From owner-freebsd-fs@FreeBSD.ORG Thu Feb 21 01:42:08 2013 Return-Path: Delivered-To: freebsd-fs@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by hub.freebsd.org (Postfix) with ESMTP id 99DDE6A6 for ; Thu, 21 Feb 2013 01:42:08 +0000 (UTC) (envelope-from rmacklem@uoguelph.ca) Received: from esa-jnhn.mail.uoguelph.ca (esa-jnhn.mail.uoguelph.ca [131.104.91.44]) by mx1.freebsd.org (Postfix) with ESMTP id 62FE9A5F for ; Thu, 21 Feb 2013 01:42:07 +0000 (UTC) X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: AqIEADN7JVGDaFvO/2dsb2JhbAArGhaGM7oQgRtzgh8BAQEDAQEBASArIAsFFhgCAg0ZAikBCSYGCAcEARkDBIdrBgwtrUySN4EjjBQWgQ00B4ItgRMDiGaLDoI4gR2PPoMlT4EFNQ X-IronPort-AV: E=Sophos;i="4.84,705,1355115600"; d="scan'208";a="17555604" Received: from erie.cs.uoguelph.ca (HELO zcs3.mail.uoguelph.ca) ([131.104.91.206]) by esa-jnhn.mail.uoguelph.ca with ESMTP; 20 Feb 2013 20:42:01 -0500 Received: from zcs3.mail.uoguelph.ca (localhost.localdomain [127.0.0.1]) by zcs3.mail.uoguelph.ca (Postfix) with ESMTP id DB320B4032; Wed, 20 Feb 2013 20:42:01 -0500 (EST) Date: Wed, 20 Feb 2013 20:42:01 -0500 (EST) From: Rick Macklem To: grarpamp Message-ID: <127974626.3169918.1361410921874.JavaMail.root@erie.cs.uoguelph.ca> In-Reply-To: Subject: Re: Crazy ZFS ZIL options: md(4) umass(4) MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-Originating-IP: [172.17.91.202] X-Mailer: Zimbra 6.0.10_GA_2692 (ZimbraWebClient - FF3.0 (Win)/6.0.10_GA_2692) Cc: freebsd-fs@freebsd.org X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 21 Feb 2013 01:42:08 -0000 grarpamp wrote: > Still digesting this thread in free time. > There are some articles too... > > http://www.solarisinternals.com/wiki/index.php/ZFS_Best_Practices_Guide > http://www.solarisinternals.com/wiki/index.php/ZFS_Evil_Tuning_Guide > http://www.slideshare.net/relling/zfs-tutorial-lisa-2011 > http://constantin.glez.de/blog/2010/07/solaris-zfs-synchronous-writes-and-zil-explained > http://dtrace.org/blogs/brendan/2009/06/26/slog-screenshots/ > https://espix.net/~wildcat/txt/zfs-fragmentation.txt > http://pthree.org/2012/12/06/zfs-administration-part-iii-the-zfs-intent-log/ > http://www.techforce.com.br/news/layout/set/print/linux_blog/zfs_part_4_sustained_random_small_files_sync_write_iops > > Whatever happened to the old ISA ExpandedDRAM drives? > Today, bus based internal boards given mobo support of lots of ram > don't seem to make too much sense. But there has to be a cheap > SATA interface version of these things... a drive tray where you can > just stuff it with DIMMs and a battery. > Cheap as in, am I missing an entire class of $20-$50 devices > here? That's all they should cost in parts (minus ram), yet all I > see are $multikilo 'enterprise' stuff. If that's really the case one > could make them from China. > Someone posted mentioning this one. ($337 isn't $20-%50, but...): http://www.acard.com/english/fb01-product.jsp?idno_no=382&prod_no=ANS-9010BA&type1_idno=5&ino=28 > I can't see burning up an SSD (cost) for non-enterprise use. > I'll test with USB to expose failure modes. Will probably end up with > RAMZIL/syncdisable or adding a 10k spindle pair. > _______________________________________________ > freebsd-fs@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-fs > To unsubscribe, send any mail to "freebsd-fs-unsubscribe@freebsd.org"