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heppoko:/etc/network# hdparm -p /dev/sda

/dev/sda: attempting to set PIO mode to 0 HDIO_SET_PIO_MODE failed: Inappropriate ioctl for device heppoko:/etc/network# hdparm -tT /dev/sda
/dev/sda: Timing cached reads: 470 MB in 2.01 seconds = 234.15 MB/sec Timing buffered disk reads: 244 MB in 3.02 seconds = 80.79 MB/sec

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hdparm -S 0 /dev/sda

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  • 1.7GB°Ì¤Î tar.gz ¥Õ¥¡¥¤¥ë¤ò PC¢«¢ªGbE Hub¢«¢ªServer ´Ö¤ÇžÁ÷¤µ¤»¤ë
  • PC ¤Ï Athlon64x2 3600+ ¤Ë Intel 1000/MT¡¢Seagate Barracuda ES.2
  • Hub ¤Ï ETG2-SH5WH
  • Server ¤Ï GeodeLX-800 ¤Ë RTL8110SC¡¢Seagate Barracuda ES.2
  • samba ¤ÇžÁ÷¤µ¤»¤ë¡£¥½¥±¥Ã¥È¥ª¥×¥·¥ç¥ó¤Ï "TCP_NODELAY SO_RCVBUF=8192 SO_SNDBUF=8192"
  • ¥¸¥ã¥ó¥Ü¥Õ¥ì¡¼¥à¡¢samba.conf ¤ÎÀßÄê¤òÊѹ¹¤µ¤»¤Ä¤Ä¬Äê

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Server->PC samba 110sec (15.85MB/sec)
PC->Server samba 125sec (13.95MB/sec)

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  1. Linux ¦¤ÎMTU ¤ò 4088 ¤è¤ê½½Ê¬Â礭¤ÊÃͤËÀßÄꤹ¤ë¡Êifconfig eth0 mtu 6000¡Ë
  2. Windows ¤«¤é¥µ¥¤¥º¤òÊѤ¨¤Ê¤¬¤é ping ¤òÂǤÁ¡¢Fragment Error ¤¬½Ð¤Ê¤¤ºÇÂç¤Î SIZE ¤òõ¤¹¡Êping -f -l SIZE HOST¡Ë¡£
    ¤³¤ì¤Ë 28 ¤ò²Ã¤¨¤¿Ãͤ¬ Windows ¦¤Î MTU ¤È¤Ê¤ë¡£
    Fragment Error ¤è¤êÀè¤Ë No Response ¤È¤Ê¤Ã¤¿¾ì¹ç¤Ï¡¢Linux ¦¤Î MTU ¤òÂ礭¤¯¤¹¤ë¡£
  3. ¾å¤Çµá¤á¤¿ SIZE ¶áÊդΠping ¤ò Linux ¦¤«¤éÁ÷¿®¤·¡Êhping2 -1 -y -d SIZE HOST¡Ë¡¢¾å¤ÈƱ¤¸ SIZE ¤Þ¤ÇÁ÷¿®¤Ç¤­¤ë¤³¤È¤ò³Îǧ¤¹¤ë¡£
    WindowsXP ¤Î¥Õ¥¡¥¤¥ä¥¦¥©¡¼¥ë¤¬ ON ¤Ë¤Ê¤Ã¤Æ¤¤¤ë¤È¡¢³°Éô¤«¤é¤Î ping ¤Ë±þÅú¤·¤Ê¤¤¡£
    ¡Ö¥³¥ó¥È¥í¡¼¥ë¥Ñ¥Í¥ë¡×¤Î¡Ö¥Õ¥¡¥¤¥ä¥¦¥©¡¼¥ë¡×¤ò³«¤­¡¢¡Ö¾ÜºÙÀßÄê¡×¥¿¥Ö¤Ë¤¢¤ë ICMP ¹àÌܤÎÀßÄê¤ò¹Ô¤¦¡£
    ¤Þ¤¿¡¢hping2 ¤¬Ìµ¤¤¾ì¹ç¤Ï¡¢apt-get install hping2 ¤¹¤ë¡£
  4. Linux ¦¤Î MTU ¤ò¾å¤Çµá¤á¤¿ SIZE¡Ü28 ¶áÊÕ¤ËÊѹ¹¤·¡¢¾åµ­ SIZE ¤Î ping ¤ò Linux ¦¤«¤éÁ÷¿®¤¹¤ë¡£MTU¡áSIZE¡Ü28¤Î»þ¤ËÀ®¸ù¤¹¤ë¤³¤È¤ò³Îǧ¤¹¤ë¡£

Windows ¥É¥é¥¤¥Ð¤Ç 4088 ¤ËÀßÄꤷ¤¿¤È¤­¤Î SIZE ºÇÂçÃÍ¤Ï 4046 ¤Ê¤Î¤Ç¡¢MTU ¤Ï 4074¤È¤Ê¤ê¤Þ¤¹¡£Linux ¦¤«¤é¤â 4046 ¤Î»þ¤Ë¼ÂºÝ¤ÎÁ÷¿®¥Ñ¥±¥Ã¥È¥µ¥¤¥º¤¬ºÇÂç¤È¤Ê¤ê¤Þ¤·¤¿¡£

