[Ocfs2-users] cfq vs. deadline?

Brian Long brilong at cisco.com
Tue May 16 08:47:06 CDT 2006


I understand Oracle currently recommends using the deadline scheduler
because of a bug in cfq.  In reading a recent thread on nahant-
list at redhat.com, using the deadline scheduler on an NFS server reduced
IO wait significantly.  Also, the description of the deadline scheduler
sounds like it would be ideal for databases.

Does Oracle have any recommendation wrt. sticking with the deadline
scheduler even after cfq is fixed?  Have any performance numbers been
generated which show one scheduler is better than the other on dedicated
DB hosts?

Thank you.

/Brian/
-- 
       Brian Long                      |         |           |
       IT Data Center Systems          |       .|||.       .|||.
       Cisco Linux Developer           |   ..:|||||||:...:|||||||:..
       Phone: (919) 392-7363           |   C i s c o   S y s t e m s




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