HAST slowness ?

[Mike Tancsa]

I am trying to setup my first HAST setup and for some reason, traffic 
sync seems to be really slow.  If I do something simple like


#dd if=/dev/zero of=/hastvirt/test count=2000 bs=1024k

on the primary box, traffic on the secondary never gets much beyond a 
Mb/s ?!?!

iperf and netrate show I can pretty well saturate across the link. There 
are no errors and the underlying NICs are both at gigabit with no other 
traffic. Everything seems happy, just very slow to sync. Any idea where 
to start debugging ?

# ifstat -b -i vlan5
       vlan5
  Kbps in  Kbps out
   840.40    621.14
   825.26    622.40
   768.74    577.49
12772.84   1099.10
   976.68    729.80
   856.61    645.19
   751.33    561.07
   854.44    637.67
  1087.46    811.47
   798.61    600.51
   837.40    624.65
   957.50    719.61
   945.90    697.86
   756.10    573.92
   869.78    649.61
   935.69    706.42
   784.65    588.13
   835.90    627.21
  1050.15    772.38
   772.70    580.70
   795.23    589.38
   869.19    660.23
   899.00    679.72
   837.06    619.58
   809.34    607.60
   981.75    735.31
   875.33    657.42
   842.79    627.45
   931.13    694.73

# ifconfig vlan5
vlan5: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
         options=303<RXCSUM,TXCSUM,TSO4,TSO6>
         ether 00:1e:67:84:c8:ca
         inet 1.1.1.2 netmask 0xfffffff8 broadcast 1.1.1.7
         inet6 fe80::21e:67ff:fe84:c8ca%vlan5 prefixlen 64 scopeid 0x4
         nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
         media: Ethernet autoselect (1000baseT <full-duplex>)
         status: active
         vlan: 5 parent interface: igb0


# hastctl status
Name    Status   Role           Components
disk1   complete secondary      /dev/ada0p4     1.1.1.1
disk2   complete secondary      /dev/ada1p4     1.1.1.1

# hastctl list
disk1:
   role: secondary
   provname: disk1
   localpath: /dev/ada0p4
   extentsize: 2097152 (2.0MB)
   keepdirty: 0
   remoteaddr: 1.1.1.1
   replication: memsync
   status: complete
   workerpid: 888
   dirty: 0 (0B)
   statistics:
     reads: 0
     writes: 40529
     deletes: 12
     flushes: 22
     activemap updates: 0
     local errors: read: 0, write: 0, delete: 12, flush: 0
     queues: local: 0, send: 0, recv: 0, done: 0, idle: 255
disk2:
   role: secondary
   provname: disk2
   localpath: /dev/ada1p4
   extentsize: 2097152 (2.0MB)
   keepdirty: 0
   remoteaddr: 1.1.1.1
   replication: memsync
   status: complete
   workerpid: 889
   dirty: 0 (0B)
   statistics:
     reads: 0
     writes: 40529
     deletes: 12
     flushes: 22
     activemap updates: 0
     local errors: read: 0, write: 0, delete: 12, flush: 0
     queues: local: 0, send: 0, recv: 0, done: 0, idle: 255


	---Mike

-- 
-------------------
Mike Tancsa, tel +1 519 651 3400
Sentex Communications, mike at sentex.net
Providing Internet services since 1994 www.sentex.net
Cambridge, Ontario Canada   http://www.tancsa.com/