Return-Path: X-Original-To: apmail-cassandra-user-archive@www.apache.org Delivered-To: apmail-cassandra-user-archive@www.apache.org Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by minotaur.apache.org (Postfix) with SMTP id 6A30AD687 for ; Thu, 11 Oct 2012 15:31:43 +0000 (UTC) Received: (qmail 23540 invoked by uid 500); 11 Oct 2012 15:31:40 -0000 Delivered-To: apmail-cassandra-user-archive@cassandra.apache.org Received: (qmail 23512 invoked by uid 500); 11 Oct 2012 15:31:40 -0000 Mailing-List: contact user-help@cassandra.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: user@cassandra.apache.org Delivered-To: mailing list user@cassandra.apache.org Received: (qmail 23495 invoked by uid 99); 11 Oct 2012 15:31:40 -0000 Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136) by apache.org (qpsmtpd/0.29) with ESMTP; Thu, 11 Oct 2012 15:31:40 +0000 X-ASF-Spam-Status: No, hits=2.6 required=5.0 tests=HTML_MESSAGE,RCVD_IN_DNSWL_LOW,SPF_PASS,TRACKER_ID X-Spam-Check-By: apache.org Received-SPF: pass (athena.apache.org: domain of arodrime@gmail.com designates 209.85.217.172 as permitted sender) Received: from [209.85.217.172] (HELO mail-lb0-f172.google.com) (209.85.217.172) by apache.org (qpsmtpd/0.29) with ESMTP; Thu, 11 Oct 2012 15:31:36 +0000 Received: by mail-lb0-f172.google.com with SMTP id k13so1548912lbo.31 for ; Thu, 11 Oct 2012 08:31:14 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :content-type; bh=93YWu04znK4wJwocBbWlJYygwNDPQQLrAeJaF6bpUYA=; b=jGMXBt7QroezJNV+Xl6e9eimqv0hyuFut0P0huVULT1+dH0Uf+qL5lTlFcCQ1MoGNR toU/jqqnZVV1eW2lS/tAvz3qAhi9/7manlvOJGUHFg1Xb+gymwSc83R3sOSrkwZLdtAQ 0Mh5P5lgBrs8Bj2pvsY9MxIedD3fH1U/36ZX1ziMy6RydeiUWnRz+PCQ1FidbMvPVC5J 8xRg7GgDl5wCVY5ZQDolfK1Wdxq0b+AFLEp8YtQ+c0o/LBHvPTuVBkXOz12zkc2teSJk NdbcUZykZemYNjZoxIe8Ph4WkKrK7JDX1JE2KugAmhciCTsGqKkwML/Rjcrg7U0Qk3c/ E90Q== Received: by 10.152.104.240 with SMTP id gh16mr1088694lab.56.1349969474094; Thu, 11 Oct 2012 08:31:14 -0700 (PDT) MIME-Version: 1.0 Received: by 10.114.12.193 with HTTP; Thu, 11 Oct 2012 08:30:53 -0700 (PDT) In-Reply-To: <2C85E14562B39345BCCAD90B8E7955C91FCD2B@DKEXC002.adform.com> References: <2C85E14562B39345BCCAD90B8E7955C91FCC9B@DKEXC002.adform.com> <2C85E14562B39345BCCAD90B8E7955C91FCD2B@DKEXC002.adform.com> From: Alain RODRIGUEZ Date: Thu, 11 Oct 2012 17:30:53 +0200 Message-ID: Subject: Re: unbalanced ring To: user@cassandra.apache.org Content-Type: multipart/related; boundary=f46d04088e11f6057604cbca42de X-Virus-Checked: Checked by ClamAV on apache.org --f46d04088e11f6057604cbca42de Content-Type: multipart/alternative; boundary=f46d04088e11f6057304cbca42dd --f46d04088e11f6057304cbca42dd Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable @Tamar Bad effects are : 1 - Disabling for a *long* time your minor compactions (they need SSTable about the same size to be triggered). 2 - High cpu load during the compaction (which can be quite long). Good effects : 1 - Reduce the size of your data. 2 - Boost read performances. @B. Todd Burruss What can we do if cleanup doesn't remove any data and so doesn't balance the data partition ? We both have well balanced ring and unbalanced data... Alain 2012/10/11 Viktor Jevdokimov > In our case, we use TTL and need to keep amount of data as low as > possible to fit RAM, so data have to be deleted somehow.**** > > While SSTables are growing, largest will wait long time for minor > compaction, so we do major compaction every night.