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IWETHEY Home / IWETHEY Board / Hardware Forum / ya gotta remember
Post #179,625
by boxley
10/17/04 1:26:23 PM
Reply
New ya gotta remember
that a LUN (Logical Unit} is a logical description of a space on a harddrive. Lat time I used them it was 4 LUNs to a spindle, so tying 4 luns into a Raid means you are writing to a stripe that consists of 4 write operations on a single spindle as opposed to 1 write. Thus takes 3.5 times longer.
thanx,
bill
Any opinions expressed by me are mine alone, posted from my home computer, on my own time as a free american and do not reflect the opinions of any person or company that I have had professional relations with in the past 48 years. meep
questions, help? [link|mailto:pappas@catholic.org|email pappas at catholic.org]
Post #179,626
by broomberg
10/17/04 1:31:20 PM
Reply
New Oh ye of little space
I've already got the info I need from the Clariion Best Practices.
In my case, it is: "You EXPECTED what?!?!
Well, not exactly, but there are many caveats and setup dependancies that makes it seem next to impossibly to get better striped performance using MetaLUNS. Seems more like a sales pitch check-off than a real thing I would use.

As far as spindles, no way. In this particular case of have 5 disk reaid sets. Each of the raid sets provide a single LUN. I then want to stripe across ALL of the in a single MetaLUNs. So I should be striping across 20 disks by the time I'm done.
     Hey Box: EMC question - (broomberg) - (32) - Oct. 17, 2004, 09:15:37 AM EDT
         nit - concatenate is reredundantant -NT - (deSitter) - (29) - Oct. 17, 2004, 09:17:02 AM EDT
             Explain why. -NT - (broomberg) - (28) - Oct. 17, 2004, 09:25:25 AM EDT
                 Re: Explain why. - (deSitter) - (27) - Oct. 17, 2004, 09:36:26 AM EDT
                     "To tie up with a chain" - (broomberg) - (26) - Oct. 17, 2004, 10:25:18 AM EDT
                         AARRGGGH!!!!! -NT - (deSitter) - (25) - Oct. 17, 2004, 10:26:54 AM EDT
                             Link. - (static) - (24) - Oct. 18, 2004, 04:30:16 AM EDT
                                 I can read - (deSitter) - (23) - Oct. 18, 2004, 04:50:13 AM EDT
                                     Stop being an Il-literati Colostomic Baboon. - (folkert) - (1) - Oct. 18, 2004, 07:55:33 AM EDT
                                         Words are important - (deSitter) - Oct. 18, 2004, 08:35:29 AM EDT
                                     Christ you're so full of crap - (admin) - (20) - Oct. 18, 2004, 11:07:25 AM EDT
                                         Is that anything like: - (folkert) - Oct. 18, 2004, 11:51:14 AM EDT
                                         Re: Christ you're so full of crap - (deSitter) - (18) - Oct. 18, 2004, 11:57:03 AM EDT
                                             "Wrong". - (pwhysall) - Oct. 18, 2004, 12:03:03 PM EDT
                                             Re: Christ you're so full of crap - (admin) - (1) - Oct. 18, 2004, 12:15:14 PM EDT
                                                 ROFL -NT - (deSitter) - Oct. 18, 2004, 12:28:19 PM EDT
                                             You've got a point. - (Another Scott) - (14) - Oct. 18, 2004, 12:36:41 PM EDT
                                                 Re: You've got a point. - (deSitter) - (13) - Oct. 18, 2004, 01:04:13 PM EDT
                                                     Latin != English. - (pwhysall) - (12) - Oct. 18, 2004, 01:09:55 PM EDT
                                                         Deep -er- profound -NT - (deSitter) - (11) - Oct. 18, 2004, 01:12:22 PM EDT
                                                             And correct, you'll find. - (pwhysall) - (10) - Oct. 18, 2004, 01:27:50 PM EDT
                                                                 Implying that there is a correct use of English is silly... -NT - (inthane-chan) - (9) - Oct. 18, 2004, 01:28:31 PM EDT
                                                                     S'not. - (pwhysall) - (8) - Oct. 18, 2004, 01:30:58 PM EDT
                                                                         Thanks for proving my point. :) -NT - (inthane-chan) - (7) - Oct. 18, 2004, 01:45:40 PM EDT
                                                                             Woosh. -NT - (pwhysall) - (6) - Oct. 18, 2004, 01:46:12 PM EDT
                                                                                 You must hear that noise a lot. -NT - (inthane-chan) - (5) - Oct. 18, 2004, 01:53:47 PM EDT
                                                                                     A Merkin, meet Irony. Irony, this is a Merkin. -NT - (pwhysall) - (4) - Oct. 18, 2004, 02:02:03 PM EDT
                                                                                         Heh. - (inthane-chan) - (3) - Oct. 18, 2004, 02:06:59 PM EDT
                                                                                             Ever the reply of someone who's Been Had :-p -NT - (pwhysall) - (2) - Oct. 18, 2004, 02:08:12 PM EDT
                                                                                                 Well, I'm not the one who mistook me for a Merkin. - (inthane-chan) - (1) - Oct. 18, 2004, 02:31:05 PM EDT
                                                                                                     Well, you look like one from here. - (pwhysall) - Oct. 18, 2004, 02:39:00 PM EDT
         ya gotta remember - (boxley) - (1) - Oct. 17, 2004, 01:26:23 PM EDT
             Oh ye of little space - (broomberg) - Oct. 17, 2004, 01:31:20 PM EDT

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