search for: righi

Hi All, I have got excellent results of dm-ioband, that controls the disk I/O bandwidth even when it accepts delayed write requests. In this time, I ran some benchmarks with a high-end storage. The reason was to avoid a performance bottleneck due to mechanical factors such as seek time. You can see the details of the benchmarks at: http://people.valinux.co.jp/~ryov/dm-ioband/hps/ Thanks, Ryo

Hi All, I have got excellent results of dm-ioband, that controls the disk I/O bandwidth even when it accepts delayed write requests. In this time, I ran some benchmarks with a high-end storage. The reason was to avoid a performance bottleneck due to mechanical factors such as seek time. You can see the details of the benchmarks at: http://people.valinux.co.jp/~ryov/dm-ioband/hps/ Thanks, Ryo

Hi All, I have got excellent results of dm-ioband, that controls the disk I/O bandwidth even when it accepts delayed write requests. In this time, I ran some benchmarks with a high-end storage. The reason was to avoid a performance bottleneck due to mechanical factors such as seek time. You can see the details of the benchmarks at: http://people.valinux.co.jp/~ryov/dm-ioband/hps/ Thanks, Ryo

I''ve searched all night long on google, discussions, threads, and the xen wiki... but I can''t find how to do this: vif = [''type=ioemu,mac=XX:XX:XX:XX:XX:XX,model=ne2k_pci''] where should I put this? I have sxce94, dom0 works nicely, and domUs too, but I''d like to select ne2k for an hvm openbsd dom0 that I''ve created because I''ve read

...ys.sleep(0.1); if(x == 4) stop()}, mc.cores = 4, mc.preschedule = F) ``` When there are many calculations in FUN, it takes a long time before the error is returned. It would be nice if there were an option to exit (all child processes) early on error. Is there any way to do this? Thanks, Giovanni Righi

Thanks for the response, Jeremie. I wholeheartedly agree about testing. In my case, this feature would be used purely to reduce computation time. I?m calculating an expensive (and embarrassingly parallel) likelihood function, and for some parameter combinations my objective function diverges to infinity. In those instances, I?d like to throw an error that stops subsequent computations and that I

...h worth a try here to speed things up ? i`m a little bit unsure, but i assume "no" as this is to be used when llseek() is costly, correct ? i`m asking as i don`t want to waste time with experiments at a customer site. regards roland This patch adds the --sparse-block option. Andrea Righi writes: In some filesystems, typically optimized for large I/O throughputs (like IBM GPFS, IBM SAN FS, or distributed filesystems in general) a lot of lseek() operations can strongly impact on performances. In this cases it can be helpful to enlarge the block size used to handle sparse fil...

In some filesystems, typically optimized for large I/O throughputs (like IBM GPFS, IBM SAN FS, or distributed filesystems in general) a lot of lseek() operations can strongly impact on performances. In this cases it can be helpful to enlarge the block size used to handle sparse files directly from a command line parameter. For example, using a sparse write size of 32KB, I've been able to

...Andre Renaud <andre@bluewatersys.com> Andre Schramm <andre.schramm@iosono-sound.com> Andrea Adami <andrea.adami@gmail.com> Andrea Arcangeli <aarcange@redhat.com> Andrea Arcangeli <andrea@qumranet.com> Andrea Gelmini <andrea.gelmini@gelma.net> Andrea Righi <andrea@betterlinux.com> Andreas Bießmann <andreas@biessmann.de> Andreas Dilger <adilger@dilger.ca> Andreas Dilger <adilger@whamcloud.com> Andreas Dumberger <andreas.dumberger@tqs.de> Andreas Eversberg <andreas@eversberg.eu> Andreas Eversberg <joll...

...Andre Renaud <andre@bluewatersys.com> Andre Schramm <andre.schramm@iosono-sound.com> Andrea Adami <andrea.adami@gmail.com> Andrea Arcangeli <aarcange@redhat.com> Andrea Arcangeli <andrea@qumranet.com> Andrea Gelmini <andrea.gelmini@gelma.net> Andrea Righi <andrea@betterlinux.com> Andreas Bießmann <andreas@biessmann.de> Andreas Dilger <adilger@dilger.ca> Andreas Dilger <adilger@whamcloud.com> Andreas Dumberger <andreas.dumberger@tqs.de> Andreas Eversberg <andreas@eversberg.eu> Andreas Eversberg <joll...

