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On 22/03/11 19:22, kashani wrote: |
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> On 3/22/2011 1:13 AM, Mr. Jarry wrote: |
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>> Thanks for replies. As I had expected, they brought even more |
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>> uncertainty then I had before... :-) |
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>> |
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>> ext3/4: |
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>> I excluded them because as I understand, they do not support |
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>> snapshots (only with lvm, which I do not use, and I've hreard |
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>> snapshots in lvm are not very effective, or something like that). |
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>> Next minus-point, I tried resizing of ext3/lvm once in the past |
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>> and remember it was a real pain in a**... |
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> |
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> Any Mysql db smaller than 200GB is being backed up by a combination |
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> of LVM/Ext3 at a large Internet company with a big purple Y. It's mildly |
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> painful to setup, but RHEL uses LVM by default so it's just a matter of |
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> resizing to get the partitions you need. Once that's done you can kick |
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> off snapshots with very little effort. |
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> |
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> Not sure where you heard it was ineffective and I'd ignore further |
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> information from that source. |
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|
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It goes like this: |
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|
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Reduce: |
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- make fs smaller |
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- make volume smaller to match fs |
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|
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Enlarge |
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- enlarge volume |
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- enlarge fs to match volume |
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|
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Use snapshots |
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- find name of snapshot |
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- mount it somewhere |
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|
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Oh look. Two commands in each case instead of magic hand waving. And you |
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have to think about what you are doing with reduce/enlarge because the |
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order is reversed. Yes, I can truly see why the OP found a comment on |
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them thar intartubes that the whole thing is broken and can't work. Yes, |
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I can really see that now. |
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|
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But considering that the thread is all about "what is the best |
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filesystem?", that too is to be expected. The very title belies a lack |
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of understanding - the best filesystem for you is the one you have |
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tested and found best suits your needs. |
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|
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Asking "what is the best filesystem?" without also supplying an array of |
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metrics and actual performance data is a mind-bogglingly stupid |
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question, along the lines of "what is the best girlfriend/wife/SO?" |
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|
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-- |
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alan dot mckinnon at gmail dot com |
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