Partition possible as caching device; external journal for Ext4?

DISCUSSION Hans Kraus 1 participant 1 message Sep 27, 2013 bcache (block layer cache)

Share & tools

Hans Kraus

author

2013-09-27 08:21 UTC #0 lore raw

Hi,

is it possible to use only a partition of an SSD as caching device for bcache or is a complete device necessary?

Is there a rule of thumb for the cache size? Eg. at what value I do get diminishing returns?

When I cache a big Raid6 with Ext4, makes it still sense (performance wise) to put the journal on a separate SSD partition?

Regards, Hans