Server->PC mtu=4088/4074, rwin=8192 samba 90sec (19.38MB/sec)
PC->Server mtu=4088/4074, rwin=8192 samba 108sec (16.15MB/sec)
Server->PC mtu=4088/4088, rwin=8192 samba 90sec (19.38MB/sec)
PC->Server mtu=4088/4088, rwin=8192 samba 126sec (13.84MB/sec)
Server->PC mtu=4088/6000, rwin=8192 samba 94sec (18.60MB/sec)
PC->Server mtu=4088/6000, rwin=8192 samba 115sec (15.20MB/sec)

Server ¦¤Î MTU ¤ò 4088, 6000 ¤Ë¤¹¤ë¤È®ÅÙ¤¬Íî¤Á¤Æ¤¤¤Þ¤¹¤Î¤Ç¡¢mtu=4088/4074 ¤ÏÂÅÅö¤È¸À¤¨¤ë¤Ç¤·¤ç¤¦¡£

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# The primary network interface
allow-hotplug eth0
iface eth0 inet static
        address 192.168.0.2
        netmask 255.255.255.0
        network 192.168.0.0
        broadcast 192.168.0.255
        gateway 192.168.0.254
        # dns-* options are implemented by the resolvconf package, if installed\
        dns-nameservers 192.168.0.254
        dns-search yuzohome.fumo.jp
        # Added by user for jumbo frame
        up ifconfig eth0 mtu 4074

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¼¡¤Ï samba ¤Î¥Ð¥Ã¥Õ¥¡¤ò WindowsXP ¤Î RWIN ÃͤË·¤¨¤Æ¤ß¤Þ¤·¤ç¤¦¡£RWIN ÃÍ¤Ï 16384 ¤È¤«¡¢Windows2000 ¤Ê¤é mtu-40)¡ß12¡¢XP¤Ê¤é mtu-40) ¤ÎÀ°¿ôÇܤ«¤Ä 64kB °ÊÆâ¤ÎºÇÂçÃͤȤ«½ôÀ⤢¤ë¤Î¤Ç¡¢¤Þ¤º¤Ï 16384 ¤«¤é¡£/etc/samba/smb.conf ¤Î socket options ¹Ô¤ò°Ê²¼¤Î¤è¤¦¤ËÊѹ¹¤·¤Þ¤¹¡£

  socket options = TCP_NODELAY SO_RCVBUF=16384 SO_SNDBUF=16384
Server->PC mtu=4088/4074, rwin=16384 samba 91sec (19.16MB/sec)
PC->Server mtu=4088/4074, rwin=16384 samba 91sec (19.16MB/sec)
Server->PC mtu=4088/4088, rwin=16384 samba 85sec (20.51MB/sec)
PC->Server mtu=4088/4088, rwin=16384 samba 90sec (19.38MB/sec)

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¹¹¤Ë mtu-40)¡ß4,8,12,16 ¤ÈÊѹ¹¤·¤Æ¤ß¤Þ¤¹¡£Í½Áۤʤé 64544 ¤¬ºÇ¤â®¤¤¤Ï¤º¤Ç¤¹¤¬¡Ä¡Ä

Server->PC mtu=4088/4074, rwin=16136 samba 93sec (18.80MB/sec)
PC->Server mtu=4088/4074, rwin=16136 samba 91sec (19.16MB/sec)
Server->PC mtu=4088/4074, rwin=32272 samba 91sec (19.16MB/sec)
PC->Server mtu=4088/4074, rwin=32272 samba 88sec (19.81MB/sec)
Server->PC mtu=4088/4074, rwin=48408 samba 91sec (19.16MB/sec)
PC->Server mtu=4088/4074, rwin=48408 samba 88sec (19.81MB/sec)
Server->PC mtu=4088/4074, rwin=64544 samba 91sec (19.16MB/sec)
PC->Server mtu=4088/4074, rwin=64544 samba 86sec (20.27MB/sec)

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Server->PC mtu=4088/4088, rwin=16192 samba 93sec (18.75MB/sec)
PC->Server mtu=4088/4088, rwin=16192 samba Ãæ»ß¤·¤¿¤éÍî¤Á¤¿
Server->PC mtu=9014/4096, rwin=65536 samba 86sec (20.28MB/sec)
PC->Server mtu=9014/4096, rwin=65536 samba 82sec (21.27MB/sec)
Server->PC mtu=9014/4136, rwin=16192 samba Á÷¿®ÅÓÃæ¤Ç¥Ï¥ó¥°¥¢¥Ã¥×

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Server->PC mtu=4088/4074, rwin=16384 samba 90sec (19.38MB/sec)
PC->Server mtu=4088/4074, rwin=16384 samba 89sec (19.59MB/sec)
Server->PC mtu=4088/4074, rwin=32272 samba 90sec (19.38MB/sec)
PC->Server mtu=4088/4074, rwin=32272 samba 83sec (21.01MB/sec)
Server->PC mtu=4088/4074, rwin=64544 samba Á÷¿®ÅÓÃæ¤Ç¥Ï¥ó¥°¥¢¥Ã¥×

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