Yes! We are using LVM extensively. So cfq is being used on LVM by default then?
Marcy This message may contain confidential and/or privileged information. If you are not the addressee or authorized to receive this for the addressee, you must not use, copy, disclose, or take any action based on this message or any information herein. If you have received this message in error, please advise the sender immediately by reply e-mail and delete this message. Thank you for your cooperation. -----Original Message----- From: Linux on 390 Port [mailto:[email protected]] On Behalf Of Peter Oberparleiter Sent: Thursday, October 25, 2012 12:55 AM To: [email protected] Subject: Re: [LINUX-390] I/O scheduler on sles 11 sp2 on z On 24.10.2012 18:54, Marcy Cortes wrote: > "On IBM System z the default I/O scheduler for a storage device is set by the > device driver", but trying to query what it is seems to indicate that > everything is deadline already (but it must not be or the parm wouldn't have > helped). Could it be that you are using LVM which adds its own block devices which are not affected by DASD's elevator defaults? Regards, Peter Oberparleiter -- Peter Oberparleiter Linux on System z Development - IBM Germany ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For more information on Linux on System z, visit http://wiki.linuxvm.org/ ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For more information on Linux on System z, visit http://wiki.linuxvm.org/
