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On 2013-11-15 5:18 PM, Alan McKinnon <alan.mckinnon@×××××.com> wrote: |
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> On 15/11/2013 23:58, Tanstaafl wrote: |
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>> Now, the question is, what the heck is thin-provisioning in lvm2, am I |
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>> using it, and if not, do I need it? |
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>> |
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>> I'm pretty sure I'm not using it, but how to be sure? |
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> Google for "thin-provisioning+in+lvm2", first three hits. |
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> |
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> In a nutshell, you can define an LV without actually allocating the |
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> storage yet that you are not using, it gets allocated "on demand" if you |
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> will. |
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> |
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> It's similar in concept to the general idea behind sparse files, lazy |
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> initialization, fixed size vs dynamically allocated disks for VMs and do |
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> on: allocate a resource only when you need it. |
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> |
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> This lets you over-commit storage space as much of it is not being used |
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> in practice. |
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> |
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> If you use thin provisioning, you already know it. There are steps you |
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> must take to put it to use. |
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Thanks Alan... |
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But fyi, my last questions were more just me talking to myself... of |
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course my google-fu is fairly strong, and like you I found all of my |
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answers this morning when I searched... |
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I chose not to use thin provisioning in vmWare because I just don't like |
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the idea... maybe irrational, because I do see the advantages. |
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I'd be curious to learn if anyone here uses it with lvm, and what their |
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experience has been - especially, are there any gotcha's to watch out for? |
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But for now, to rebuild my kernels without lvm thin provisioning (it is |
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enabled) and emerge -C thin-provisioning-tools... |
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