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On Sun, 27 Nov 2011 09:02:37 +0100 |
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Róbert Čerňanský <hslists2@××××××.sk> wrote: |
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> On Sun, 27 Nov 2011 00:01:07 +0100 |
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> Alex Schuster <wonko@×××××××××.org> wrote: |
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> |
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> > pvcreate /dev/sda5 |
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> > vgcreate myvg /dev/sda5 |
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> > lvcreate -n usr -L 10G myvg |
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> > mke2fs -j /dev/myvg/usr |
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> > |
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> > Of course, just using /dev/sda5 for /usr is simpler. But what if |
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> > this turns out to be too small? With so many partitions I would |
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> > think this is very likely to happen sooner or later. With LVM, all |
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> > you'd have to do is: |
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> > |
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> > lvresize -L +1G /dev/myvg/usr |
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> > resize2fs /dev/myvg/usr |
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> |
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> Here I do not understand from where this +1G is taken? Don't you have |
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> to make something smaller by 1G first? |
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The 1G is taken from the free pool of unused extents. This assumes you |
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have free extents, if not, then you do need to free some up somwehere |
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else first. |
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Using LVM is a lot like using a SAN - don't allocate everything right |
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at the beginning, rather give each lv what it needs today and grow it |
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as space needs change. This way you always have free extents available |
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for use. |
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-- |
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Alan McKinnnon |
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alan.mckinnon@×××××.com |
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