ZFS + Samba performance

[Jan Dušátko]

Ahoj

Proveden upgrade na:
samba36-3.6.1       A free SMB and CIFS client and server for UNIX
samba36-smbclient-3.6.1 Samba "ftp-like" client
Situace je stale "stejna", prumer mi klesl na 1,7MB/s. Zacinam mit podezreni
"Cim novejsi verze, tim nizsi propustnost".

Options:
_OPTIONS_READ=samba36-3.6.1
WITHOUT_LDAP=true
WITHOUT_ADS=true
WITHOUT_CUPS=true
WITH_WINBIND=true
WITH_SWAT=true
WITH_ACL_SUPPORT=true
WITH_AIO_SUPPORT=true
WITHOUT_FAM_SUPPORT=true
WITHOUT_SYSLOG=true
WITHOUT_QUOTAS=true
WITHOUT_UTMP=true
WITHOUT_PAM_SMBPASS=true
WITHOUT_DNSUPDATE=true
WITHOUT_AVAHI=true
WITHOUT_EXP_MODULES=true
WITH_POPT=true
WITH_IPV6=true
WITHOUT_MAX_DEBUG=true
WITH_SMBTORTURE=true

# cat /boot/loader.conf
...
zfs_load="YES"
...
#ZFS Tunning
vm.kmem_size="512M"
vm.kmem_size_max="1G"
vm.kmem_size_min="256M"
vfs.zfs.prefetch.disable=0

# cat /etc/sysctl.conf
...
net.inet.tcp.local_slowstart_flightsize=10
net.inet.tcp.nolocaltimewait=1
net.inet.tcp.delayed_ack=0
net.inet.tcp.path_mtu_discovery=0
net.inet.tcp.delacktime=100
net.inet.tcp.mssdflt=1460
net.inet.tcp.sendspace=16384
net.inet.tcp.recvspace=16384
net.inet.tcp.slowstart_flightsize=54
net.inet.tcp.inflight.enable=1
net.inet.tcp.inflight.min=6144
net.inet.tcp.hostcache.expire=3900
net.inet.tcp.recvbuf_max=16777216
net.inet.tcp.recvbuf_inc=65536
net.inet.tcp.sendbuf_max=16777216
net.inet.tcp.sendbuf_inc=65536
net.inet.tcp.blackhole=2
net.inet.udp.blackhole=1
net.inet.udp.maxdgram=8192
net.inet.udp.recvspace=16384
net.local.stream.recvspace=16384
net.local.stream.sendspace=16384
kern.ipc.shmall=8388608
kern.ipc.shmmax=67108864
kern.ipc.maxsockbuf=16777216
kern.ipc.nmbclusters=32768
kern.ipc.somaxconn=8192
kern.maxfiles=131072
kern.maxfilesperproc=16384
kern.maxvnodes=262144
vfs.zfs.prefetch_disable=0
vfs.read_max=1024

Jinak pri hledani jsem nasel jednu nesrovnalost. Samba sice zabere necele
procento casu, ale vetsinu stravi ve stavu "sbwait". Dle top-u se jedna o
cas na alokaci socketu. Je zajimave, ze touto necnosti to v pripade zapisu
netrpi, nebo je to mozna tak rychle, ze to nestiham sledovat.

Honza