Fighting a 'know it all' admin
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I can't believe I just had the dumbest argument in my life with a guy that is trying to tell me that RAID 1 is useless. He says that it 'cuts your server performance in half' and is trying to tell me that instead we should set the drives up in the servers as stripe sets and then have mirrored servers. Sheesh…. Trying to build a reasonable system for a small company here (best performance for the buck) and here is trying to convince me to buy 2 servers to do what I can get one to do. I have used RAID 1 for years and never seen a noticeable loss in performance unless you do the mirroring in software and not with a controller. Sure, if I was going for high speed AND high availability I would use mirrored stripe sets, but I still would not bother mirroring the servers. The company is not that big and does not have the cash to spend. Just needed to vent.
George Carlin wrote: "Don't sweat the petty things, and don't pet the sweaty things." Jörgen Sigvardsson wrote: If the physicists find a universal theory describing the laws of universe, I'm sure the asshole constant will be an integral part of that theory.
My Blog[^]
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I can't believe I just had the dumbest argument in my life with a guy that is trying to tell me that RAID 1 is useless. He says that it 'cuts your server performance in half' and is trying to tell me that instead we should set the drives up in the servers as stripe sets and then have mirrored servers. Sheesh…. Trying to build a reasonable system for a small company here (best performance for the buck) and here is trying to convince me to buy 2 servers to do what I can get one to do. I have used RAID 1 for years and never seen a noticeable loss in performance unless you do the mirroring in software and not with a controller. Sure, if I was going for high speed AND high availability I would use mirrored stripe sets, but I still would not bother mirroring the servers. The company is not that big and does not have the cash to spend. Just needed to vent.
George Carlin wrote: "Don't sweat the petty things, and don't pet the sweaty things." Jörgen Sigvardsson wrote: If the physicists find a universal theory describing the laws of universe, I'm sure the asshole constant will be an integral part of that theory.
My Blog[^]
Depends on your setup. If you have IDE drives and both drives are on the same channel, you are going to get something of a slowdown as IDE doesn't have asynchronous capabilities. But you're right, with a hardware RAID setup, and SCSI drives, you shouldn't see very much of a slowdown (one drive will always acknowledge before the other - the controller should not acknowledge until both drives have). Stability. What an interesting concept. -- Chris Maunder
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Depends on your setup. If you have IDE drives and both drives are on the same channel, you are going to get something of a slowdown as IDE doesn't have asynchronous capabilities. But you're right, with a hardware RAID setup, and SCSI drives, you shouldn't see very much of a slowdown (one drive will always acknowledge before the other - the controller should not acknowledge until both drives have). Stability. What an interesting concept. -- Chris Maunder
Mike Dimmick wrote: If you have IDE drives and both drives are on the same channel, you are going to get something of a slowdown as IDE doesn't have asynchronous capabilities. Does SATA suffer from this as well? I am just starting to take a look at this tech (always did SCSI before) and was wondering...
George Carlin wrote: "Don't sweat the petty things, and don't pet the sweaty things." Jörgen Sigvardsson wrote: If the physicists find a universal theory describing the laws of universe, I'm sure the asshole constant will be an integral part of that theory.
My Blog[^]
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Mike Dimmick wrote: If you have IDE drives and both drives are on the same channel, you are going to get something of a slowdown as IDE doesn't have asynchronous capabilities. Does SATA suffer from this as well? I am just starting to take a look at this tech (always did SCSI before) and was wondering...
George Carlin wrote: "Don't sweat the petty things, and don't pet the sweaty things." Jörgen Sigvardsson wrote: If the physicists find a universal theory describing the laws of universe, I'm sure the asshole constant will be an integral part of that theory.
My Blog[^]
I'm pretty sure Serial ATA only supports point-to-point links, it is not a bus. Therefore yes, since each controller port only talks to one drive, the problem disappears. Intel's current ICH6 I/O Controller Hub chip implements four SATA ports. Most add-in cards also offer four ports, I believe. Stability. What an interesting concept. -- Chris Maunder
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I'm pretty sure Serial ATA only supports point-to-point links, it is not a bus. Therefore yes, since each controller port only talks to one drive, the problem disappears. Intel's current ICH6 I/O Controller Hub chip implements four SATA ports. Most add-in cards also offer four ports, I believe. Stability. What an interesting concept. -- Chris Maunder
Thats what I thought. Thanks. ...time to play.
George Carlin wrote: "Don't sweat the petty things, and don't pet the sweaty things." Jörgen Sigvardsson wrote: If the physicists find a universal theory describing the laws of universe, I'm sure the asshole constant will be an integral part of that theory.
My Blog[^]