#7 Very SLOW reads

[Mikhail T.]

I use smbnetfs here a lot, and am suffering from very low reading throughput. Some times I have to read large files and can see, that they are read at only about 400-500 KB/s. For comparison, smbclient on the same machine can download the same files at about 20MB/s. My Samba is of version 4.7.4 at this time.

I first experienced this problem with 0.6.0, but it is still here with 0.6.1. Please, advise.

[Mikhail T.]

FWIW, I tried redefining the COMM_BUF_SIZE from 4096 to 16384, and even to 65536 -- but the throughput did not improve at all...

Please, help.

[Mikhail T.]

By adding direct_io flag to the list of options of mount_fusefs, I was able to raise the throughput to 5-8 megabytes per second depending on the reader's options.

Although a spectacular gain, this is still far below the 20MB/s reported by smbclient...

[Mikhail Kshevetskiy]

SMBNetFS isolate samba communication in separate process, so shared memory used to avoid data coping to/from child process. Try increaseasing shared memory size from 128Kb to some large value. See max_rw_block_size config option

[Mikhail T.]

Tried setting max_rw_block_size to 4194304 and then to 41943040 -- the performance dropped back down to mere hundreds of KB per second, direct_io or not.