On 2006-04-03, DA Morgan <damorgan_at_psoug.org> wrote:
> JEDIDIAH wrote:
>> On 2006-04-03, DA Morgan <damorgan_at_psoug.org> wrote:
>>> Laurenz Albe wrote:
>>>> Michael42 <melliott42_at_yahoo.com> wrote:
>>>>> If ASM is a trend of the future I'd like to understand what it's
>>>>> benefits are.
>>>> It gives Oracle Corporation control over your storage system, which makes
>>>> them happy, so they promote it.
>>>>
>>>> Yours,
>>>> Laurenz Albe
>>> On the positive side:
>>>
>>> 1. It provides a single point of support so there is no finger-pointing.
>>> 2. It provides easy management of block devices (raw partitions).
>>> 3. It automatically moves hot blocks to the outside of the disk.
>>> 4. It is vendor and operating system neutral.
>>> 5. It, additionally, provides all of the features of an LVM.
>>> 6. It is included in your license so no additional cost for the software
>>> or its support.
>>>
>>> But does Oracle gain control over the storage system? I don't see how
>>> this is any different from letting any other vendor supply an LVM.
>>
>> That statement simply boggles the mind.
>>
>> The typical LVM doesn't cut you off from standard filesystem
>> level tools like ASM does. The typical LVM doesn't attempt to replace
>> the fileystem layer of an OS entirely. They just present a complex
>> disk device to the system as a simple one.
>>
>> This makes your points 4 & 5 untrue in practice.
>>
>> ASM is basically a replacement for Oracle raw disks.
>
> Why and how can it boggle the mind? ASM is for use on block devices.
> There is no file system. There is no file system to cut you off from.
Thus the fundemental divergence of ASM versus LVM solutions.
> One of us is missing something here and I'm not sure which of us it
> is. What you referring to with ASM that has anything to do with files?
>
> You state: "ASM is basically a replacement for Oracle raw disks."
> Oracle has never had raw disks ... operating systems have disks
> without file systems. Again I am confused as to what you are thinking.
Not surprising really. You seem to confuse easily.
--
Apple: Because a large harddrive is for power users.
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Received on Tue Apr 04 2006 - 11:42:19 CDT
