I'm seeing some really poor performance out of my FreeNAS (ver 9.10)
machine, running Samba "4.3.6-GIT-UNKNOWN". I'm using IOMeter to
benchmark
sequential reads, and getting around 35-40 MB/sec, which seems unusual.
Mostly, I'm hoping someone can point me in the direction of a decent
tuning guide for a SOHO machine running Samba, but if you're inclined,
I'll
delve into what I've tried/tinkered with below.
The hardware on My FreeNAS machine is an Avoton C2550, 32 MB ECC RAM, 7x2TB
HDDs in raidz2 config and using a pair of SSDs as cache devices for ZFS.
The motherboard has an onboard Intel Gigabit NIC and I've recently added a
Chelsio T320 10Gbe card as well.
I've benchmarked the local disk read speed and I get around 565MB/sec
reading a file that far-exceeds the NAS' RAM.
I've also used iperf to confirm the network interfaces aren't the
bottleneck. A single instance/thread of iperf pushes 921Mb/sec over the
1Gbe line and 5.07 Gb/sec over the 10Gbe.
There's not much else going on my NAS at the time I'm seeing these slow
transfers. A peek at top shows the overal CPU utilization staying under
20%, a peek at the individual cores during the slow transfers doesn't show
any one core ever exceeding around 25% utilization.
Everything so far seems to suggest that there's plenty of disk speed,
available bandwidth (on either interface) and CPU cycles. Because I'm
seeing the same slow transfers on both interfaces, I'm suspicious that
there's something about my Samba configuration which is suboptimal and I
need some direction/help in making those changes.
The contents of /usr/local./etc/smb4.conf have been pasted at the end of
the email.
I completely understand I'm unlikely to see the 10Gbe link saturated by a
single session and I don't have extremely lofty expectations. But do have
250MB/sec picked out as a hopeful goal.
Does anybody have any suggestions on how I can increase performance with my
setup?
smb4.conf
---------------
[global]
server max protocol = SMB3
encrypt passwords = yes
dns proxy = no
strict locking = no
oplocks = yes
deadtime = 15
max log size = 51200
max open files = 942104
logging = file
load printers = no
printing = bsd
printcap name = /dev/null
disable spoolss = yes
getwd cache = yes
guest account = nobody
map to guest = Bad User
obey pam restrictions = yes
directory name cache size = 0
kernel change notify = no
panic action = /usr/local/libexec/samba/samba-backtrace
nsupdate command = /usr/local/bin/samba-nsupdate -g
server string = DrTeeth - FreeNAS Server
ea support = yes
store dos attributes = yes
lm announce = yes
time server = yes
acl allow execute always = true
dos filemode = yes
multicast dns register = yes
domain logons = no
local master = yes
idmap config *: backend = tdb
idmap config *: range = 90000001-100000000
server role = standalone
netbios name = DRTEETH
workgroup = LAN
security = user
pid directory = /var/run/samba
create mask = 0666
directory mask = 0777
client ntlmv2 auth = yes
dos charset = CP437
unix charset = UTF-8
log level = 1
[homes]
valid users = %U
path = /mnt/volume1/homes/%U
comment = Home Directories
printable = no
veto files = /.snapshot/.windows/.mac/.zfs/
writeable = yes
browseable = yes
vfs objects = zfs_space zfsacl aio_pthread streams_xattr
hide dot files = yes
guest ok = no
nfs4:mode = special
nfs4:acedup = merge
nfs4:chown = true
zfsacl:acesort = dontcare
[Archive]
path = /mnt/volume1/Archive
printable = no
veto files = /.snapshot/.windows/.mac/.zfs/
writeable = yes
browseable = yes
vfs objects = zfs_space zfsacl aio_pthread streams_xattr
hide dot files = yes
guest ok = no
nfs4:mode = special
nfs4:acedup = merge
nfs4:chown = true
zfsacl:acesort = dontcare
[Backups]
path = /mnt/volume1/Backups
comment = Backups Share
printable = no
veto files = /.snapshot/.windows/.mac/.zfs/
writeable = yes
browseable = yes
vfs objects = zfs_space zfsacl aio_pthread streams_xattr
hide dot files = yes
guest ok = no
nfs4:mode = special
nfs4:acedup = merge
nfs4:chown = true
zfsacl:acesort = dontcare
