Tharindu Rukshan Bamunuarachchi
2009-Jul-27 07:19 UTC
[Lustre-discuss] Lustre Client Access SAN
this may be an stupid question. but . 1. does Lustre client directly access SAN/storage (like GFS, OCFS or Sun Cluster SVM) 2. if client connects over network, a. will TCP/IP performance directly hit on CFS b. cannot I keep client on same machine as OSS/MDS etc. cheers, __ tharindu ******************************************************************************************************************************************************************* "The information contained in this email including in any attachment is confidential and is meant to be read only by the person to whom it is addressed. If you are not the intended recipient(s), you are prohibited from printing, forwarding, saving or copying this email. If you have received this e-mail in error, please immediately notify the sender and delete this e-mail and its attachments from your computer." ******************************************************************************************************************************************************************* -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.lustre.org/pipermail/lustre-discuss/attachments/20090727/b4ee70b0/attachment.html
On Jul 27, 2009 13:19 +0600, Tharindu Rukshan Bamunuarachchi wrote:> 1. does Lustre client directly access SAN/storage (like GFS, OCFS or > Sun Cluster SVM)No, client only communicates with the server, and only a single server will access storage at any one time.> 2. if client connects over network, > a. will TCP/IP performance directly hit on CFSDepends on what you do. Lustre makes VERY efficient use of GigE network, but it can also use InfiniBand natively for lower latency and higher bandwidth (IPoIB used only for addressing the nodes).> b. cannot I keep client on same machine as OSS/MDS etc.This will work, but is not a 100% supported configuration because of a small risk of deadlock. A patch to reduce the chance of local deadlock has been landed for 1.8.2, but it still isn''t one of our supported configs (i.e. we don''t test this heavily ourselves). Cheers, Andreas -- Andreas Dilger Sr. Staff Engineer, Lustre Group Sun Microsystems of Canada, Inc.