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From Brandon Freeman <brandon.free...@explorys.com>
Subject Re: umount bad disk
Date Thu, 13 Feb 2014 18:32:27 GMT
LiuLei,

Using your example you can run  umount -l /disk10 ( Lower case L ) on the disk and it will
lazy dismount and will not wait for a disconnect.

Thanks,

---
Brandon Freeman
System Engineer
Explorys, Inc.
8501 Carnegie Ave., Suite 200
Cleveland, OH 44106
http://www.explorys.com<http://www.explorys.com/> | 216-235-5021

From: Arpit Agarwal <aagarwal@hortonworks.com<mailto:aagarwal@hortonworks.com>>
Reply-To: "user@hadoop.apache.org<mailto:user@hadoop.apache.org>" <user@hadoop.apache.org<mailto:user@hadoop.apache.org>>
Date: Thursday, February 13, 2014 12:09 PM
To: "user@hbase.apache.org<mailto:user@hbase.apache.org>" <user@hbase.apache.org<mailto:user@hbase.apache.org>>
Subject: Fwd: umount bad disk

bcc'ed hadoop-user

Lei, perhaps hbase-user can help.

---------- Forwarded message ----------
From: lei liu <liulei412@gmail.com<mailto:liulei412@gmail.com>>
Date: Thu, Feb 13, 2014 at 1:04 AM
Subject: umount bad disk
To: user@hadoop.apache.org<mailto:user@hadoop.apache.org>


I use HBase0.96 and CDH4.3.1.

I use Short-Circuit Local Read:

<property>
  <name>dfs.client.read.shortcircuit</name>
  <value>true</value></property><property>
  <name>dfs.domain.socket.path</name>
  <value>/home/hadoop/cdh4-dn-socket/dn_socket</value></property>


When one disk is bad, because the RegionServer open some file on the disk, so I don't run
"umount", example:
sudo umount -f /disk10
umount2: Device or resource busy


umount: /disk10: device is busy
umount2: Device or resource busy
umount: /disk10: device is busy


I must stop RegionServer in order to run umount command.



How can don't stop RegionServer and delete the bad disk.


Thanks,


LiuLei









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