Hi everyone,
we see at our cluster relatively slow Single Thread Performance on the
iscsi Nodes.
Our setup:
3 Racks:
18x Data Nodes, 3 Mon Nodes, 3 iscsi Gateway Nodes with tgt (rbd cache off).
2x Samsung SM863 Enterprise SSD for Journal (3 OSD per SSD) and 6x WD
Red 1TB per Data Node as
lists.ceph.com] On Behalf Of Horace
Sent: 21 July 2016 10:26
To: w...@globe.de
Cc: ceph-users@lists.ceph.com
Subject: Re: [ceph-users] Ceph + VMware + Single Thread Performance
Hi,
Same here, I've read some blog saying that vmware will frequently verify the
locking on VMFS over iSCSI, hence i
...@lists.ceph.com] On Behalf Of
w...@globe.de
Sent: 21 July 2016 13:04
To: n...@fisk.me.uk; 'Horace Ng'
Cc: ceph-users@lists.ceph.com
Subject: Re: [ceph-users] Ceph + VMware + Single Thread Performance
Hi,
hmm i think 200 MByte/s is really bad. Is your Cluster in production right now?
It&#
Is there not a way to enable Linux page Cache? So do not user D_Sync...
Then we would the dramatically performance improve.
Am 21.07.16 um 14:33 schrieb Nick Fisk:
-Original Message-
From: w...@globe.de [mailto:w...@globe.de]
Sent: 21 July 2016 13:23
To: n...@fisk.me.uk; 'Hora
rados bench...
*rados bench -p rbd 60 write -b 4M -t 1*
Am 21.07.16 um 14:38 schrieb w...@globe.de:
Is there not a way to enable Linux page Cache? So do not user D_Sync...
Then we would the dramatically performance improve.
Am 21.07.16 um 14:33 schrieb Nick Fisk:
-Original Message-
would need 10 threads to be
able to write to 10 nodes at the same time.
Jake
On Thursday, July 21, 2016, w...@globe.de <mailto:w...@globe.de>
mailto:w...@globe.de>> wrote:
What i not really undertand is:
Lets say the Intel P3700 works with 200 MByte/s rados bench on
.
You get exactly the same problems with reading when you don’t set the
readahead above 4MB.
*From:*ceph-users [mailto:ceph-users-boun...@lists.ceph.com] *On
Behalf Of *w...@globe.de
*Sent:* 21 July 2016 14:05
*To:* ceph-users@lists.ceph.com
*Subject:* Re: [ceph-users] Ceph + VMware + Single
Hi List,
i am using Ceph Infernalis and Ubuntu 14.04 Kernel 3.13.
18 Data Server / 3 MON / 3 RBD Clients
I want to use RBD on the Client with image format 2 and Striping.
Is it supported?
I want to create rbd with:
rbd create testrbd -s 2T --image-format=2 --image-feature=striping
--image-featu
