[Lustre-discuss] Quick writeback cache question

Daire Byrne
Fri, 27 Feb 2009 12:19:41 -0000

Hi,

Is the client writeback cache only active for each file written or can it cache
multiple files simultaneously? I''m assuming it is the former. So if I
write a big single file the cache will help but if I write lots of small files
it will be of little use? I''m testing Lustre over a high latency VPN
and finding that reading from a home dir on Lustre is very good (thanks to the
negative dentry cache and client cache) but writing lots of small files is still
very slow for each file.

Cheers,

Daire