24 May
2011
24 May
'11
8:33 a.m.
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.