**** > > ** ** > > ** ** > Best regards / Pagarbiai > *Viktor Jevdokimov* > Senior Developer > > Email: Viktor.Jevdokimov@adform.com > Phone: +370 5 212 3063, Mobile: +370 650 19588, Fax +370 5 261 0453 > J. Jasinskio 16C, LT-01112 Vilnius, Lithuania > Follow us on Twitter: @adforminsider > What is Adform: watch this short video > [image: Adform News] > * * > *Visit us at* IAB RTB workshop > October 11, 4 pm in Sala Rossa > [image: iab forum] > > > Disclaimer: The information contained in this message and attachments is > intended solely for the attention and use of the named addressee and may = be > confidential. If you are not the intended recipient, you are reminded tha= t > the information remains the property of the sender. You must not use, > disclose, distribute, copy, print or rely on this e-mail. If you have > received this message in error, please contact the sender immediately and > irrevocably delete this message and any copies. > > *From:* Tamar Fraenkel [mailto:tamar@tok-media.com] > *Sent:* Thursday, October 11, 2012 10:57 > > *To:* user@cassandra.apache.org > *Subject:* Re: unbalanced ring**** > > ** ** > > Hi! > All that left me confused... > like Alain, I read DataStax wanings. Now Victor says it is possible > without bad effects. > 1. Under what conditions would you recommend major compaction? > 2. If I do go that route, would I have to run periodic / nightly > compactions from now on? > 3. What will be the price of #2? > Thanks, > > **** > > *Tamar Fraenkel * > Senior Software Engineer, TOK Media **** > > [image: Inline image 1]**** > > > tamar@tok-media.com > Tel: +972 2 6409736 > Mob: +972 54 8356490 > Fax: +972 2 5612956 **** > > ** ** > > ** ** > > > > **** > > On Thu, Oct 11, 2012 at 8:41 AM, Viktor Jevdokimov < > Viktor.Jevdokimov@adform.com> wrote:**** > > To run, or not to run? All this depends on use case. There=92re no proble= ms > running major compactions (we do it nightly) in one case, there could be > problems in another. Just need to understand, how everything works.**** > > **** > > **** > > Best regards / Pagarbiai**** > > *Viktor Jevdokimov***** > > Senior Developer**** > > ** ** > > Email: Viktor.Jevdokimov@adform.com**** > > Phone: +370 5 212 3063, Mobile: +370 650 19588, Fax +370 5 261 0453**** > > J. Jasinskio 16C, LT-01112 Vilnius, Lithuania**** > > Follow us on Twitter: @adforminsider > **** > > What is Adform: watch this short video *= * > ** > > [image: Adform News] **** > > * * **** > > *Visit us at* IAB RTB workshop **** > > October 11, 4 pm in Sala Rossa **** > > [image: iab forum] > **** > > > Disclaimer: The information contained in this message and attachments is > intended solely for the attention and use of the named addressee and may = be > confidential. If you are not the intended recipient, you are reminded tha= t > the information remains the property of the sender. You must not use, > disclose, distribute, copy, print or rely on this e-mail. If you have > received this message in error, please contact the sender immediately and > irrevocably delete this message and any copies. **** > > ** ** > > *From:* Alain RODRIGUEZ [mailto:arodrime@gmail.com] > *Sent:* Thursday, October 11, 2012 09:17 > *To:* user@cassandra.apache.org > *Subject:* Re: unbalanced ring**** > > **** > > Tamar be carefull. Datastax doesn't recommand major compactions in > production environnement.