similar to: Correlate i/o with a process

Hi, we run an "old" mailserver system which was set up a couple of years ago. The systme dose "everything" what we need(ed). Over the last days I noticed an unnormal increase of the system load up to 10 and lots of users told me that there mailclient connections (sending and receiving) are dropped from time to time. I was planing to exchange the server respectively distribut

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 all. We developped a pv-scsi driver that we refered Fujita-san''s scsi-driver and blkback. (see, http://www.xensource.com/files/xensummit_4/Xen_Summit_8_Matsumoto.pdf) The pv-scsi driver''s feature is as follow: * Guest has dedicated SCSI-HBAs of Dom0. * Guest can send scsi_cdb to the HBAs. * Guest recognises the HBAs from hostno of xenstore. Currentlly, We are

# cat /etc/redhat-release CentOS Linux release 7.1.1503 (Core) # uname -r 3.10.0-123.20.1.el7.x86_64 Hi, We use iSCSI over a 10G Ethernet Adapter and SRP over an Infiniband adapter to provide multipathing to our storage: # lspci | grep 10-Gigabit 81:00.0 Ethernet controller: Intel Corporation 82599ES 10-Gigabit SFI/SFP+ Network Connection (rev 01) 81:00.1 Ethernet controller: Intel Corporation

Hello, I've recently been given domain over a number of supermicro storage servers using Broadcom / LSI SAS2004 PCI-Express Fusion-MPT SAS-2 [Spitfire] (rev 03) to run a bunch of SSDs. I was attempting to do fresh installs of CentOS 8 and have come to find out that RedHat deprecated support for a number of HBAs for 8 including all running the SAS2004 chip. Does anyone know if there is a

> On Nov 11, 2020, at 5:38 PM, Warren Young <warren at etr-usa.com> wrote: > > On Nov 11, 2020, at 2:01 PM, hw <hw at gc-24.de> wrote: >> >> I have yet to see software RAID that doesn't kill the performance. > > When was the last time you tried it? > > Why would you expect that a modern 8-core Intel CPU would impede I/O in any measureable way as

hhbuur at linux-ezva:~> wine /media/MIPro90-DAN/setup.exe wine: could not exec the wine loader hhbuur at linux-ezva:~> wine /usr/bin/winemine.exe wine: could not exec the wine loader hi thes is my problem i do not get in contact whit my wine no mater wot i do a there som help to get whit wine loader. wot can prevent wine loader from start op. :?

Hello everyone, Current host build is RHEL 6.2, soon to be upgrading. I'm in the process of mapping out a KVM/RHEV topology. I have questions about the landscape of storage pools and the instantiation of specific scsi_host IDs using virsh nodedev-create and some magic XML definitions. I'm grouping these questions together because the answer to one may impact the other. High-level

I have a PCI device which can perform bus master DMA. I developed a PCI device driver which can allocate DMA buffer and provide mmap operation to map the I/O and DMA buffer to user space. The PCI device driver works well under Linux 2.6.20. However it brokes under XEN 3.0.4. It appears that mmap map to the wrong memory. remap_pfn_range in mmap function return no error when it is used to map

Hi everyone, I'm trying to use idmap_rid on an AIX 5.3 ML4 machine. Samba compiled successfully using the IBM compiler (vac.C) version 6. The only programs I supplied where db and libiconv. I followed the instructions, and put nsswitch/WINBIND in /usr/lib/security, and edited /usr/lib/security/methods.cfg. When I start "winbindd -i", it coredumps with a Signal 11: (dbx) where

How can I verify if I am using SAN for my Linux Server? Also, how do I find WWNs of HBAs? TIA -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.centos.org/pipermail/centos/attachments/20070822/f0c3aa9b/attachment.html>

I've got my RAC cluster running pretty smoothly now (thanks again for all the help so far), but I only have single connections between the servers and the RAID array. The servers each have two Qlogic HBAs, and I'd like to find out if there's any reasonable way to implement multipathing. The platform is RHEL 3, and Red Hat's knowledgebase indicates that they strongly recommend

Hi all, I'm troubleshooting an ocfs2 performance problem where creating files in a directory containing ~180k files is taking significant time to complete. Sometimes creating an empty file will take >100 seconds to complete. This is a three node cluster. I'm currently running OCFS2 1.2.3-1. Are there any changes in a recent version that may address this issue? What should I look

What initiators does libvirt support for the iSCSI pool? Will it work with qlogic's iSCSI HBAs for instance? --- Alexander Pierce, RHCE Solutions Architect -- Red Hat, Inc. apierce at redhat.com -- +1 (530) MR-LINUX (675-4689) Learn. Network. Experience Open Source. The 2010 Red Hat Summit and JBoss World Boston. June 22 - 25, 2010 http://www.theredhatsummit.com http://www.jbossworld.com

I apologize in advance as this is not really at CentOS specific issue, but I don't know where else to turn. We are configuring some Dell 1850s for a customer, and they have all been configured with a QLogic dual channel HBA. But no storage has been (or will be in the near future) attached to these HBAs. During the boot process (both for the kickstart and after the OS has been

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Due to a hardware maintenance (moving some gluster volumes to Infiniband, so adding/configuring the IB HBAs), we'll have to shutdown some nodes in the CentOS Infra. Migration is scheduled for Friday November 19th, 9:30 am UTC time. You can convert to local time with $(date -d '2014-11-19 09:30 UTC') The expected "downtime" is

* NEW CHANNEL DRIVER FOR ASTERISK 1.6 AND VOXSWITCH 3 ADDS AUDIO AND VIDEO TO MICROBLOGGING! In a surprising move, Digium in partnership with Edvina today released a new channel driver for Asterisk, chan_tweet. The driver connects seamlessly to several microblogging platforms, including Twitter, Facebook, Laconi.ca/Identi.ca and GSM text/SMS. The main feature of this new module is to

I''m wondering if FLR really must be supported by the PCI card for PCI/VGA passthrough to work or if it will work anyway. I have read in the VTdHowTo that trying to pass through hardware without the FLR feature will result in an error. At the same time I read on a pdf document on the VMWare website (http://www.vmware.com/files/pdf/techpaper/vsp_4_vmdirectpath_host.pdf) that:

Hello, I want to do a plot of two series, but adding a secondary axis in the rigth side to take into account the different scales of the two series. Anyone can tell me haw can I do that in R? Thank you very much Maria -- View this message in context: http://www.nabble.com/secondary-axis-in-a-plot-tp17402079p17402079.html Sent from the R help mailing list archive at Nabble.com.

Greetings. At the moment, I'm applying R to some AIX 'nmon' output, trying to get a handle on some disk performance metrics. In case anyone's interested: http://docs.osg.ufl.edu/tsm/pdf/ some of them are more edifying than others. (ahem) I'm trying to develop a somewhat general framework for plotting these measures, in the hopes that it's of some use to people other