Sent from my iPhone (which had a lousy user interface which makes it all too easy for a clumsy oaf like me to touch "Send" before I'm done)...
On 23 Dec 2010, at 11:07, Phil Harman <phil.har...@gmail.com> wrote: > Great question. In "good enough" computing, beauty is in the eye of the > beholder. My home NAS appliance uses mirrorwd IDE and SATA drives without a > dedicated ZIL device. And for my home SMB and NFS, that's good enough. I'm sure that even a 7200rpm SATA ZIL would improve things inmy case. The random I/O requirement for the ZIL is discussed by Adam (and Chris) here ... > http://dtrace.org/blogs/ahl/2010/11/15/zil-analysis-from-chris-george/ What I find most encouraging is this statement: > "if HDDs and commodity SSDs continue to be target ZIL devices, ZFS could and > should do more to ensure that writes are sequential." It's not broken, but it is suboptimal, and fixable (apparently) ;) > On 23 Dec 2010, at 10:25, Stephan Budach <stephan.bud...@jvm.de> wrote: > >> Hi, >> >> as I have learned from the discussion about which SSD to use as ZIL drives, >> I stumbled across this article, that discusses short stroking for increasing >> IOPs on SAS and SATA drives: >> >> http://www.tomshardware.com/reviews/short-stroking-hdd,2157.html >> >> Now, I am wondering if using a mirror of such 15k SAS drives would be a >> good-enough fit for a ZIL on a zpool that is mainly used for file services >> via AFP and SMB. >> I'd particulary like to know, if someone has already used such a solution >> and how it has worked out. >> >> Cheers, >> budy >> >> >> -- >> Stephan Budach >> Jung von Matt/it-services GmbH >> Glashüttenstraße 79 >> 20357 Hamburg >> >> Tel: +49 40-4321-1353 >> Fax: +49 40-4321-1114 >> E-Mail: stephan.bud...@jvm.de >> Internet: http://www.jvm.com >> >> Geschäftsführer: Ulrich Pallas, Frank Wilhelm >> AG HH HRB 98380 >> _______________________________________________ >> zfs-discuss mailing list >> zfs-discuss@opensolaris.org >> http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
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