**** > > **** > > If I got it right, performing major compaction will convert all your > SSTables into a big one, improving substantially your reads performence, = at > least for a while... The problem is that will disable minor compactions t= oo > (because of the difference of size between this SSTable and the new ones, > if I remeber well). So your reads performance will decrease until your > others SSTable reach the size of this big one you've created or until you > run an other major compaction, transforming them into a maintenance norma= l > process like repair is.**** > > **** > > But, knowing that, I still don't know if we both (Tamar and I) shouldn't > run it anyway (In my case it will greatly decrease the size of my data 1= 33 > GB -> 35GB and maybe load the cluster evenly...)**** > > **** > > Alain**** > > **** > > 2012/10/10 B. Todd Burruss **** > > it should not have any other impact except increased usage of system > resources.**** > > **** > > and i suppose, cleanup would not have an affect (over normal compaction) > if all nodes contain the same data**** > > **** > > On Wed, Oct 10, 2012 at 12:12 PM, Tamar Fraenkel > wrote:**** > > Hi! > Apart from being heavy load (the compact), will it have other effects? > Also, will cleanup help if I have replication factor =3D number of nodes? > Thanks**** > > > **** > > *Tamar Fraenkel * > Senior Software Engineer, TOK Media **** > > [image: Inline image 1]**** > > > tamar@tok-media.com > Tel: +972 2 6409736 > Mob: +972 54 8356490 > Fax: +972 2 5612956 **** > > **** > > **** > > ** ** > > On Wed, Oct 10, 2012 at 6:12 PM, B. Todd Burruss wrote= : > **** > > major compaction in production is fine, however it is a heavy operation o= n > the node and will take I/O and some CPU.**** > > **** > > the only time i have seen this happen is when i have changed the tokens i= n > the ring, like "nodetool movetoken". cassandra does not auto-delete data > that it doesn't use anymore just in case you want to move the tokens agai= n > or otherwise "undo".**** > > **** > > try "nodetool cleanup"**** > > **** > > On Wed, Oct 10, 2012 at 2:01 AM, Alain RODRIGUEZ > wrote:**** > > Hi,**** > > **** > > Same thing here: **** > > **** > > 2 nodes, RF =3D 2. RCL =3D 1, WCL =3D 1.**** > > Like Tamar I never ran a major compaction and repair once a week each nod= e. > **** > > **** > > 10.59.21.241 eu-west 1b Up Normal 133.02 GB > 50.00% 0**** > > 10.58.83.109 eu-west 1b Up Normal 98.12 GB > 50.00% 85070591730234615865843651857942052864**** > > **** > > What phenomena could explain the result above ?**** > > **** > > By the way, I have copy the data and import it in a one node dev cluster. > There I have run a major compaction and the size of my data has been > significantly reduced (to about 32 GB instead of 133 GB). **** > > **** > > How is that possible ?**** > > Do you think that if I run major compaction in both nodes it will balance > the load evenly ?**** > > Should I run major compaction in production ?**** > > **** > > 2012/10/10 Tamar Fraenkel **** > > Hi! > I am re-posting this, now that I have more data and still *unbalanced rin= g > *: > > 3 nodes, > RF=3D3, RCL=3DWCL=3DQUORUM**** > > > > Address DC Rack Status State Load > Owns Token > > 113427455640312821154458202477256070485**** > > x.x.x.x us-east 1c Up Normal 24.02 GB 33.33% = 0 > y.y.y.y us-east 1c Up Normal 33.45 GB 33.33% > 56713727820156410577229101238628035242 > z.z.z.z us-east 1c Up Normal 29.85 GB 33.33% > 113427455640312821154458202477256070485 > > repair runs weekly. > I don't run nodetool compact as I read that this may cause the minor > regular compactions not to run and then I will have to run compact > manually. Is that right? > > Any idea if this means something wrong, and if so, how to solve?