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 3D6A910562 for ; Mon, 7 Apr 2014 11:11:19 +0000 (UTC) Received: (qmail 82170 invoked by uid 500); 7 Apr 2014 11:11:16 -0000 Delivered-To: apmail-cassandra-user-archive@cassandra.apache.org Received: (qmail 81644 invoked by uid 500); 7 Apr 2014 11:11:15 -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 80845 invoked by uid 99); 7 Apr 2014 11:11:13 -0000 Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 07 Apr 2014 11:11:13 +0000 X-ASF-Spam-Status: No, hits=2.5 required=5.0 tests=HTML_FONT_FACE_BAD,HTML_MESSAGE,SPF_PASS,T_FILL_THIS_FORM_SHORT X-Spam-Check-By: apache.org Received-SPF: pass (athena.apache.org: local policy) Received: from [88.198.227.105] (HELO team.enercast.de) (88.198.227.105) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 07 Apr 2014 11:11:09 +0000 Received: from [172.17.2.199] (alpha.enercast.de [217.86.247.221]) (using TLSv1 with cipher DHE-RSA-AES128-SHA (128/128 bits)) (No client certificate requested) by team.enercast.de (Postfix) with ESMTPSA id 90FCC2F2049D for ; Mon, 7 Apr 2014 11:10:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=enercast.de; s=mail; t=1396869046; bh=4h1g54juVnzF0aB931PkF0hMo0l86UabueUCwKQilLg=; h=Date:From:To:Subject:References:In-Reply-To:From; b=aEZawu8E8fFH0+eQwVBphCYwgrs70ZDWdaCaOtTqNfjkss/ZeuQoZDqyPE7wM/ob+ Dbz0KtFXmizX2Gl/P1k2COqAN+sP4mu8DoaY5EThS7D76oID2XvFXg6ul42wLwVMg9 WB6PiLu6jqPs7t3NBFWQDYYzJfhTxcmHBqNL4FjU= Message-ID: <534287B1.50008@enercast.de> Date: Mon, 07 Apr 2014 13:10:41 +0200 From: Jan Kesten User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:24.0) Gecko/20100101 Thunderbird/24.4.0 MIME-Version: 1.0 To: user@cassandra.apache.org Subject: Re: Cassandra Disk storage capacity References: In-Reply-To: Content-Type: multipart/alternative; boundary="------------030708010906020602000000" X-Virus-Checked: Checked by ClamAV on apache.org This is a multi-part message in MIME format. --------------030708010906020602000000 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 8bit Hi Hari, C* will use your entire space - that is something one should monitor. Depending on your choose on compaction strategy your data_dir should not be filled up entirely - in the worst case compaction will need space as large as the sstables on disk, therefore 50% should be free space. The parameters used for on disk storage are commitlog_directory and data_file_directories and saved_caches_directory. The paramter data_file_directories is in plural, you can easily put more than one directory here (and you should do this instead of using RAID). Cheers, Jan Am 07.04.2014 12:56, schrieb Hari Rajendhran: > Hi Team, > > We have a 3 node Apache cassandra 2.0.4 setup installed in our lab > setup.We have set data directory to /var/lib/cassandra/data.What would > be the maximum > disk storage that will be used for cassandra data storage. > > Note : /var partition has a storage capacity of 40GB. > > My question is whether cassandra will the entire / directory for data > storage ? > If no, how to specify multiple directories for data storage ?? > > > > > > Best Regards > Hari Krishnan Rajendhran > Hadoop Admin > DESS-ABIM ,Chennai BIGDATA Galaxy > Tata Consultancy Services > Cell:- 9677985515 > Mailto: hari.rajendhran@tcs.com > Website: http://www.tcs.com > ____________________________________________ > Experience certainty. IT Services > Business Solutions > Consulting > ____________________________________________ > > =====-----=====-----===== > Notice: The information contained in this e-mail > message and/or attachments to it may contain > confidential or privileged information. If you are > not the intended recipient, any dissemination, use, > review, distribution, printing or copying of the > information contained in this e-mail message > and/or attachments to it are strictly prohibited. If > you have received this communication in error, > please notify us by reply e-mail or telephone and > immediately and permanently delete the message > and any attachments. Thank you > -- Jan Kesten, mailto:j.kesten@enercast.de Tel.: +49 561/4739664-0 FAX: -9 enercast GmbH Friedrich-Ebert-Str. 104 D-34119 Kassel HRB15471 http://www.enercast.de Online-Prognosen f�r erneuerbare Energien Gesch�ftsf�hrung: Dipl. Ing. Thomas Landgraf, Bernd Kratz Diese E-Mail und etwaige Anh�nge k�nnen vertrauliche und/oder rechtlich gesch�tzte Informationen enthalten. Falls Sie nicht der angegebene Empf�nger sind oder falls diese E-Mail irrt�mlich an Sie adressiert wurde, benachrichtigen Sie uns bitte sofort durch Antwort-E-Mail und l�schen Sie diese E-Mail nebst etwaigen Anlagen von Ihrem System. Ebenso d�rfen Sie diese E-Mail oder ihre Anlagen nicht kopieren oder an Dritte weitergeben. Vielen Dank. This e-mail and any attachment may contain confidential and/or privileged information. If you are not the named addressee or if this transmission has been addressed to you in error, please notify us immediately by reply e-mail and then delete this e-mail and any attachment from your system. Please understand that you must not copy this e-mail or any attachment or disclose the contents to any other person. Thank you for your cooperation. --------------030708010906020602000000 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit
Hi Hari,

