Slow file transfer ZFS Stripe Volume

[Jamie Walhouse]

Hi,
I have 4 HDD's in a HP N54l
2 x 5gb HDD's in a Mirror
2 x 3gb HDD's in a Stripe

The Mirror works fine no probs

The Stripe works but is painfully slow.

If I transfer/write files to it, it starts off fine 80-90mbs but then slows down to 0mbs, it stops for upto a minute and then speeds upto 80-90mbs again for about 30secs and then slows back to zero again.
this continues for the whole copy process, sometimes it fails halfway through (rare) complaining target doesn't exist.
Reading from the drives seems fine so I don't think it's a hardware error.
if anyone has any ideas to the cause I would be very grateful.

Regards
Jamie

 

[zambanini]

read the forum rules, post your setup details. and change your hard disk size.

 

[Jamie Walhouse]

read the forum rules, post your setup details. and change your hard disk size.

I did read the forum rules,
I searched and my post mentioned the hardware a HP N54l micro server and I also mentioned the setup.
What do you mean change your HDD Size???

 

[dlavigne]

Post the output of zpool status (Use Insert -> Code when pasting).

 

[gpsguy]

What version of FreeNAS are you running? How much RAM do you have in your N54L? Note: one can put 16GB in them.

What protocol are you using? CIFS? Are you copying lots of small files or a big ISO or two?

 

[Jamie Walhouse]

I'm running 8gb of ram and CIFS
Version FreeNAS-9.3-STABLE-201602031011

Code:

[root@FREENAS] ~# zpool status
  pool: Nas
state: ONLINE
  scan: scrub repaired 0 in 16h19m with 0 errors on Sun Jul  3 16:19:45 2016
config:

        NAME                                            STATE     READ WRITE CKSUM
        Nas                                             ONLINE       0     0     0
          mirror-0                                  ONLINE       0     0     0
            gptid/713282a7-389f-11e5-9611-c8cbb8caf4c0  ONLINE       0     0     0
            gptid/3f8883ec-3824-11e5-9807-c8cbb8caf4c0  ONLINE       0     0     0

errors: No known data errors

  pool: Nas-Data
state: ONLINE
  scan: scrub repaired 0 in 6h30m with 0 errors on Sun Jul  3 06:30:56 2016
config:

        NAME                                          STATE     READ WRITE CKSUM
        Nas-Data                                      ONLINE       0     0     0
          gptid/6ac8c2e3-38f4-11e5-8346-c8cbb8caf4c0  ONLINE       0     0     0
          gptid/6b537013-38f4-11e5-8346-c8cbb8caf4c0  ONLINE       0     0     0

errors: No known data errors

  pool: freenas-boot
state: ONLINE
  scan: scrub repaired 0 in 0h7m with 0 errors on Thu Jun 16 03:52:46 2016
config:

        NAME                                          STATE     READ WRITE CKSUM
        freenas-boot                                  ONLINE       0     0     0
          gptid/4dd887e2-a8e0-11e4-b8c1-c8cbb8caf4c0  ONLINE       0     0     0

errors: No known data errors

Nas-Data is the drive pool I'm seeing issues with.

It makes no difference if there are lots of small files or one large file.


Regards
Jamie