**** > > > > Thanks,**** > > * > Tamar Fraenkel * > Senior Software Engineer, TOK Media **** > > [image: Inline image 1]**** > > > tamar@tok-media.com > Tel: +972 2 6409736 > Mob: +972 54 8356490 > Fax: +972 2 5612956 **** > > **** > > **** > > ** ** > > On Tue, Mar 27, 2012 at 9:12 AM, Tamar Fraenkel > wrote:**** > > Thanks, I will wait and see as data accumulates.**** > > Thanks,**** > > > **** > > *Tamar Fraenkel * > Senior Software Engineer, TOK Media **** > > [image: Inline image 1]**** > > > tamar@tok-media.com > Tel: +972 2 6409736 > Mob: +972 54 8356490 > Fax: +972 2 5612956 **** > > **** > > **** > > ** ** > > On Tue, Mar 27, 2012 at 9:00 AM, R. Verlangen wrote:**** > > Cassandra is built to store tons and tons of data. In my opinion roughly = ~ > 6MB per node is not enough data to allow it to become a fully balanced > cluster.**** > > **** > > 2012/3/27 Tamar Fraenkel **** > > This morning I have**** > > nodetool ring -h localhost**** > > Address DC Rack Status State Load > Owns Token**** > > > 113427455640312821154458202477256070485**** > > 10.34.158.33 us-east 1c Up Normal 5.78 MB > 33.33% 0**** > > 10.38.175.131 us-east 1c Up Normal 7.23 MB > 33.33% 56713727820156410577229101238628035242**** > > 10.116.83.10 us-east 1c Up Normal 5.02 MB > 33.33% 113427455640312821154458202477256070485**** > > **** > > Version is 1.0.8.**** > > **** > > **** > > *Tamar Fraenkel * > Senior Software Engineer, TOK Media **** > > [image: Inline image 1]**** > > > tamar@tok-media.com > Tel: +972 2 6409736 > Mob: +972 54 8356490 > Fax: +972 2 5612956 **** > > **** > > **** > > ** ** > > On Tue, Mar 27, 2012 at 4:05 AM, Maki Watanabe > wrote:**** > > What version are you using?**** > > Anyway try nodetool repair & compact.**** > > **** > > maki**** > > **** > > 2012/3/26 Tamar Fraenkel **** > > Hi!**** > > I created Amazon ring using datastax image and started filling the db.***= * > > The cluster seems un-balanced.**** > > **** > > nodetool ring returns:**** > > Address DC Rack Status State Load > Owns Token**** > > > 113427455640312821154458202477256070485**** > > 10.34.158.33 us-east 1c Up Normal 514.29 KB > 33.33% 0**** > > 10.38.175.131 us-east 1c Up Normal 1.5 MB > 33.33% 56713727820156410577229101238628035242**** > > 10.116.83.10 us-east 1c Up Normal 1.5 MB > 33.33% 113427455640312821154458202477256070485**** > > **** > > [default@tok] describe;**** > > Keyspace: tok:**** > > Replication Strategy: org.apache.cassandra.locator.SimpleStrategy**** > > Durable Writes: true**** > > Options: [replication_factor:2]**** > > **** > > [default@tok] describe cluster;**** > > Cluster Information:**** > > Snitch: org.apache.cassandra.locator.Ec2Snitch**** > > Partitioner: org.apache.cassandra.dht.RandomPartitioner**** > > Schema versions:**** > > 4687d620-7664-11e1-0000-1bcb936807ff: [10.38.175.131, > 10.34.158.33, 10.116.83.10]**** > > **** > > **** > > Any idea what is the cause?**** > > I am running similar code on local ring and it is balanced.**** > > **** > > How can I fix this?**** > > **** > > Thanks,**** > > > **** > > *Tamar Fraenkel * > Senior Software Engineer, TOK Media **** > > [image: Inline image 1]**** > > > tamar@tok-media.com > Tel: +972 2 6409736 > Mob: +972 54 8356490 > Fax: +972 2 5612956 **** > > **** > > **** > > **** > > **** > > **** > > > > **** > > **** > > -- > With kind regards,**** > > **** > > Robin Verlangen**** > > www.robinverlangen.nl**** > > **** > > **** > > **** > > **** > > **** > > **** > > **** > > **** > > ** ** > --f46d04088e11f6057304cbca42dd Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: quoted-printable @Tamar

