Received: from malur.postgresql.org ([217.196.149.56]) by arkaria.postgresql.org with esmtp (Exim 4.84_2) (envelope-from ) id 1b5wgM-0003Au-QF for pgsql-performance@arkaria.postgresql.org; Thu, 26 May 2016 14:54:42 +0000 Received: from localhost ([127.0.0.1] helo=postgresql.org) by malur.postgresql.org with smtp (Exim 4.84_2) (envelope-from ) id 1b5wgM-0000KS-D1 for pgsql-performance@arkaria.postgresql.org; Thu, 26 May 2016 14:54:42 +0000 Received: from magus.postgresql.org ([2a02:c0:301:0:ffff::29]) by malur.postgresql.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA384:256) (Exim 4.84_2) (envelope-from ) id 1b5weg-0005yJ-71 for pgsql-performance@postgresql.org; Thu, 26 May 2016 14:52:58 +0000 Received: from mail-lf0-x235.google.com ([2a00:1450:4010:c07::235]) by magus.postgresql.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.84_2) (envelope-from ) id 1b5weY-0002qU-2U for pgsql-performance@postgresql.org; Thu, 26 May 2016 14:52:57 +0000 Received: by mail-lf0-x235.google.com with SMTP id k98so33705073lfi.1 for ; Thu, 26 May 2016 07:52:49 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=leboutique.com; s=google; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc; bh=EYJtjAJkw659jqSiMohxzVJoNaMXrjUU1g9MHUqQars=; b=U2oWhuvtICBPWjCNbgTLxUamtyuwV0qmTphV/9yB9/PVJd+lxufjoA7S3Tnr4k5ctv YAWIQd3AOkvCb6k0Mo5JFBqx/kGOfonCmQfMzOIruy9iKxchcsmr6YtIG85BH3XPiMD6 kuOCEHWp2vReR1Z3+HyEa4i1myLUbWjj+KZhI= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc; bh=EYJtjAJkw659jqSiMohxzVJoNaMXrjUU1g9MHUqQars=; b=h2ovP18sLQ0pgN6nTayg86pmiOelhkByEqg5EgMIiZaiOvbUiXSF25cjKNEUYeiBG7 M75SkbcIdwbQ+JRQtcfz8E51q5jvba1bmhw5hv1k1iq+ScM6eiGyeHkqxPhU23lNigo/ LvdmfLYeQbKa9BTTITD35PyuBeOLAysRuc8tilVILx36OQWg25Kf7VLlgDCiRd+LgRwf o2gel+1Tcla1sJxhtmXeuXZZfj1vIJh02hqa+XWQS2JtQbplQXpUtO2CwMMAVpyL6G06 9uQ3MrnDqkAMj6nMBY6C1KklhfastHfY1fe/iNiWo6Cx0UhfSSDz6rnkgkhw/55BNttz ocrg== X-Gm-Message-State: ALyK8tKjd35D6tLRNCZSH1N4tWJTmDWf+oIQgZK4zeLVwvUcF36QN0tp9MgCB+UDP0OC8uelDARiB5rV88D5i9YW X-Received: by 10.25.21.40 with SMTP id l40mr2549727lfi.225.1464274369116; Thu, 26 May 2016 07:52:49 -0700 (PDT) MIME-Version: 1.0 Received: by 10.25.18.229 with HTTP; Thu, 26 May 2016 07:52:29 -0700 (PDT) In-Reply-To: References: <57463BAC.2090608@zioup.com> <5746F1B3.8080701@zioup.com> From: Artem Tomyuk Date: Thu, 26 May 2016 17:52:29 +0300 Message-ID: Subject: Re: Testing in AWS, EBS To: Rayson Ho Cc: Yves Dorfsman , pgsql-performance@postgresql.org Content-Type: multipart/alternative; boundary=001a11407ceca016800533bff1a5 X-Pg-Spam-Score: -2.7 (--) List-Archive: List-Help: List-ID: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: X-Mailing-List: pgsql-performance Precedence: bulk Sender: pgsql-performance-owner@postgresql.org --001a11407ceca016800533bff1a5 Content-Type: text/plain; charset=UTF-8 Please look at the official doc. "New EBS volumes receive their maximum performance the moment that they are available and do not require initialization (formerly known as pre-warming). However, storage blocks on volumes that were restored from snapshots must be initialized (pulled down from Amazon S3 and written to the volume) before you can access the block" Quotation from: http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ebs-initialize.html 2016-05-26 17:47 GMT+03:00 Rayson Ho : > On Thu, May 26, 2016 at 10:00 AM, Artem Tomyuk > wrote: > >> >> 2016-05-26 16:50 GMT+03:00 Rayson Ho : >> >>> Amazon engineers said that EBS pre-warming is not needed anymore. >> >> >> but still if you will skip this step you wont get much performance on ebs >> created from snapshot. >> > > > IIRC, that's not what Amazon engineers said. Is that from your personal > experience, and if so, when did you do the test?? > > Rayson > > ================================================== > Open Grid Scheduler - The Official Open Source Grid Engine > http://gridscheduler.sourceforge.net/ > http://gridscheduler.sourceforge.net/GridEngine/GridEngineCloud.html > > > > --001a11407ceca016800533bff1a5 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
Please look at the official doc.

= "New EBS volumes receive their maximum performance the moment that the= y are available and do not require initialization (formerly known as pre-wa= rming). However, storage blocks on volumes that were restored from snapshot= s must be initialized (pulled down from Amazon S3 and written to the volume= ) before you can access the block"


2016-05-26 17:47 GMT+03:00 Rayson Ho <raysonlogin@gmail.co= m>:
On Thu, May 26, 2016 at 10= :00 AM, Artem Tomyuk <admin@leboutique.com> wrote:

2016-05-26 16:50 GMT+03:00 Rayson Ho <raysonlogin@gmail.c= om>:
Amazon engineers said that EBS pre-= warming is not needed anymore.

but still if yo= u will skip this step you wont get much performance on ebs created from sna= pshot.


IIRC, that's not what Amazon engineers said. Is that from your perso= nal experience, and if so, when did you do the test??

Rayson

=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
Open Grid Scheduler - The Official Open S= ource Grid Engine
http://gridscheduler.sourceforge.net/

=C2=A0


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