There is no way you’ll see 6GB/s out of a single disk. I think you’re referring to the rated SATA speed, which has nothing to do with the actual data rates you’ll see from the spinning rust. You might see ~130-150MB/s from a single platter in really nice, artificial workloads, more in RAID configurations that can read from multiple disks.
I have 6 WD Red 6TBs in a RAIDZ2 array (ZFS software RAID, nothing even vaguely approaching high-end hardware otherwise) and for typical file-serving workloads, I see about 120-130MBs from it. In contrast, I have a Samsung 950 Pro NVME SSD, and do see over 1G/s throughput in some real-world workloads with it. But it costs >8x the price per storage unit. -j > On Aug 4, 2016, at 2:23 AM, Kaamesh Kamalaaharan <kaam...@novocraft.com> > wrote: > > hi, > thanks for the reply. I have hardware raid 5 storage servers with 4TB WD red > drives. I think they are capable of 6GB/s transfers so it shouldnt be a drive > speed issue. Just for testing i tried to do a dd test directy into the brick > mounted from the storage server itself and got around 800mb/s transfer rate > which is double what i get when the brick is mounted on the client. Are there > any other options or tests that i can perform to figure out the root cause of > my problem as i have exhaused most google searches and tests. > > Kaamesh > > On Wed, Aug 3, 2016 at 10:58 PM, Leno Vo <lenovolastn...@yahoo.com> wrote: > your 10G nic is capable, the problem is the disk speed, fix ur disk speed > first, use ssd or sshd or sas 15k in a raid 0 or raid 5/6 x4 at least. > > > On Wednesday, August 3, 2016 2:40 AM, Kaamesh Kamalaaharan > <kaam...@novocraft.com> wrote: > > > Hi , > I have gluster 3.6.2 installed on my server network. Due to internal issues > we are not allowed to upgrade the gluster version. All the clients are on the > same version of gluster. When transferring files to/from the clients or > between my nodes over the 10gb network, the transfer rate is capped at > 450Mb/s .Is there any way to increase the transfer speeds for gluster mounts? > > Our server setup is as following: > > 2 gluster servers -gfs1 and gfs2 > volume name : gfsvolume > 3 clients - hpc1, hpc2,hpc3 > gluster volume mounted on /export/gfsmount/ > > > > The following is the average results what i did so far: > > 1) test bandwith with iperf between all machines - 9.4 GiB/s > 2) test write speed with dd > dd if=/dev/zero of=/export/gfsmount/testfile bs=1G count=1 > > result=399Mb/s > > 3) test read speed with dd > dd if=/export/gfsmount/testfile of=/dev/zero bs=1G count=1 > > result=284MB/s > > My gluster volume configuration: > > Volume Name: gfsvolume > Type: Replicate > Volume ID: a29bd2fb-b1ef-4481-be10-c2f4faf4059b > Status: Started > Number of Bricks: 1 x 2 = 2 > Transport-type: tcp > Bricks: > Brick1: gfs1:/export/sda/brick > Brick2: gfs2:/export/sda/brick > Options Reconfigured: > performance.quick-read: off > network.ping-timeout: 30 > network.frame-timeout: 90 > performance.cache-max-file-size: 2MB > cluster.server-quorum-type: none > nfs.addr-namelookup: off > nfs.trusted-write: off > performance.write-behind-window-size: 4MB > cluster.data-self-heal-algorithm: diff > performance.cache-refresh-timeout: 60 > performance.cache-size: 1GB > cluster.quorum-type: fixed > auth.allow: 172.* > cluster.quorum-count: 1 > diagnostics.latency-measurement: on > diagnostics.count-fop-hits: on > cluster.server-quorum-ratio: 50% > > Any help would be appreciated. > Thanks, > Kaamesh > > > _______________________________________________ > Gluster-users mailing list > Gluster-users@gluster.org > http://www.gluster.org/mailman/listinfo/gluster-users > > > _______________________________________________ > Gluster-users mailing list > Gluster-users@gluster.org > http://www.gluster.org/mailman/listinfo/gluster-users _______________________________________________ Gluster-users mailing list Gluster-users@gluster.org http://www.gluster.org/mailman/listinfo/gluster-users