Bad effects are :=A0

1 - = Disabling for a *long* time your minor compactions (they need SSTable about= the same size to be triggered).
2 - High cpu load during the com= paction (which can be quite long).

Good effects :

1 - Reduce= the size of your data.
2 - Boost read performances.
<= div>
@B. Todd Burruss

What can we do= if cleanup doesn't remove any data and so doesn't balance the data= partition ?
We both have well balanced ring and unbalanced data...

<= /div>
Alain

2012/10= /11 Viktor Jevdokimov <Viktor.Jevdokimov@adform.com>

In our case, we use TTL a= nd need to keep amount of data as low as possible to fit RAM, so data have = to be deleted somehow.

While SSTables are growin= g, largest will wait long time for minor compaction, so we do major compact= ion every night.

=A0<= /p>

=A0<= /p>

Best regards / Pagarbiai
Viktor Jevdokimov
Senior Developer

Phone: +370 5 212 3063, Mobile: +370 650 19588, Fax <= a href=3D"tel:%2B370%205%20261%200453" value=3D"+37052610453" target=3D"_bl= ank">+370 5 261 0453
J. Jasinskio 16C, LT-01112 Vilnius, Lithuania
Follow us on Twitter: @adforminsider
=A0 =A0
Visit us at IAB RTB workshop
October 11, 4 pm in Sala Rossa

Disclaimer: The information contained in this message and attachments is in= tended solely for the attention and use of the named addressee and may be c= onfidential. If you are not the intended recipient, you are reminded that t= he information remains the property of the sender. You must not use, disclose, distribute, copy, print or rely= on this e-mail. If you have received this message in error, please contact= the sender immediately and irrevocably delete this message and any copies.

From: Tamar Fr= aenkel [mailto:tam= ar@tok-media.com]
Sent: Thursday, October 11, 2012 10:57


To: u= ser@cassandra.apache.org
Subject: Re: unbalanced ring

=A0

Hi!
All that left me confused...
like Alain, I read DataStax wanings. Now Victor says it is possible without= bad effects.
1. Under what conditions would you recommend major compaction?
2. If I do go that route, would I have to run periodic / nightly compaction= s from now on?
3. What will be the price of #2?
Thanks,

Tamar Fraenkel=A0<= /b>
Senior Software Engineer, TOK Media=A0

3D"Inline


tamar@tok-media.co= m
Tel:=A0=A0=A0+972 2 6409736=A0
Mob:=A0=A0+972 54 8356490=A0
Fax:=A0=A0=A0+972 2 5612956=A0

=A0

=A0



On Thu, Oct 11, 2012 at 8:41 AM, Viktor Jevdokimov &= lt;Viktor= .Jevdokimov@adform.com> wrote:

To run, or not to run? Al= l this depends on use case. There=92re no problems running major compaction= s (we do it nightly) in one case, there could be problems in another. Just n= eed to understand, how everything works.

=A0<= /p>

=A0<= /p>

Best regards / Pagarbiai

Viktor Jevdokimov

Senior Developer

=A0

J. Jasinskio 16C, LT-01112 Vilnius, Lithuania=

What is Adform: watch this short video

=A0 =A0

Visit us at IAB RTB workshop

October 11, 4 pm in Sala Rossa

3D"iab


Disclaimer: The information contained in this message and attachments is in= tended solely for the attention and use of the named addressee and may be c= onfidential. If you are not the intended recipient, you are reminded that t= he information remains the property of the sender. You must not use, disclose, distribute, copy, print or rely= on this e-mail. If you have received this message in error, please contact= the sender immediately and irrevocably delete this message and any copies.

