From: Ming Z. <mi...@el...> - 2005-07-27 16:36:51
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On Thu, 2005-07-28 at 00:24 +0800, Feizhou wrote: > >>>>I have a question for you. I want to use iscsi array > >>>>to store database data file. I hope I can get some > >>>>kind of redundency (RAID) as well as dynamic increase > >>>>disk space without shuting down the database to > >>>>rebuild the array. The database will have transactions > >>>>all the time and can't be shutdown. > >>>> > >>>> > > > >i am thinking if possible to have > >mysql + xfs + open-iscsi + iet + lvm + md. so if need larger size, just > >add another software raid to vg and then do lvextend, then do rescan on > >iet (need develop), then do a xfs online resize? > > > > > > xfs the fs? Ugh. ext3 with data=journal would be better in case of a > crash or what ever. can ext3 do online resize? i am not sure. > > unless you have free hotswap SCSI bays available, adding another > software raid will have to mean another box with iet. but raid5 can not dynamic add disk and expand size right? > > At same blinking time, lvm does not tolerate losing physical volumes so > if a iet box goes down.... iet is on top of lv, so even iet box crash, hopefully lvm is still there. > > very murky this one :P any suggestion? ming |