...Andre Renaud <andre@bluewatersys.com> Andre Schramm <andre.schramm@iosono-sound.com> Andrea Adami <andrea.adami@gmail.com> Andrea Arcangeli <aarcange@redhat.com> Andrea Arcangeli <andrea@qumranet.com> Andrea Gelmini <andrea.gelmini@gelma.net> Andrea Righi <andrea@betterlinux.com> Andreas Bießmann <andreas@biessmann.de> Andreas Dilger <adilger@dilger.ca> Andreas Dilger <adilger@whamcloud.com> Andreas Dumberger <andreas.dumberger@tqs.de> Andreas Eversberg <andreas@eversberg.eu> Andreas Eversberg <joll...

...Andre Renaud <andre@bluewatersys.com> Andre Schramm <andre.schramm@iosono-sound.com> Andrea Adami <andrea.adami@gmail.com> Andrea Arcangeli <aarcange@redhat.com> Andrea Arcangeli <andrea@qumranet.com> Andrea Gelmini <andrea.gelmini@gelma.net> Andrea Righi <andrea@betterlinux.com> Andreas Bießmann <andreas@biessmann.de> Andreas Dilger <adilger@dilger.ca> Andreas Dilger <adilger@whamcloud.com> Andreas Dumberger <andreas.dumberger@tqs.de> Andreas Eversberg <andreas@eversberg.eu> Andreas Eversberg <joll...

...Andre Renaud <andre@bluewatersys.com> Andre Schramm <andre.schramm@iosono-sound.com> Andrea Adami <andrea.adami@gmail.com> Andrea Arcangeli <aarcange@redhat.com> Andrea Arcangeli <andrea@qumranet.com> Andrea Gelmini <andrea.gelmini@gelma.net> Andrea Righi <andrea@betterlinux.com> Andreas Bießmann <andreas@biessmann.de> Andreas Dilger <adilger@dilger.ca> Andreas Dilger <adilger@whamcloud.com> Andreas Dumberger <andreas.dumberger@tqs.de> Andreas Eversberg <andreas@eversberg.eu> Andreas Eversberg <joll...

...Andre Renaud <andre@bluewatersys.com> Andre Schramm <andre.schramm@iosono-sound.com> Andrea Adami <andrea.adami@gmail.com> Andrea Arcangeli <aarcange@redhat.com> Andrea Arcangeli <andrea@qumranet.com> Andrea Gelmini <andrea.gelmini@gelma.net> Andrea Righi <andrea@betterlinux.com> Andreas Bießmann <andreas@biessmann.de> Andreas Dilger <adilger@dilger.ca> Andreas Dilger <adilger@whamcloud.com> Andreas Dumberger <andreas.dumberger@tqs.de> Andreas Eversberg <andreas@eversberg.eu> Andreas Eversberg <joll...

...Andre Renaud <andre@bluewatersys.com> Andre Schramm <andre.schramm@iosono-sound.com> Andrea Adami <andrea.adami@gmail.com> Andrea Arcangeli <aarcange@redhat.com> Andrea Arcangeli <andrea@qumranet.com> Andrea Gelmini <andrea.gelmini@gelma.net> Andrea Righi <andrea@betterlinux.com> Andreas Bießmann <andreas@biessmann.de> Andreas Dilger <adilger@dilger.ca> Andreas Dilger <adilger@whamcloud.com> Andreas Dumberger <andreas.dumberger@tqs.de> Andreas Eversberg <andreas@eversberg.eu> Andreas Eversberg <joll...

...Andre Renaud <andre@bluewatersys.com> Andre Schramm <andre.schramm@iosono-sound.com> Andrea Adami <andrea.adami@gmail.com> Andrea Arcangeli <aarcange@redhat.com> Andrea Arcangeli <andrea@qumranet.com> Andrea Gelmini <andrea.gelmini@gelma.net> Andrea Righi <andrea@betterlinux.com> Andreas Bießmann <andreas@biessmann.de> Andreas Dilger <adilger@dilger.ca> Andreas Dilger <adilger@whamcloud.com> Andreas Dilger <andreas.dilger@intel.com> Andreas Dumberger <andreas.dumberger@tqs.de> Andreas Eversberg <and...

...Andre Renaud <andre@bluewatersys.com> Andre Schramm <andre.schramm@iosono-sound.com> Andrea Adami <andrea.adami@gmail.com> Andrea Arcangeli <aarcange@redhat.com> Andrea Arcangeli <andrea@qumranet.com> Andrea Gelmini <andrea.gelmini@gelma.net> Andrea Righi <andrea@betterlinux.com> Andreas Bießmann <andreas@biessmann.de> Andreas Dilger <adilger@dilger.ca> Andreas Dilger <adilger@whamcloud.com> Andreas Dilger <andreas.dilger@intel.com> Andreas Dumberger <andreas.dumberger@tqs.de> Andreas Eversberg <and...