Re: Database and RAID

Posted in 1998

Doug Johnson — 18 Jun 1998 02:05:11 GMT — source: Informix-list mailing list archive (1991-1998)

The correct sequence is sync h/w mirror, CKPT&BLOCK, split mirror, then UNBLOCK. The split takes seconds for GB databases, maybe a couple of minutes for TB databases. Since the CKPT blocks writers, the new BLOCK for split extends the writer-freeze but as always readers continue and no clients are dropped. ..snip useful clarification > Set the mode to BLOCK, turn on your h/w mirror, when it is sync'ed turn > it back off and UNBLOCK your system. > Dave > > Dave Kosenko davek@summitdata.com > Director of Training Services (732) 469-4070 > Summit Data Group (an Informix Authorized Education Center) >