On 05/23/2011 12:24 PM, John R Pierce wrote: > yes,butt.... SSD has to erase and write a LARGE block all at once, so > they don't do so well with the sorts of 8k random writes that write > intensive applications like relational databases commonly perform. Many SSD are faster at writing even to already used blocks than disk drives are. Still, to stay on topic, the suggestion that I put forth was to use the SSD for external journals for ext3 filesystems with journal=data. In that case, the OS should pretty much always be writing full blocks to the SSD, so there should be even less concern about small random writes.