From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on sa.local.altlinux.org X-Spam-Level: ** X-Spam-Status: No, score=2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DNS_FROM_AHBL_RHSBL, RCVD_IN_BRBL_LASTEXT, SPF_PASS autolearn=no autolearn_force=no version=3.4.0 DKIM-Filter: OpenDKIM Filter v2.9.2 python.ilimnet.ru AFFE6E1B41 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=taf.ru; s=FCA68DE2-074C-11E2-AD6F-DEDBFE231BC9; t=1421637520; bh=eaaW/hK23z/DX/1naRCJhKc6MeXxTaeT3/jXif+GSsA=; h=Date:From:To:Message-ID:Subject:MIME-Version:Content-Type: Content-Transfer-Encoding; b=pV0cBeBKWlXh36lVWxHxfqceujB35u6+Mjm/ieE5B4B7tqDoROvk6NSYK6sLcqZ+i /3IH0kQ0YWbBUIorqIiElnmaDAlAbjkZg5aWj0197y/d1hE9ZWhuI918v3WxCXiI4t 0SmEvr3yKWu79HQ8lyQx2eWaeCnrZYpT3D4fmxNc= X-Virus-Scanned: amavisd-new at ilimnet.ru Date: Mon, 19 Jan 2015 12:18:40 +0900 (IRKT) From: alexei@taf.ru To: ALT Linux sysadmins' discussion Message-ID: <1901896362.489747.1421637520390.JavaMail.zimbra@taf.ru> In-Reply-To: References: <54BAA626.1080408@complife.ru> <54BBF5E1.8090709@complife.ru> <278574270.488920.1421635854790.JavaMail.zimbra@taf.ru> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 X-Originating-IP: [193.33.232.46] X-Mailer: Zimbra 8.6.0_GA_1154 (ZimbraWebClient - FF34 (Linux)/8.6.0_GA_1154) Thread-Topic: bcache Thread-Index: qp/idzD5J1rv6IOCxMkRvBfRDNQ8hw== Content-Transfer-Encoding: quoted-printable Subject: Re: [Sysadmins] bcache X-BeenThere: sysadmins@lists.altlinux.org X-Mailman-Version: 2.1.12 Precedence: list Reply-To: ALT Linux sysadmins' discussion List-Id: ALT Linux sysadmins' discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 19 Jan 2015 03:17:21 -0000 Archived-At: List-Archive: ----- =D0=98=D1=81=D1=85=D0=BE=D0=B4=D0=BD=D0=BE=D0=B5 =D1=81=D0=BE=D0=BE= =D0=B1=D1=89=D0=B5=D0=BD=D0=B8=D0=B5 ----- > =D0=9E=D1=82: "=D0=95=D0=B2=D0=B3=D0=B5=D0=BD=D0=B8=D0=B9 =D0=A2=D0=B5=D1= =80=D0=B5=D1=88=D0=BA=D0=BE=D0=B2" > =D0=9A=D0=BE=D0=BC=D1=83: "ALT Linux sysadmins' discussion" > =D0=9E=D1=82=D0=BF=D1=80=D0=B0=D0=B2=D0=BB=D0=B5=D0=BD=D0=BD=D1=8B=D0=B5= : =D0=9F=D0=BE=D0=BD=D0=B5=D0=B4=D0=B5=D0=BB=D1=8C=D0=BD=D0=B8=D0=BA, 19 = =D0=AF=D0=BD=D0=B2=D0=B0=D1=80=D1=8C 2015 =D0=B3 11:11:27 > =D0=A2=D0=B5=D0=BC=D0=B0: Re: [Sysadmins] bcache > taf =D0=BF=D0=B8=D1=88=D0=B5=D1=82: >=20 >>>> writethrough =D0=B8=D0=BB=D0=B8 writeback? >>> writethrough, =D0=BF=D0=BE =D1=83=D0=BC=D0=BE=D0=BB=D1=87=D0=B0=D0=BD= =D0=B8=D1=8E. >> =D0=90 =D0=BA=D0=B0=D0=BA=D0=BE=D0=B2 =D0=B1=D1=8B=D0=BB =D0=BF=D1=80=D0= =BE=D1=84=D0=B8=D0=BB=D1=8C =D0=BE=D0=B1=D0=BC=D0=B5=D0=BD=D0=B0 =D0=B4=D0= =B0=D0=BD=D0=BD=D1=8B=D0=BC=D0=B8 =D1=81 =D0=B4=D0=B8=D1=81=D0=BA=D0=BE=D0= =BC? =D0=9F=D1=80=D0=BE=D1=81=D1=82=D0=BE =D0=BF=D1=80=D0=B8 =D1=82=D0=B0= =D0=BA=D0=BE=D0=BC =D0=B2=D0=B8=D0=B4=D0=B5 =D0=BA=D0=B5=D1=88=D0=B8=D1=80= =D0=BE=D0=B2=D0=B0=D0=BD=D0=B8=D1=8F >> =D0=BF=D1=80=D0=BE=D0=B8=D0=B7=D0=B2=D0=BE=D0=B4=D0=B8=D1=82=D0=B5=D0=BB= =D1=8C=D0=BD=D0=BE=D1=81=D1=82=D1=8C =D0=BF=D0=BE=D0=B2=D1=8B=D1=88=D0=B0= =D0=B5=D1=82=D1=81=D1=8F =D0=B4=D0=BB=D1=8F =D0=BE=D1=87=D0=B5=D0=BD=D1=8C= =D1=83=D0=B7=D0=BA=D0=BE=D0=B3=D0=BE =D0=BA=D1=80=D1=83=D0=B3=D0=B0 =D0=B7= =D0=B0=D0=B4=D0=B0=D1=87 - =D0=BF=D0=B8=D1=88=D0=B5=D0=BC =D0=BD=D0=B0 =D0= =B4=D0=B8=D1=81=D0=BA >> =D0=BD=D0=B5=D0=BC=D0=BD=D0=BE=D0=B3=D0=BE >> =D0=B4=D0=B0=D0=BD=D0=BD=D1=8B=D1=85 =D0=B8 =D0=BF=D0=BE=D1=82=D0=BE=D0= =BC =D0=BE=D1=87=D0=B5=D0=BD=D1=8C =D0=B0=D0=BA=D1=82=D0=B8=D0=B2=D0=BD=D0= =BE =D0=B8 =D0=BC=D0=BD=D0=BE=D0=B3=D0=BE=D0=BA=D1=80=D0=B0=D1=82=D0=BD=D0= =BE =D0=B8=D1=85 =D1=87=D0=B8=D1=82=D0=B0=D0=B5=D0=BC. =D0=9D=D0=B0 =D1=82= =D0=B8=D0=BF=D0=BE=D0=B2=D1=8B=D1=85 =D1=81=D0=B8=D1=81=D1=82=D0=B5=D0=BC= =D0=B0=D1=85 >> =D0=B6=D0=B4=D0=B0=D1=82=D1=8C =D0=BF=D1=80=D0=B8=D1=80=D0=BE=D1=81=D1= =82 =D0=BD=D0=B5 =D0=BF=D1=80=D0=B8=D1=85=D0=BE=D0=B4=D0=B8=D1=82=D1=81=D1= =8F. =D0=A3=D1=87=D0=B8=D1=82=D1=8B=D0=B2=D0=B0=D1=8F =D1=82=D0=BE, =D1=87= =D1=82=D0=BE =D0=BA=D0=B5=D1=88=D0=B8=D1=80=D0=BE=D0=B2=D0=B0=D0=BD=D0=B8= =D0=B5 =D0=BF=D1=80=D0=BE=D0=B8=D0=B7=D0=B2=D0=BE=D0=B4=D0=B8=D1=82=D1=81= =D1=8F =D0=B2=D1=81=D0=B5 =D0=B6=D0=B5 =D0=BD=D0=B5 >> =D0=B2 =D0=9E=D0=97=D0=A3 >> =D0=B0 =D0=BD=D0=B0 =D0=BD=D0=B0=D0=BA=D0=BE=D0=BF=D0=B8=D1=82=D0=B5=D0= =BB=D1=8C, =D1=82=D0=BE =D0=B1=D0=BE=D0=BB=D0=B5=D0=B5 =D0=BF=D0=BE=D0=B4= =D1=85=D0=BE=D0=B4=D1=8F=D1=89=D0=B0=D1=8F =D0=BF=D0=BE=D0=BB=D0=B8=D1=82= =D0=B8=D0=BA=D0=B0 writeback, IMHO. >=20 > ~ 30/70% read/write =D1=81 =D0=B5=D0=B4=D0=B8=D0=BD=D0=B8=D1=86=D0=B0=D0= =BC=D0=B8 =D1=88=D1=82=D1=83=D0=BA IOPS =D0=BD=D0=B0 =D0=B1=D1=8B=D1=82=D0= =BE=D0=B2=D1=8B=D1=85 SATA2 7.2krpm (=D0=BD=D0=BE =D1=8D=D1=82=D0=BE > =D1=81=D0=B5=D0=B9=D1=87=D0=B0=D1=81, =D1=83=D0=B6=D0=B5 =D0=BF=D0=BE=D1= =81=D0=BB=D0=B5 =D1=83=D0=BC=D0=B8=D1=80=D0=B0=D0=BD=D0=B8=D1=8F SSD, =D0= =B7=D0=B0=D0=BC=D0=B5=D0=BD=D1=8B HDD =D0=B2 md-raid1 =D0=B8 =D0=B4=D0=BE= =D0=B1=D0=B0=D0=B2=D0=BB=D0=B5=D0=BD=D0=B8=D1=8F RAM, =D0=B0 > =D1=82=D0=BE=D0=B3=D0=B4=D0=B0 =D0=BD=D0=B5 =D0=BC=D0=BE=D0=BD=D0=B8=D1= =82=D0=BE=D1=80=D0=B8=D0=BB). =D0=9F=D0=BB=D1=8E=D1=81 =D0=BE=D1=87=D0=B5= =D0=BD=D1=8C =D0=BD=D0=B5=D0=B1=D0=BE=D0=BB=D1=8C=D1=88=D0=BE=D0=B9 =D0=B8= =D0=BD=D0=B5=D0=B1=D1=8B=D1=81=D1=82=D1=80=D1=8B=D0=B9 SSD. =D0=92=D0=BE= =D0=BE=D0=B1=D1=89=D0=B5, =D0=B7=D0=B0=D0=B4=D0=B0=D1=87=D0=B0 > =D1=81=D1=82=D0=BE=D1=8F=D0=BB=D0=B0 =D0=BA=D0=B0=D0=BA "=D0=BF=D1=80=D0= =BE=D0=B2=D0=B5=D1=80=D0=B8=D1=82=D1=8C =D1=80=D0=B0=D0=B1=D0=BE=D1=82=D0= =BE=D1=81=D0=BF=D0=BE=D1=81=D0=BE=D0=B1=D0=BD=D0=BE=D1=81=D1=82=D1=8C bca= che-tools =D0=BD=D0=B0 =D0=BF=D0=BE=D0=B4=D0=BD=D0=BE=D0=B6=D0=BD=D0=BE=D0= =BC > =D0=BC=D0=B0=D1=82=D0=B5=D1=80=D0=B8=D0=B0=D0=BB=D0=B5", =D0=BF=D1=80=D0= =BE=D0=B8=D0=B7=D0=B2=D0=BE=D0=B4=D0=B8=D1=82=D0=B5=D0=BB=D1=8C=D0=BD=D0=BE= =D1=81=D1=82=D0=B8 =D0=BD=D0=B8=D0=BA=D1=82=D0=BE =D0=BD=D0=B5 =D0=BF=D1=8B= =D1=82=D0=B0=D0=BB=D1=81=D1=8F =D0=B4=D0=BE=D0=B1=D0=B8=D1=82=D1=8C=D1=81= =D1=8F. =D0=AD=D1=82=D0=BE =D1=81=D0=BA=D1=80=D0=BE=D0=BC=D0=BD=D1=8B=D0=B9 > =D0=B4=D0=B5=D1=81=D0=BA=D1=82=D0=BE=D0=BF :-) =D0=9F=D1=80=D0=B8 =D1=82=D0=B0=D0=BA=D0=BE=D0=BC =D0=BF=D1=80=D0=BE=D1=84= =D0=B8=D0=BB=D0=B5 =D0=B8 =D1=82=D0=B0=D0=BA=D0=BE=D0=B9 =D0=BF=D0=BE=D0=BB= =D0=B8=D1=82=D0=B8=D0=BA=D0=B5 =D0=BA=D0=B0=D0=BA=D0=BE=D0=B3=D0=BE-=D1=82= =D0=BE =D1=8D=D1=84=D1=84=D0=B5=D0=BA=D1=82=D0=B0 =D0=B6=D0=B4=D0=B0=D1=82= =D1=8C =D0=BD=D0=B5 =D0=BF=D1=80=D0=B8=D1=85=D0=BE=D0=B4=D0=B8=D1=82=D1=81= =D1=8F. =D0=97=D0=B0=D0=BF=D0=B8=D1=81=D1=8C =D0=BF=D1=80=D0=BE=D0=B8=D0=B7=D0=B2=D0=BE=D0=B4=D0=B8=D1=82=D1=81=D1=8F = =D0=BE=D0=B4=D0=BD=D0=BE=D0=B2=D1=80=D0=B5=D0=BC=D0=B5=D0=BD=D0=BD=D0=BE = =D0=B8 =D0=BD=D0=B0 =D0=B4=D0=B8=D1=81=D0=BA =D0=B8 =D0=BD=D0=B0 ssd, =D0= =B4=D0=B0=D0=BD=D0=BD=D1=8B=D0=B5 =D1=81=D1=82=D0=B0=D0=BD=D0=BE=D0=B2=D1= =8F=D1=82=D1=81=D1=8F =D0=B4=D0=BE=D1=81=D1=82=D1=83=D0=BF=D0=BD=D1=8B=D0= =BC=D0=B8 =D0=BD=D0=B0 =D1=87=D1=82=D0=B5=D0=BD=D0=B8=D0=B5 =D0=BF=D0=BE =D0=B7=D0=B0=D0=B2=D0=B5= =D1=80=D1=88=D0=B5=D0=BD=D0=B8=D1=8E =D0=BE=D0=BF=D0=B5=D1=80=D0=B0=D1=86= =D0=B8=D0=B8 =D0=B7=D0=B0=D0=BF=D0=B8=D1=81=D0=B8 =D0=B8 =D1=82=D0=B0=D0=BC= , =D0=B8 =D1=82=D0=B0=D0=BC. =D0=9D=D0=B0=D1=81=D0=BA=D0=BE=D0=BB=D1=8C=D0= =BA=D0=BE =D1=8F =D0=BF=D0=BE=D0=BD=D1=8F=D0=BB, =D0=BA=D0=B5=D1=88=D0=B8= =D1=80=D0=BE=D0=B2=D0=B0=D0=BD=D0=B8=D0=B5 =D0=B4=D0=B0=D0=BD=D0=BD=D1=8B=D1=85 =D0=BD=D0=B0 =D1=87=D1=82=D0=B5=D0=BD= =D0=B8=D0=B5 =D0=BA=D0=B0=D0=BA =D0=B1=D1=8B=D0=BB=D0=BE =D0=B7=D0=B0 =D0= =9E=D0=97=D0=A3, =D1=82=D0=B0=D0=BA =D0=B8 =D0=BE=D1=81=D1=82=D0=B0=D0=BB= =D0=BE=D1=81=D1=8C.