C* will use your entire space - that is something one should monitor. Depending on your choose on compaction strategy your data_dir should not be filled up entirely - in the worst case compaction will need space as large as the sstables on disk, therefore 50% should be free space.

The parameters used for on disk storage are commitlog_directory and data_file_directories and saved_caches_directory. The paramter data_file_directories is in plural, you can easily put more than one directory here (and you should do this instead of using RAID).

Cheers,
Jan

Am 07.04.2014 12:56, schrieb Hari Rajendhran:
Hi Team,

We have a 3 node Apache cassandra 2.0.4 setup installed in our lab setup.We have set data directory to /var/lib/cassandra/data.What would be the maximum 
disk storage that will be used for cassandra data storage.

Note : /var partition has a storage capacity of 40GB.

My question is whether cassandra will  the entire / directory for data storage ?
If no, how to specify multiple directories for data storage ??

 


 
Best Regards
Hari Krishnan Rajendhran
Hadoop Admin
DESS-ABIM ,Chennai BIGDATA Galaxy
Tata Consultancy Services
Cell:- 9677985515
Mailto: hari.rajendhran@tcs.com
Website: http://www.tcs.com
____________________________________________
Experience certainty. IT Services
Business Solutions
Consulting
____________________________________________

=====-----=====-----=====
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message and/or attachments to it may contain
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information contained in this e-mail message
and/or attachments to it are strictly prohibited. If
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-- 
Jan Kesten, mailto:j.kesten@enercast.de
Tel.: +49 561/4739664-0 FAX: -9
enercast GmbH Friedrich-Ebert-Str. 104 D-34119 Kassel       HRB15471
http://www.enercast.de Online-Prognosen für erneuerbare Energien
Geschäftsführung: Dipl. Ing. Thomas Landgraf, Bernd Kratz

Diese E-Mail und etwaige Anhänge können vertrauliche und/oder rechtlich geschützte Informationen enthalten. Falls Sie nicht der angegebene Empfänger sind oder falls diese E-Mail irrtümlich an Sie adressiert wurde, benachrichtigen Sie uns bitte sofort durch Antwort-E-Mail und löschen Sie diese E-Mail nebst etwaigen Anlagen von Ihrem System. Ebenso dürfen Sie diese E-Mail oder ihre Anlagen nicht kopieren oder an Dritte weitergeben. Vielen Dank.

This e-mail and any attachment may contain confidential and/or privileged information. If you are not the named addressee or if this transmission has been addressed to you in error, please notify us immediately by reply e-mail and then delete this e-mail and any attachment from your system. Please understand that you must not copy this e-mail or any attachment or disclose the contents to any other person. Thank you for your cooperation.
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