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| 08:55 stockholm | i am thinking that we (at work) want a fai class SSD for solid state disks |
| 08:56 stockholm | they seem to need special attention for optimal performance and ware leveling. |
| 08:56 stockholm | has someone done that already? |
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| 09:14 Mrfai | No. But I think it just a case of choosing the right file system. journaling file system seems to be a bad choice. |
| 09:15 Mrfai | I would also add noatime to the mount options. |
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| 12:43 stockholm | Mrfai: aparently you also need to tell them that the operating system considers parts of the disk free |
| 12:44 stockholm | or rather, get the OS to tell them which parts are free |
| 12:45 Mrfai | I think there are tools which can reset an SSD, so it knows everything is free. |
| 12:45 Mrfai | Like a low level format |
| 13:03 stockholm | ah, i didnt know |
| 13:03 stockholm | but the problem is that a disk does not know that a file that was removed actually freed all the space that it once occupied. |
| 13:04 stockholm | the OS knows the space is free, but not the disk, by default. |
| 13:05 stockholm | and then i think batch writing (in long consequitive (?) chunks) is fast on normal disks and it is not on ssds. |
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| 20:05 FBI | fai: 3 lange committed revision 6196 to 7 fai: do not use fcopy for /etc/modules |
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| 21:38 mikap | stockholm: recent linux kernels support for TRIM |
| 21:43 stockholm | yes, i read about that, too |
| 21:43 stockholm | did you read about databases on SSDs in LWN the other week? |
| 21:44 stockholm | there was an article about an DB convention. OpenSQL or so |
| 21:46 mikap | didn't read that, no |
| 21:48 mikap | though ssd really rocks (l2arc, anyone? :)) |
| 21:48 mikap | couldn't imagine kernel related work without ssd anymore ;) |
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| --- Wed Nov 24 2010 |