similar to: different read i/o performance for equal guests

I''m running Postgresql (v8.1.10) on Solaris 10 (Sparc) from within a non-global zone. I originally had the database "storage" in the non-global zone (e.g. /var/local/pgsql/data on a UFS filesystem) and was getting performance of "X" (e.g. from a TPC-like application: http://www.tpc.org). I then wanted to try relocating the database storage from the zone (UFS

Today I updated the firmware on my StorageTek 2540 to the latest recommended version and am seeing radically difference performance when testing with iozone than I did in February of 2008. I am using Solaris 10 U5 with all the latest patches. This is the performance achieved (on a 32GB file) in February last year: KB reclen write rewrite read reread 33554432

5-nodes server and 1 node client are connected by gigabits Ethernet. #] iozone -r 32k -r 512k -s 8G KB reclen write rewrite read reread read write read rewrite read fwrite frewrite fread freread 8388608 32 10559 9792 62435 62260 8388608 512 63012 63409 63409 63138 It seems 32k write/rewrite performance are very

I asked Ted about his patch for ext3 and ext2 and this is his response. I am not sure if his post will reach lkml since it's sent to vger.rutgers.edu IMHO, With the amount of work Andrew has done to make ext3 usable for MTA applications, Ted's work would make ext3 even better for MTA apps sinc both Postfix/qmail use 'find' in their control-scripts and queue statistics program

On Fri, May 21, 2010 at 15:37:45AM -0400, Josef Bacik wrote: > On Fri, May 21, 2010 at 11:21:11AM -0400, Christoph Hellwig wrote: >> On Wed, May 19, 2010 at 04:24:51PM -0400, Josef Bacik wrote: >> > Btrfs cannot handle having logically non-contiguous requests submitted. For >> > example if you have >> > >> > Logical: [0-4095][HOLE][8192-12287]

Hello, Has anyone here installed CentOS on a Dell Poweredge with a SAS 5IR controller? Does it work? With what driver? Is this real hardware RAID? Thanks, -- Francois Caen, RHCE, CCNA SpiderMaker, LLC

Hi Matt, Can you please provide us with more information? 1. what version of glusterfs are you using 2. Was the iozone run as root or user? a. if user, did it have the required permissions? 3. steps to reproduce the problem 4. Any other errors related to stripe in the clinet log? With regards, Shishir ________________________________________ From: gluster-users-bounces at gluster.org

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

Here are my results: Summary: I am not able to reproduce the problem, IOW I get relatively equivalent numbers for sequential IO when going against 3.10.5 or 3.12.0 Next steps: - Could you pass along your volfile (both for a brick and also the client vol file (from /var/lib/glusterd/vols/<yourvolname>/patchy.tcp-fuse.vol and a brick vol file from the same place) - I want to check

Hi, Well I have a freshly built system with ZFS raidz. Intel P4 2.4 Ghz 1GB Ram Marvell Technology Group Ltd. MV88SX6081 8-port SATA II PCI-X Controller (2) Intel Dual Port 1Gbit nics I have (5) 300GB disks in a Raidz1 with Zfs. I''ve created a couple of FS on this. /export/downloads /export/music /export/musicraw I''ve shared these out as well. First with ZFS ''zfs

Hi, I am measuring the performance of my newly bought NAS with IOZone. The NAS is of an embedded linux with samba installed. (CPU is Intel Atom) The IOZone reported that write performance to be over 1GBps while the file size less or equals to 1GB. Since the nic is 1Gbps, the maximum speed is supposed to be 125MiBps at most. The testing report of IOZone is amazing. Later I found that If the

Greetings Gentlemen, I''m currently testing a new setup for a ZFS based storage system with dedup enabled. The system is setup on OI 148, which seems quite stable w/ dedup enabled (compared to the OpenSolaris snv_136 build I used before). One issue I ran into, however, is quite baffling: With iozone set to 32 threads, ZFS''s ARC seems to consume all available memory, making

Dear Jatin, Maybe it’s a good idea first to implement Spice: <video> <model type='qxl' ram='65536' vram='65536' heads='1'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/> </video>

Looking at the Dell PowerEdge 440SC web page for Colombia. The box will have two 250 GB SATA drives. The HD controller is: SAS 5IR SAS,Internal Raid Adapter (SAS5IR) for HD Configuration) the options are: (1) Add-in SAS5iR (SATA/SAS Controller)-RAID 0 (ASASR0) (2) Onboard SATA, 2 Drives connected to Onboard SATA Controller No RAID (MST2) (3) Add-in SAS5iR (SATA/SAS Controller) which supports

Hi all, Can anyone please steer me in the right direction with this one? I've searched the net, but couldn't find a clear answer. How do I actually generate graphs from iozone, using OpenOffice? Every website I've been to simply mentions that iozone can output an xls file which can be used in MS Excel to generate a 3D graph. But, I can't see how it's actually done. Can anyone

Hi, I am currently making some i/o performance tests within domUs with iozone3. One scenario is a domU with file-backed VBDs (root and swap) as sda1 and sda2 lying on an nfs-kernel-server (2.6.14.4 - Debian Sarge). The exact iozone command is: iozone -a -R -b result.xls -f /tmp/iozone.test -n 1m -g 256m -i 0 -i 1 As soon as the iozone-test comes to a filesize of 132M, the complete! system

Hi, We''re doing some benchmarking at a customer (using IOzone) and for some specific small block random tests, performance of their X4500 is very poor (~1.2 MB/s aggregate throughput for a 5+1 RAIDZ). Specifically, the test is the IOzone multithreaded throughput test of an 8GB file size and 8KB record size, with the server physmem''d to 2GB. I noticed a couple of peculiar

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 I've noticed that when I use ProxyCommand commands to connect, the commands do not exit when ssh exits. This results in a bunch of commands piling up on the machine over time. I experimented with four machines: linux-2.2.19+patches, openssh-3.0.1p1 linux-2.2.14+patches, openssh-3.0.1p1 freebsd-4.5-stable, openssh-2.9 localisations 20020307

Hello: Sorry for asking iozone ques in this mailing list but couldn't find any mailing list on iozone... In IOZone, is there a way to configure # of outstanding requests client sends to server side? Something on the lines of IOMeter option "Number of outstanding requests". Thanks a lot!

Hello, I''m having difficulties to find documentation about the parameters that are used in the guests configuration files. For example, I don''t know what means the "extra", the "on_reboot", "on_crash", etc. Any help? Thanks. Pedro Simões _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com