挺有意思的HBase日志+Splunk

如题，转载自：

http://hi.baidu.com/harry_lime/item/10cf2c174853c7ea39cb3042

如何模拟拔盘操作

Linux has a nifty way of allowing disk state modification via /sys/ interface. Very useful when debugging LVM mirroring, disk disaster recovery etc.

To put a SATA disk offline/running:

echo offline > /sys/block/sda/device/state
echo running > /sys/block/sda/device/state


To delete a device (for unplugging):

echo 1 > /sys/block/sda/device/delete

To scan for new devices (hotplugging):
echo "0 0 0" >/sys/class/scsi_host/host/scan

MySQL update多行

http://soulwan.com/一条语句update多行记录/

http://blog.mozilla.org/data/2011/03/22/how-glow-mozilla-org-gets-its-data/