=A0

From: Alain RO= DRIGUEZ [mailto:aro= drime@gmail.com]
Sent: Thursday, October 11, 2012 09:17
To: u= ser@cassandra.apache.org
Subject: Re: unbalanced ring

=A0

Tamar be carefull. Datastax doesn't recommand ma= jor compactions in production environnement.

=A0

If I got it right, performing major compaction will = convert all your SSTables into a big one, improving substantially your read= s performence, at least for a while... The problem is that will disable minor compactions too (because of the difference of s= ize between this SSTable and the new ones, if I remeber well). So your read= s=A0performance=A0will decrease until your others SSTable reach the size of= this big one you've created or until you run an other major compaction, transforming them into a maintenance no= rmal process like repair is.

=A0

But, knowing that, I still don't know if we both= (Tamar and I) shouldn't run it anyway (In my case it will greatly decr= ease the size of my data =A0133 GB -> 35GB and maybe load the cluster evenly...)

=A0

Alain

=A0

2012/10/10 B. Todd Burruss <btoddb@gmail.com>

it should not have any other impact except increased= usage of system resources.

=A0

and i suppose, cleanup would not have an affect (ove= r normal compaction) if all nodes contain the same data

=A0

On Wed, Oct 10, 2012 at 12:12 PM, Tamar Fraenkel <= ;tamar@tok-media.c= om> wrote:

Hi!
Apart from being heavy load (the compact), will it have other effects?
Also, will cleanup help if I have replication factor =3D number of nodes? Thanks


Tamar Fraenkel=A0<= /b>
Senior Software Engineer, TOK Media=A0

3D"Inline


tamar@tok-media.co= m
Tel:=A0=A0=A0+972 2 = 6409736=A0
Mob:=A0=A0+972 54 8= 356490=A0
Fax:=A0=A0=A0+972 2 = 5612956=A0

=A0

=A0

=A0

On Wed, Oct 10, 2012 at 6:12 PM, B. Todd Burruss <= ;btoddb@gmail.com= > wrote:

major compaction in production is fine, however it i= s a heavy operation on the node and will take I/O and some CPU.

=A0

the only time i have seen this happen is when i have= changed the tokens in the ring, like "nodetool movetoken". =A0ca= ssandra does not auto-delete data that it doesn't use anymore just in case you want to move the tokens again or otherwise "undo&quo= t;.

=A0

try "nodetool cleanup"

=A0

On Wed, Oct 10, 2012 at 2:01 AM, Alain RODRIGUEZ <= ;arodrime@gmail.com= > wrote:

Hi,

=A0

Same thing here:=A0

=A0

2 nodes, RF =3D 2. RCL =3D 1, WCL =3D 1.

Like Tamar I never ran a major compaction=A0and repa= ir once a week each node.

=A0

10.59.21.241 =A0 =A0eu-west =A0 =A0 1b =A0 =A0 =A0 = =A0 =A0Up =A0 =A0 Normal =A0133.02 GB =A0 =A0 =A0 50.00% =A0 =A0 =A0 =A0 = =A0 =A0 =A00

10.58.83.109 =A0 =A0eu-west =A0 =A0 1b =A0 =A0 =A0 = =A0 =A0Up =A0 =A0 Normal =A098.12 GB =A0 =A0 =A0 =A050.00% =A0 =A0 =A0 =A0 = =A0 =A0 =A085070591730234615865843651857942052864

=A0

What phenomena could explain the result above ?

=A0

By the way, I have copy the data and import it in a = one node dev cluster. There I have run a major compaction and the size of m= y data has been significantly reduced (to about 32 GB instead of 133 GB).=A0

=A0

How is that possible ?

