search for: iozone

...ay it only affects btrfs and not everybody else, would >you prefer I do something like that? I will make the commit log a bit more >verbose. Thanks, > >Josef I guess was hit by those "slightly less optimal I/O patters for other file-systems" while measuring performance with iozone sequential using direct I/O with 64k requests. First I only saw increased cpu costs and a huge number of request merges, analyzing that brought me to this patch (reverting fixes the issue). Therefore I''d like to come back to that suggested "that way it only affects btrfs" soluti...

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!

...S on this. /export/downloads /export/music /export/musicraw I''ve shared these out as well. First with ZFS ''zfs set sharenfs=on'' Then with /etc/dfs/dfstab. On a Solars 10 client host I would mount that Files System Vers=3. Then CD to that mountpoint and proceed to run iozone {from Blastwave} <root at vmserver2 /mnt/downloads> # iozone -Racb iozone.`hostname`.wks > iozone.data Sometime during the test I get a ''NFS server timsnas-nfs not responding still trying'' NFS is dead at this point. To no avail. A reboot of the NFS server is order to re...

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 please help me with this? I've run the following command on a CentOS 5.4 server...

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. L...

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 [gluster-users-bounces at...

...es export share with name of "gvol": hardwares: brick use a raid 5 logic disk with 8 * 2T SATA HDDs 10G network connection one linux client mount the "gvol" with cmd: [root at localhost current]# mount.cifs //192.168.100.133/gvol /mnt/vfs -o user=kane,pass=123456 then i use iozone to test the write performance in mount dir "/mnt/vfs": [root at localhost current]# ./iozone -s 10G -r 128k -i0 -t 4 ?.. File size set to 10485760 KB Record Size 128 KB Command line used: ./iozone -s 10G -r 128k -i0 -t 4 Output is in Kbytes/sec Time Resolution = 0.000001 seconds. Pr...

Having done a current checkout, creating a new FS and running iozone [1] on it results in an oops [2]. remove_suid is called, accessing offset 14 of a NULL pointer. Let me know if you''d like me to test any fix, do further debugging or get more information. Thanks, Daniel --- [1] # mkfs.btrfs /dev/sda4 # mount /dev/sda4 /mnt /mnt# iozone -a . --- [2]...

Dear ALL, IHAC who would like to use Sun Fire X4500 to be the NFS server for the backend services, and would like to see the potential performance gain comparing to their existing systems. However the outputs of the I/O stress test with iozone show the mixed results as follows: * The read performance sharply degrades (almost down to 1/20, i.e from 2,000,000 down to 100,000) when the file sizes are larger than 256KBytes. * The write performance remains good (roughly 1,000,000) even with the file sizes larger tha...

...14.04 glusterfs 3.10.5 16GB Ram 24 drive array on LSI raid Sustained >1.5GB/s to XFS (77TB) Server 2: Single E5-2620 v3 Ubuntu 16.04 glusterfs 3.10.5 32GB Ram 36 drive array on LSI raid Sustained >2.5GB/s to XFS (164TB) Speed tests are done with local with single thread (dd) or 4 threads (iozone) using my standard 64k io size to 20G or 5G files (20G for local drives, 5G for gluster) files. Servers have Intel X520-DA2 dual port 10Gbit NICS bonded together with 802.11ad LAG to a Quanta LB6-M switch. Iperf throughput numbers are single stream >9000Mbit/s Here is my current gluster per...

I'm testing iozone inside a VM booted from a gluster volume. By looking at network traffic on the host (the one connected to the gluster storage) I can see that a simple iozone -w -c -e -i 0 -+n -C -r 64k -s 1g -t 1 -F /tmp/gluster.ioz will make about 1200mbit/s on a bonded dual gigabit nic (probably, with a bad b...

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/te...

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 no...

...rick 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 what options are in use in your setup as compared to mine and see if that makes a difference - Is it possible for you to run the IOZone test, as below (it needs more clarification in case you have not used IOZone before, so reach out in that case) in your setup and report the results? - Details: Test: IOZone iozone -+m /<clientlistfile> -+h <hostaddr> -C -w -c -e -i 0 -+n -r 256k -s 2g -t 4/8/16/32 - Sequential...

...ased ZIL devices. I have a test machine with the crummiest hard drive I can find installed in it, Quantum Fireball ATA-100 4500RPM 128K cache, and an Intel X25-E 32gig SSD drive. I''m trying to do A-B comparisons and am coming up with some very odd results: The first test involves doing IOZone write testing on the fireball standalone, the SSD standalone, and the fireball with the SSD as a log device. My test command is: time iozone -i 0 -a -y 64 -q 1024 -g 32M Then I check the time it takes to complete this operation in each scenario: Fireball alone - 2m15s (told you it was crappy)...

...ds. >> With 3.10.5 each server has 800MB/s network traffic, cluster total is >> 32GB/s >> With 3.12.0 each server has 200MB/s network traffic, cluster total is >> 8GB/s >> I did not change any volume options in both configs. > > > I just performed some *basic* IOZone tests on a 6 x (4+2) disperse volume > and compared this against 3.10.5 and 3.12.0. The tests are no where near > your capacity, but I do not see anything alarming in the results. (4 server, > 4 clients, 4 worker thread per client) > > I do notice a 6% drop in Sequential and random w...

...nse time when deployed using RHEL(Host)+ KVM is : 1050 milli-seconds. The response time of the application when deployed on KVM is twice as much as when it is deployed using VMware ESXi. I did few more tests to find which sub-system on these servers shows varying metrics. First i started with IOZone to find out if there is any mismatch in the speed with which data is read / written to the local disk on the two VMs and found that "Read" speed in the VM that was deployed using RHEL(Host)+KVM was twice as slow as the VM which was deployed using VMware ESXi. For more on IoZone , Ple...

...id > Sustained >1.5GB/s to XFS (77TB) > > Server 2: > Single E5-2620 v3 > Ubuntu 16.04 > glusterfs 3.10.5 > 32GB Ram > 36 drive array on LSI raid > Sustained >2.5GB/s to XFS (164TB) > > Speed tests are done with local with single thread (dd) or 4 threads > (iozone) using my standard 64k io size to 20G or 5G files (20G for local > drives, 5G for gluster) files. > > Servers have Intel X520-DA2 dual port 10Gbit NICS bonded together with > 802.11ad LAG to a Quanta LB6-M switch. Iperf throughput numbers are single > stream >9000Mbit/s > >...

...aid > Sustained >1.5GB/s to XFS (77TB) > > Server 2: > Single E5-2620 v3 > Ubuntu 16.04 > glusterfs 3.10.5 > 32GB Ram > 36 drive array on LSI raid > Sustained >2.5GB/s to XFS (164TB) > > Speed tests are done with local with single thread (dd) or 4 threads (iozone) using my standard 64k io size to 20G or 5G files (20G for local drives, 5G for gluster) files. > > Servers have Intel X520-DA2 dual port 10Gbit NICS bonded together with 802.11ad LAG to a Quanta LB6-M switch. Iperf throughput numbers are single stream >9000Mbit/s > > Here is my...

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 p...