From owner-freebsd-current@FreeBSD.ORG Mon Dec 17 14:08:30 2007 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id F100E16A417 for ; Mon, 17 Dec 2007 14:08:30 +0000 (UTC) (envelope-from ivoras@gmail.com) Received: from rv-out-0910.google.com (rv-out-0910.google.com [209.85.198.184]) by mx1.freebsd.org (Postfix) with ESMTP id D3E1213C45B for ; Mon, 17 Dec 2007 14:08:30 +0000 (UTC) (envelope-from ivoras@gmail.com) Received: by rv-out-0910.google.com with SMTP id l15so2106574rvb.43 for ; Mon, 17 Dec 2007 06:08:29 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:message-id:date:from:sender:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references:x-google-sender-auth; bh=gzxE2HqHZSV5jaXG07TpGQ15P54kBUrCXXueiHA5BzM=; b=pn+6/NfrKJ3IC86hZ3kP8UBMGL7SHLWCXMbNSqV98EL+1Tuol9WZ1xDpJMh1PNQx9U26d/tKz30m3TJe/NCU15Y+vCHpXzA1grFOwf5swHyx+PatjlHa+BOcRLf+geEveOH0I8cW8UZfLYc3MDLfWM0RMmZAsZQbmzChNkKlUsI= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:sender:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references:x-google-sender-auth; b=B+IasccWXRR0vWUeg929ckm8DvFxy1LkZQRuVnTD4/Sqmz+plgZvCOIzX/rfPctrVbXmuwVSzlqc7Q8AKYNbnqy8okW47ArcEQz1T6WyGEGbDEbRWFlYyQOz1XxsOprBZeRjEReRK2H5pfn7k8rEtQYK28ECf9iXEFEBU0RRgpo= Received: by 10.141.153.16 with SMTP id f16mr4002772rvo.22.1197900509935; Mon, 17 Dec 2007 06:08:29 -0800 (PST) Received: by 10.141.212.1 with HTTP; Mon, 17 Dec 2007 06:08:29 -0800 (PST) Message-ID: <9bbcef730712170608k28d636a8y45de089bfa99fc2e@mail.gmail.com> Date: Mon, 17 Dec 2007 15:08:29 +0100 From: "Ivan Voras" Sender: ivoras@gmail.com To: "Rainer Duffner" In-Reply-To: <476675D6.7060905@ultra-secure.de> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <47606C09.2070209@isc.org> <476343B4.8080208@FreeBSD.org> <86tzmk54tt.fsf@ds4.des.no> <86r6hmsnew.fsf@ds4.des.no> <9bbcef730712160657r79507740m2b6d7d4b787c99a5@mail.gmail.com> <86zlwafvld.fsf@ds4.des.no> <476675D6.7060905@ultra-secure.de> X-Google-Sender-Auth: 944b410aed2f9592 Cc: freebsd-current@freebsd.org Subject: Re: ZFS melting under postgres... X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 17 Dec 2007 14:08:31 -0000 On 17/12/2007, Rainer Duffner wrote: > Ivan Voras wrote: > > I'm interested in how SSD could help me (if they actually can) with > > large-ish systems running web servers with associated software (e.g. > > database) and office-like servers. So far, I'm having trouble > > envisioning a seek-intensive storage application that's also temporary > > (to avoid keeping the "real" data on flash drives). Maybe a mail server > > queue, with mailboxes on standard drives? > > > > Yep. > Although, I don't know if the "cheap" SSDs mentioned can compete with > the SD-RAM backed "super SSDs". > Because, in the mail-server scenario (also: clamav-box, spamassassin > etc.), all you really want to have is I/O. > > I don't know if the flash-based "SSDs" can really compete in that area. They probably can't - their technology is much slower. This is why I was concentrating on fiding a seek-intensive load which doesn't depend much on raw bandwidth :)