Do you think that if I run major compaction in both = nodes it will balance the load evenly ?

Should I run major compaction in production ?=

=A0

2012/10/10 Tamar Fraenkel <tamar@tok-media.com>

Hi!
I am re-posting this, now that I have more data and still unbalanced rin= g:

3 nodes,
RF=3D3, RCL=3DWCL=3DQUORUM



Address=A0=A0=A0=A0=A0=A0=A0=A0 DC=A0=A0=A0=A0=A0=A0=A0=A0=A0 Rack=A0=A0=A0= =A0=A0=A0=A0 Status State=A0=A0 Load=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 Owns= =A0=A0=A0 Token
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0 113427455640312821154458202477256070485

x.x.x.x =A0=A0 us-east=A0=A0=A0=A0 1c=A0=A0=A0=A0=A0= =A0=A0=A0=A0 Up=A0=A0=A0=A0 Normal=A0 24.02 GB=A0=A0=A0=A0=A0=A0=A0 33.33%= =A0 0
y.y.y.y =A0 =A0 us-east=A0=A0=A0=A0 1c=A0=A0=A0=A0=A0=A0=A0=A0=A0 Up=A0=A0= =A0=A0 Normal=A0 33.45 GB=A0=A0=A0=A0=A0=A0=A0 33.33%=A0 567137278201564105= 77229101238628035242
z.z.z.z =A0=A0 us-east=A0=A0=A0=A0 1c=A0=A0=A0=A0=A0=A0=A0=A0=A0 Up=A0=A0= =A0=A0 Normal=A0 29.85 GB=A0=A0=A0=A0=A0=A0=A0 33.33%=A0 113427455640312821= 154458202477256070485

repair runs weekly.
I don't run nodetool compact as I read that this may cause the minor re= gular compactions not to run and then I will have to run compact manually. = Is that right?

Any idea if this means something wrong, and if so, how to solve?<= /u>



Thanks,


Tamar Fraenkel=A0
Senior Software Engineer, TOK Media=A0

3D"Inline


tamar@tok-media.co= m
Tel:=A0=A0=A0+972 2 = 6409736=A0
Mob:=A0=A0+972 54 8= 356490=A0
Fax:=A0=A0=A0+972 2 = 5612956=A0

=A0

=A0

=A0

On Tue, Mar 27, 2012 at 9:12 AM, Tamar Fraenkel <= tamar@tok-media.co= m> wrote:

Thanks, I will wait and see as data accumulates.<= /u>

Thanks,


Tamar Fraenkel=A0<= /b>
Senior Software Engineer, TOK Media=A0

3D"Inline


tamar@tok-media.co= m
Tel:=A0=A0=A0+972 2 = 6409736=A0
Mob:=A0=A0+972 54 8= 356490=A0
Fax:=A0=A0=A0+972 2 5612956=A0

=A0

=A0

=A0

On Tue, Mar 27, 2012 at 9:00 AM, R. Verlangen <robin@us2.nl> wrote:=

Cassandra is built to store tons and tons of data. I= n my opinion roughly ~ 6MB per node is not enough data to allow it to becom= e a fully balanced cluster.

=A0

2012/3/27 Tamar Fraenkel <tamar@tok-media.com>=

This morning I have

=A0nodetool ring -h localhost

Address =A0 =A0 =A0 =A0 DC =A0 =A0 =A0 =A0 =A0Rack = =A0 =A0 =A0 =A0Status State =A0 Load =A0 =A0 =A0 =A0 =A0 =A0Owns =A0 =A0Tok= en

=A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 = =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0= =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0113427455640312821154458202477256070485<= /u>

10.34.158.33 =A0 =A0us-east =A0 =A0 1c =A0 =A0 =A0 = =A0 =A0Up =A0 =A0 Normal =A05.78 MB =A0 =A0 =A0 =A0 33.33% =A00

10.38.175.131 =A0 us-east =A0 =A0 1c =A0 =A0 =A0 =A0= =A0Up =A0 =A0 Normal =A07.23 MB =A0 =A0 =A0 =A0 33.33% =A05671372782015641= 0577229101238628035242

10.116.83.10 =A0 =A0us-east =A0 =A0 1c =A0 =A0 =A0 = =A0 =A0Up =A0 =A0 Normal =A05.02 MB =A0 =A0 =A0 =A0 33.33% =A01134274556403= 12821154458202477256070485

=A0

Version is 1.0.8.

