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$iostat -x 1
Linux 2.6.33-fukai (fukai-laptop) _i686_ (2 CPU)
avg-cpu: %user %nice %system %iowait %steal %idle
5.47 0.50 8.96 48.26 0.00 36.82
Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s avgrq-sz avgqu-sz await svctm %util
sda 6.00 273.00 99.00 7.00 2240.00 2240.00 42.26 1.12 10.57 7.96 84.40
sdb 0.00 4.00 0.00 350.00 0.00 2068.00 5.91 0.55 1.58 0.54 18.80
rrqm/s:
ÿÃë½øÐÐ merge µÄ¶Á²Ù×÷ÊýÄ¿¡£¼´ delta(rmerge)/s
wrqm/s:
ÿÃë½øÐÐ merge µÄд²Ù×÷ÊýÄ¿¡£¼´ delta(wmerge)/s
r/s:
ÿÃëÍê³ÉµÄ¶Á I/O É豸´ÎÊý¡£¼´ delta(rio)/s
w/s:
ÿÃëÍê³ÉµÄд I/O É豸´ÎÊý¡£¼´ delta(wio)/s
rsec/s:
ÿÃë¶ÁÉÈÇøÊý¡£¼´ delta(rsect)/s
wsec/s:
ÿÃëдÉÈÇøÊý¡£¼´ delta(wsect)/s
rkB/s:
ÿÃë¶ÁK×Ö½ÚÊý¡£ÊÇ rsect/s µÄÒ»°ë£¬ÒòΪÿÉÈÇø´óСΪ512×Ö½Ú¡£(ÐèÒª¼ÆËã)
wkB/s:
ÿÃëдK×Ö½ÚÊý¡£ÊÇ wsect/s µÄÒ»°ë¡£(ÐèÒª¼ÆËã)
avgrq-sz:
ƽ¾ùÿ´ÎÉ豸I/O²Ù×÷µÄÊý¾Ý´óС
(ÉÈÇø)¡£delta(rsect+wsect)/delta(rio+wio)
avgqu-sz:
ƽ¾ùI/O¶ÓÁг¤¶È¡£¼´ delta(aveq)/s/1000
(ÒòΪaveqµÄµ¥Î»ÎªºÁÃë)¡£
await:
ƽ¾ùÿ´ÎÉ豸I/O²Ù×÷µÄµÈ´ýʱ¼ä (ºÁÃë)¡£¼´
delta(ruse+wuse)/delta(rio+wio)
svctm:
ƽ¾ùÿ´ÎÉ豸I/O²Ù×÷µÄ·þÎñʱ¼ä (ºÁÃë)¡£¼´
delta(use)/delta(rio+wio)
%util:
Ò»ÃëÖÐÓаٷÖÖ®¶àÉÙµÄʱ¼äÓÃÓÚ I/O ²Ù×÷£¬»òÕß˵һÃëÖÐÓжàÉÙʱ¼ä I/O
¶ÓÁÐÊǷǿյġ£¼´ delta(use)/s/1000 (ÒòΪuseµÄµ¥Î»ÎªºÁÃë)
Èç¹û %util ½Ó½ü 100%£¬ËµÃ÷²úÉúµÄI/OÇëÇóÌ«¶à£¬I/OϵͳÒѾÂú¸ººÉ£¬¸Ã´ÅÅÌ
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idleСÓÚ70% IOѹÁ¦¾Í½Ï´óÁË,Ò»°ã¶ÁÈ¡ËÙ¶ÈÓн϶àµÄwait.
ͬʱ¿ÉÒÔ½áºÏvmstat ²é¿´²é¿´b²ÎÊý(µÈ´ý×ÊÔ´
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2009 Äê 4 ÔÂ 23 ÈÕ
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Linux ƽ̨ÉϵĶàÏ̳߳ÌÐò¿ª·¢Ïà¶ÔÓ¦ÆäËûƽ̨£¨±ÈÈç Windows£©µÄ¶àÏß³Ì API ÓÐһЩϸ΢ ......
general setup
---> enable deprecated sysfs features which may confuse old
userspace tools
insmod: error inserting '/lib/dm-region-hash.ko' : -1 File exists
½â¾ö
cp /boot/initrd-2.6.x.img /tmp
cd /tmp
mkdir newinitrd
cd newinitrd/
zcat ../initrd-2.6.x.img |cpio -i
ÏÂ ......
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1.ʲôÊÇlinux¿â
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2 selectµÄµÚÒ»¸ö²ÎÊýΪËùÓмàÊÓµÄÎļþÃèÊö·ûµÄ×î´óÖµ+1£¬¶ø²»ÊǼàÊÓµÄÎļþÃèÊö·û¸öÊý+1¡£
3 ²»Òª¼àÊÓÄÇЩ¾³£¿ÉÓ ......
LINUX--ÐÞ¸ÄIPµØÖ·
A¡¢ÐÞ¸ÄipµØÖ·
¼´Ê±ÉúЧ:
# ifconfig eth0 192.168.0.20 netmask 255.255.255.0
Æô¶¯ÉúЧ:
ÐÞ¸Ä/etc/sysconfig/network-scripts/ifcfg-eth0
B¡¢ÐÞ¸Ädefault gateway
¼´Ê±ÉúЧ:
# route add default gw 192.168.0.254
Æô¶¯ÉúЧ:
ÐÞ¸Ä/etc/sysconfig/network-scripts/ifcfg-eth0
C¡¢ÐÞ¸Ädns
ÐÞ ......