 Home |
Products |
Support |
Community |
News |
xen-users
[Xen-users] xen & iSCSI
| To: | xen-users@xxxxxxxxxxxxxxxxxxx |
|---|---|
| Subject: | [Xen-users] xen & iSCSI |
| From: | Daniel De Marco <ddm@xxxxxxxxxxxxxxx> |
| Date: | Thu, 24 Sep 2009 14:13:22 -0400 |
| Delivery-date: | Thu, 24 Sep 2009 11:14:10 -0700 |
| Envelope-to: | www-data@xxxxxxxxxxxxxxxxxxx |
| List-help: | <mailto:xen-users-request@lists.xensource.com?subject=help> |
| List-id: | Xen user discussion <xen-users.lists.xensource.com> |
| List-post: | <mailto:xen-users@lists.xensource.com> |
| List-subscribe: | <http://lists.xensource.com/mailman/listinfo/xen-users>, <mailto:xen-users-request@lists.xensource.com?subject=subscribe> |
| List-unsubscribe: | <http://lists.xensource.com/mailman/listinfo/xen-users>, <mailto:xen-users-request@lists.xensource.com?subject=unsubscribe> |
| Sender: | xen-users-bounces@xxxxxxxxxxxxxxxxxxx |
| User-agent: | Mutt/1.5.19 (2009-01-05) |
Hi, I'm setting up xen (on centos 5.3) and I'm facing a weird performance issue with iSCSI. I attach the iSCSI targets to dom0 and if I use them from dom0 I obtain good performance with simple dd tests (~100MB/s both reading and writing). I then use the block devices for the domU and if I repeat the same dd test from within the domU the write performace is still good (~100MB/s), but the read performance is cut in half (~55MB/s). I tried changing several parameters like read_ahead and such, but I can not obtain a good read performance in the domU. Any idea? Thanks, Daniel. _______________________________________________ Xen-users mailing list Xen-users@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-users |
| <Prev in Thread] | Current Thread | [Next in Thread> |
|---|---|---|
| ||
| Previous by Date: | Re: [Xen-users] SCO Openserver 5 on Xen 3.2, Pasi Kärkkäinen |
|---|---|
| Next by Date: | Help needed running an X11 environment inside a DomU (Re: [Xen-users] Creating a paravirtualized guest with Xen 3.4.1 andCentos 5.3 (64bit)), Martin Troester |
| Previous by Thread: | [Xen-users] SCO Openserver 5 on Xen 3.2, cyruspy |
| Next by Thread: | Re: [Xen-users] xen & iSCSI, John Madden |
| Indexes: | [Date] [Thread] [Top] [All Lists] |
