Article View: comp.sys.ibm.pc.hardware.storage
Article #845Re: Question on EMC Symmetrix Software
From: Foozer
Date: Mon, 21 Jan 2002 04:48
Date: Mon, 21 Jan 2002 04:48
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> Whoops, common misconception. Metavolumes are not striped. Metavolumes are > simply a set of basic hipervolumes that have been concatenated and presented > to the pirt as on logical device. If you are using 4GB Hipervolumes, and you > use these to create a 32GB Metavolume then you should understand that only > capacity is increased, not performance. A 2GB file allocated within the > first 4GB of the metavolume will not be striped across more disks. It will > simply be on the first hipervolume, one spindle for RAID-S and mirrored on 2 > spindle for RAID-1. If file has uniformly random access and it traverses 2 > hipervolumes, only then will you have some performance improvement. Ron, You're wrong. The Symm has been able to stripe Raid 1 drives for about 1.5 years and can also now stripe RAID-S volumes. I can see it coming, so I will save you the trouble ... before any swipes are taken on Raid-S vs. Raid-5 .... the RAID-S stripped metas way out perform conventional both RAID-S and RAID-5.
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X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: fd4af,9a848a1ff6daa26d X-Google-Attributes: gidfd4af,public X-Google-Thread: 10e1c8,9a848a1ff6daa26d X-Google-Attributes: gid10e1c8,public X-Google-Thread: f4d7c,9a848a1ff6daa26d X-Google-Attributes: gidf4d7c,public X-Google-ArrivalTime: 2002-01-20 20:44:28 PST Path: arc1-ca.pugleaf.net!archiver1.google.com!news1.google.com!newsfeed.stanford.edu!news-spur1.maxwell.syr.edu!news.maxwell.syr.edu!cpk-news-hub1.bbnplanet.com!news.gtei.net!newsfeed1.cidera.com!Cidera!cyclone.columbus.rr.com!typhoon.neo.rr.com.POSTED!not-for-mail From: "Foozer" <Foozer@home.net> Newsgroups: comp.sys.ibm.pc.hardware.storage,comp.arch.storage,bit.listserv.ibm-main References: <ta7D7.203855$%B.15365892@bin1.nnrp.aus1.giganews.com> <9rkbg3$hdp1@emcnews1.lss.emc.com> <0AmD7.359$S4.26420@newsread1.prod.itd.earthlink.net> <9rm367$jkr$2@isdserv3.macquarie.com.au> <qWID7.13577$U7.996810@bin1.nnrp.aus1.giganews.com> <9rv2jv$1ke$1@sword.avalon.net> <9s0u4l$bn1$1@newsie.singa.pore.net> Subject: Re: Question on EMC Symmetrix Software Lines: 26 X-Priority: 3 X-MSMail-Priority: Normal X-Newsreader: Microsoft Outlook Express 5.50.4522.1200 X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4522.1200 Message-ID: <n4N28.31821$yy3.6200454@typhoon.neo.rr.com> Date: Mon, 21 Jan 2002 04:48:19 GMT NNTP-Posting-Host: 65.29.208.134 X-Complaints-To: abuse@rr.com X-Trace: typhoon.neo.rr.com 1011588499 65.29.208.134 (Sun, 20 Jan 2002 23:48:19 EST) NNTP-Posting-Date: Sun, 20 Jan 2002 23:48:19 EST Organization: Road Runner High Speed Online -- Northeast Ohio