no difference. (The one that made a difference caused write speed to drop 50%.)