=A0

=A0

Tamar Fraenkel=A0<= /b>
Senior Software Engineer, TOK Media=A0

3D"Inline


tamar@tok-media.co= m
Tel:=A0=A0=A0+972 2 6409736=A0
Mob:=A0=A0+972 54 8356490=A0
Fax:=A0=A0=A0+972 2 5612956=A0

=A0

=A0

=A0

On Tue, Mar 27, 2012 at 4:05 AM, Maki Watanabe <<= a href=3D"mailto:watanabe.maki@gmail.com" target=3D"_blank">watanabe.maki@g= mail.com> wrote:

What version are you using?

Anyway try nodetool repair & compact.<= /u>

=A0

maki<= /u>

=A0

2012/3/26 Tamar Fraenkel <tamar@tok-media.com>=

Hi!

I created Amazon ring using datastax image and start= ed filling the db.

The cluster seems un-balanced.

=A0

nodetool ring returns:

Address =A0 =A0 =A0 =A0 DC =A0 =A0 =A0 =A0 =A0Rack = =A0 =A0 =A0 =A0Status State =A0 Load =A0 =A0 =A0 =A0 =A0 =A0Owns =A0 =A0Tok= en

=A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 = =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0= =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0113427455640312821154458202477256070485<= /u>

10.34.158.33 =A0 =A0us-east =A0 =A0 1c =A0 =A0 =A0 = =A0 =A0Up =A0 =A0 Normal =A0514.29 KB =A0 =A0 =A0 33.33% =A00=

10.38.175.131 =A0 us-east =A0 =A0 1c =A0 =A0 =A0 =A0= =A0Up =A0 =A0 Normal =A01.5 MB =A0 =A0 =A0 =A0 =A033.33% =A056713727820156= 410577229101238628035242

10.116.83.10 =A0 =A0us-east =A0 =A0 1c =A0 =A0 =A0 = =A0 =A0Up =A0 =A0 Normal =A01.5 MB =A0 =A0 =A0 =A0 =A033.33% =A011342745564= 0312821154458202477256070485

=A0

[default@tok] describe;

Keyspace: tok:

=A0 Replication Strategy: org.apache.cassandra.locat= or.SimpleStrategy

=A0 Durable Writes: true

=A0 =A0 Options: [replication_factor:2]

=A0

[default@tok] describe cluster;

Cluster Information:

=A0 =A0Snitch: org.apache.cassandra.locator.Ec2Snitc= h

=A0 =A0Partitioner: org.apache.cassandra.dht.RandomP= artitioner

=A0 =A0Schema versions:

=A0 =A0 =A0 =A0 4687d620-7664-11e1-0000-1bcb936807ff= : [10.38.175.131, 10.34.158.33, 10.116.83.10]

=A0

=A0

Any idea what is the cause?

I am running similar code on local ring and it is ba= lanced.

=A0

How can I fix this?

=A0

Thanks,


Tamar Fraenkel=A0<= /b>
Senior Software Engineer, TOK Media=A0

3D"Inline


tamar@tok-media.co= m
Tel:=A0=A0=A0+972 2 6409736=A0
Mob:=A0=A0+972 54 8356490=A0
Fax:=A0=A0=A0+972 2 5612956=A0

=A0

=A0

=A0

=A0

=A0



=A0

--
With kind regards,

=A0

Robin Verlangen=

=A0

=A0

=A0

=A0

=A0

=A0

=A0

=A0

=A0


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