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From: <Yuling_C@DELL.com>
To: <user@hbase.apache.org>
Date: Fri, 15 Mar 2013 18:50:44 -0500
Subject: RE: hbase time skew
Thread-Topic: hbase time skew
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 Hi Ted,=20

For the source code below, what's the unit of 30000? Is the maxSkew 30 seco=
nds?  Also, what does Hbase do when the time skew exeeds 10 seconds and 30 =
seconds? Are these two values configurable?

Thanks,

YuLing
>maxSkew =3D c.getLong("hbase.master.maxclockskew", 30000);
>     warningSkew =3D c.getLong("hbase.master.warningclockskew", 10000);=20
> ./src/main/java/org/apache/hadoop/hbase/master/ServerManager.java


-----Original Message-----
From: Ted Yu [mailto:yuzhihong@gmail.com]=20
Sent: Friday, March 15, 2013 4:28 PM
To: user@hbase.apache.org
Subject: Re: hbase time skew

Please upgrade to 0.94.5, if possible.

There have been a lot of bug fixes and performance improvements since 0.94.=
1.

On Fri, Mar 15, 2013 at 4:26 PM, <Yuling_C@dell.com> wrote:

> Yes, I'm using 0.94.1.
>
> -----Original Message-----
> From: Ted Yu [mailto:yuzhihong@gmail.com]
> Sent: Friday, March 15, 2013 3:53 PM
> To: user@hbase.apache.org
> Subject: Re: hbase time skew
>
> Are you using 0.94.x ?
>
> If so, see the following:
>
>     maxSkew =3D c.getLong("hbase.master.maxclockskew", 30000);
>     warningSkew =3D c.getLong("hbase.master.warningclockskew", 10000);=20
> ./src/main/java/org/apache/hadoop/hbase/master/ServerManager.java
>
> Cheers
>
> On Fri, Mar 15, 2013 at 3:49 PM, <Yuling_C@dell.com> wrote:
>
> > Hi,
> >
> > We recently encountered the issue that HBase tables got into a state=20
> > that was not disabled nor enabled. We found that the root cause was=20
> > the linux clock skewed more than 5 hours. I googled and understood=20
> > that hbase can only  handle about a couple of seconds time skew. We=20
> > were wondering if there's any configuration in HBase that we can do=20
> > so as to increase the number of seconds that hbase could handle?
> >
> > Thanks very much,
> >
> > YuLing
> >
>