Date: Mon, 31 Oct 2011 12:34:06 +0200 From: Ivan Natchkov <ivan.natchkov@gmail.com> To: freebsd-fs@freebsd.org Subject: ZFS question - clones vs dedupe Message-ID: <CA%2Bwowm92R%2BM4-Z-sr20ngnNnm8PN5DTpNi40UX-O%2BAKRoJjfQA@mail.gmail.com>
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Hello to everyone, I have the following situation. EVA 4000 with 3T disk space and one oracle DB 1,2T on a different storage. On our EVA we must keep copy of this DB with non stop applying of archive logs. In addition we need 3-4 development DB's plus 3-4 test DB's which are copies of the original 1,2T DB and are stored on the EVA. We are thinking about 2 scenarios. 1) 8 clonings with keeping differences between the clonings 2) to have 8 different DB made with zfs send/receive on the same storage with deduplication switch ON. In both scenario we want the DB with applying logs to be with dedupe switched off because of the performance issues. I have 20 Gigs of RAM and the DDT table is possible to be kept in it with some tuning of sysctl. Which scenario would you recommend in terms of performance? Regards: Ivan
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