Home | About | Sematext search-lucene.com search-hadoop.com
 Search Hadoop and all its subprojects:

Switch to Plain View
HBase, mail # user - reginoserver's log analysis?


+
hua beatls 2013-01-03, 09:45
+
Anoop Sam John 2013-01-03, 10:23
+
hua beatls 2013-01-03, 12:11
+
Anoop Sam John 2013-01-03, 12:37
+
hua beatls 2013-01-03, 16:21
Copy link to this message
-
Re: reginoserver's log analysis?
ramkrishna vasudevan 2013-01-03, 16:24
You need to see your application to see how much is your rate of puts.
 Also how many column families do you have?
All these factors will help you in determining your memstore size.

Regards
Ram

On Thu, Jan 3, 2013 at 9:51 PM, hua beatls <[EMAIL PROTECTED]> wrote:

> HI,
>    what i mean is shoud we increate the memstore according to this log?
>
>    Thanks!
>
>    beatls.
>
> On Thu, Jan 3, 2013 at 8:37 PM, Anoop Sam John <[EMAIL PROTECTED]> wrote:
>
> >
> > I guess you mean  "what is blocking memstore size"
> > This you can configure using 2 properties.
> > 1. hbase.hregion.memstore.flush.size -> Using this you specify when the
> > memstore to be flushed as a file. The default value is 128MB. So when the
> > region memstore size reaches this value a flush will be initiated.
> > 2. hbase.hregion.memstore.block.multiplier -> deafult value is 2
> > The blocking memstore size is calculated as flushSize multiplied by this
> >  multiplier.  So the default value will be 256MB.
> > What value to set depends on the total memory available for the process
> in
> > the RegionServers and the total no# of regions per server.
> > Say you set this blocking size as 512m and there can be 100 regions per
> > region server in your cluster, then you are *possibly allowing* a total
> > memory of 512*100 mb for the memstores alone. [RS process will not other
> > memory also for its normal operation].  Take care of these aspects when
> you
> > design
> >
> > -Anoop-
> >
> > ________________________________________
> > From: hua beatls [[EMAIL PROTECTED]]
> > Sent: Thursday, January 03, 2013 5:41 PM
> > To: [EMAIL PROTECTED]
> > Subject: Re: reginoserver's log analysis?
> >
> > HI,
> >     what is the block size? how to set it ?  and shoud i increate it for
> > the memstore ?
> >
> >     Thanks!
> >      beatls
> >
> > On Thu, Jan 3, 2013 at 6:23 PM, Anoop Sam John <[EMAIL PROTECTED]>
> wrote:
> >
> > > The writes to your table will be written 1st to in memory data
> structure
> > > (memstore). When this memstore reaches some defined size it will be
> > flushed
> > > into the file system and the memory can be cleared.
> > >
> > > The flush operation may take some time as IO write is involved, During
> > > this time also the client may be writing data to the table. Well HBase
> > > allows to do so and the data there in memory for a region can be
> becoming
> > > more and more. So there will be a max amount of total data which can be
> > > there in memory. If that is crossed HBase will stop taking any writes
> > from
> > > the client until the flush is over and the memory got cleared.  As per
> > the
> > > log in your cluster the blocking memstore size is 256m.
> > >
> > > Hope you got the idea.
> > >
> > > -Anoop-
> > > ________________________________________
> > > From: hua beatls [[EMAIL PROTECTED]]
> > > Sent: Thursday, January 03, 2013 3:15 PM
> > > To: [EMAIL PROTECTED]
> > > Subject: reginoserver's log analysis?
> > >
> > > Hi,
> > >    below is the regionserver's log, what does  the red marked "blocking
> > > updates" mean ?
> > >     any indication from " memstore size 256.8m is >= than blocking
> 256.0m
> > > size"
> > >
> > >
> > >
> > > 42,651 INFO org.apache.hadoop.hbase.regionserver.HRegion: Blocking
> > > updatesfor 'IPC Server handler 1 on 60020' on region
> > >
> > >
> >
> BT_NET_LOG_999,0000189020000000000000000000000000000000,1357201912899.efd6fd4581483aded26175300c48b7b7.:
> > > memstore size 256.8m is >= than blocking 256.0m size
> > >
> > > 2013-01-03 17:00:42,717 INFO
> > > org.apache.hadoop.hbase.regionserver.HRegion: Blocking
> > > updates for 'IPC Server handler 27 on 60020' on region
> > >
> > >
> >
> BT_NET_LOG_999,0000189020000000000000000000000000000000,1357201912899.efd6fd4581483aded26175300c48b7b7.:
> > > memstore size 256.8m is >= than blocking 256.0m size
> > >
> > > 2013-01-03 17:00:42,761 INFO
> > org.apache.hadoop.hbase.regionserver.HRegion:
> > > Blocking updates for 'IPC Server handler 50 on 60020' on region
+
Asaf Mesika 2013-01-03, 17:37
+
hua beatls 2013-01-03, 18:25
+
Bryan Beaudreault 2013-01-03, 18:32
+
hua beatls 2013-01-03, 20:28