similar to: cfq vs. deadline?

This patchset expands traditional CFQ scheduler in order to support cgroups, and improves old version. Improvements are as following. * Modularizing our new CFQ scheduler. The expanded CFQ scheduler is registered/unregistered as new I/O elevator scheduler called "cfq-cgroups". By this, the traditional CFQ scheduler, which does not handle cgroups, and our new CFQ

This patchset expands traditional CFQ scheduler in order to support cgroups, and improves old version. Improvements are as following. * Modularizing our new CFQ scheduler. The expanded CFQ scheduler is registered/unregistered as new I/O elevator scheduler called "cfq-cgroups". By this, the traditional CFQ scheduler, which does not handle cgroups, and our new CFQ

This patch add a interface for parameter of cfq driver data. Signed-off-by: Satoshi UCHIDA <s-uchida at ap.jp.nec.com> --- block/cfq-cgroup.c | 59 +++++++++++++++++++++++++++++++++++++++++++++++++++- 1 files changed, 58 insertions(+), 1 deletions(-) diff --git a/block/cfq-cgroup.c b/block/cfq-cgroup.c index 4938fa0..776874d 100644 --- a/block/cfq-cgroup.c +++

Hi Jeff, On 07/03/2010 03:58 AM, Jeff Moyer wrote: > Hi, > > Running iozone or fs_mark with fsync enabled, the performance of CFQ is > far worse than that of deadline for enterprise class storage when dealing > with file sizes of 8MB or less. I used the following command line as a > representative test case: > > fs_mark -S 1 -D 10000 -N 100000 -d /mnt/test/fs_mark -s

This patch introcude cfq_cgroup structure which is type for group control within expanded CFQ scheduler. In addition, the cfq_cgroup structure has "ioprio" entry which is preference of group for I/O. Signed-off-by: Satoshi UCHIDA <s-uchida at ap.jp.nec.com> --- block/cfq-cgroup.c | 148 +++++++++++++++++++++++++++++++++++++++++

This patch introduces iprio class for cfq data control layer. By applying this patch, controller can also handle the RT/IDLE properties among groups. Signed-off-by: Satoshi UCHIDA <s-uchida at ap.jp.nec.com> --- block/cfq-cgroup.c | 344 +++++++++++++++++++++++++------------------ include/linux/cfq-iosched.h | 1 + 2 files changed, 203 insertions(+), 142 deletions(-)

This patch introduces iprio class for cfq data control layer. By applying this patch, controller can also handle the RT/IDLE properties among groups. Signed-off-by: Satoshi UCHIDA <s-uchida at ap.jp.nec.com> --- block/cfq-cgroup.c | 344 +++++++++++++++++++++++++------------------ include/linux/cfq-iosched.h | 1 + 2 files changed, 203 insertions(+), 142 deletions(-)

Hi again, It seems that I have a problem again. When I startup the database, it has an error: ORA-29701: cannot connect to Cluster Manager. 1. I have started the the cluster manager, and ps -ef shows that watchdog and and oracm is running. 2. I've looked into the cm.log, and it seems that both nodes have registered successfully. Sure could use some help. Thanks. Warm regards, Faisal

Dear R-er, For a non-linear optimisation, I used optim() with BFGS method but it stopped regularly before to reach a true mimimum. It was not a problem with limit of iterations, just a local minimum. I was able sometimes to reach better minimum using several rounds of optim(). Then I moved to optimx() to do the different optim rounds automatically using "Nelder-Mead" and

Hello, I have two nodes running the 2.6.9-22.0.2.ELsmp kernel and the OCFS2 1.2.1 RPMs. About once a week, one of the nodes crashes itself (self- fencing) and I get a full vmcore on my netdump server. The netdump log file shows the shared filesystem LUN (/dev/dm-6) did not respond within 12000ms. I have not changed the default heartbeat values in /etc/sysconfig/o2cb. There was no other IO

Hello, I''ve seen from time to time where a domU using heavy disk I/O can slow down an entire server (including all other domU''s and dom0). Is there a way to schedule or limit this in Xen 3.0.3? Thank you, Brian ** _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel

Given that the default journaling mode of ext3 (i.e. ordered), does not guarantee write ordering after a crash, is this journaling mode safe enough to use for a database such as Oracle? If so, how are out of sync writes delt with? Kind regards, Herta Disclaimer: http://www.kuleuven.be/cwis/email_disclaimer.htm

Hi, all, I just found out that xen assigns the NOOP disk scheduler for linux guest OSes. Dom0 uses cfq scheduler (it is the linux default). Is there a reason for xen to turn off disk request merging in the quest OS by selecting a NOOP scheduler? Is it because the request optimization will be performed in dom0 or VMM ? Thansk in advance, Jia. _______________________________________________

I downloaded the RPMs from the Oracle web site (otn.oracle.com) and successfully installed them on my C5 box, but the sqlplus client software would not run properly. After a few iterations with sealert, I finally got a handle on what was happening. It turns out that most of the shared libraries Oracle installs need to have their SElinux file context modified to allow relocation. Here's

Hi, If you are not already tired of so many io controller implementations, here is another one. This is a very eary very crude implementation to get early feedback to see if this approach makes any sense or not. This controller is a proportional weight IO controller primarily based on/inspired by dm-ioband. One of the things I personally found little odd about dm-ioband was need of a dm-ioband

Hi, If you are not already tired of so many io controller implementations, here is another one. This is a very eary very crude implementation to get early feedback to see if this approach makes any sense or not. This controller is a proportional weight IO controller primarily based on/inspired by dm-ioband. One of the things I personally found little odd about dm-ioband was need of a dm-ioband

Hi list ! We have a very busy webserver hosted in a clustered environment where the document root and data is on a GFS2 partition off a fiber-attached disk array. Now on busy moments, I can see in htop, nmon that there is a fair percentage of cpu that is waiting for I/O. In nmon, I can spot that the most busy block device correspond to our gfs2 partition where many times, it shows that

Hi, I'm building a test asterisk server and building the latest kernel I got to wonder if there are any specific recommendations about schedulers and so forth for optimum performance. There are a few areas that raise questions in my mind and I wonder if anyone has any opinions/comments on which settings are most suitable for use with asterisk: SLAB Allocator (SLAB or SLUB?) Tickless

Hello, I've successfully configured RAC on Redhat AS, with external firewire + ocfs. The whole process was done without any errors and have created the database. (Thanks to Wim Coekaerts useful article). But now, how do I actually use it? If I have a client making a connection, to which node do I connect? Are there also any recommended procedures to test RAC's capabilities? Thanks.

remember that even tho you have a filesystem etc it's always good to have seperate partitions for stuff. eg don't put all your redologs and mirrors on the same partition or don't put your archives on the same partition as data. this is not just for ocfs, but just .. common sense I think to split stuff up.