Performance over network

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Frederic

Cadet
Joined
Sep 8, 2013
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3
hi,

I recently installed Freenas on a Asrock E350M1 motherboard, 8go of ram, and 3*2Tb WD Green working on a raidz1.

I got a write/read speed in the zfs pool pretty good (something like 130MB/s write, and 170MB/s while reading data).
When i do read/write over network to the zpool (with cifs or nfs) i got performance about 45MB/s
If i write data to /dev/null over the network, the speed go around 110MB/s
I dont really understand why the speed writing to the zpool is so slow over the network, maybe one of you got an idea.

Thanks,
--
Frédéric


Code:
root@lisa] ~# zpool status
  pool: pool1
state: ONLINE
  scan: scrub in progress since Sun Sep  8 10:30:48 2013
        2.25T scanned out of 2.65T at 131M/s, 0h53m to go
        0 repaired, 84.81% done
config:
 
        NAME                                            STATE    READ WRITE CKSUM
        pool1                                          ONLINE      0    0    0
          raidz1-0                                      ONLINE      0    0    0
            gptid/e57db2ac-1585-11e3-9962-bc5ff4abea80  ONLINE      0    0    0
            gptid/e666a00e-1585-11e3-9962-bc5ff4abea80  ONLINE      0    0    0
            gptid/e740544a-1585-11e3-9962-bc5ff4abea80  ONLINE      0    0    0
 
errors: No known data errors
 

TheSmoker

Patron
Joined
Sep 19, 2012
Messages
225
First reason would be the cpu @1.6ghz and the fact that samba is not multithreaded.
Second would be the fact that that mobo has a realtek lan chipset.

Sent from my iPad using Tapatalk HD
 

Frederic

Cadet
Joined
Sep 8, 2013
Messages
3
First reason would be the cpu @1.6ghz and the fact that samba is not multithreaded.
Second would be the fact that that mobo has a realtek lan chipset.

Sent from my iPad using Tapatalk HD


That's why i tried with an Intel PRO/1000 PT and nfs, no improvement. nfsd cpu usage is about 40%
 

gpsguy

Active Member
Joined
Jan 22, 2012
Messages
4,472
As TheSmoke said, your CPU's speed is the bottleneck with CIFS.
 
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