This is the version. VRTSvcs-4.1.00.10-GA_RHEL4 VRTSvxfs-common-4.1.00.10-GA_RHEL4
On 3/1/07, Rebanta Mitra <[EMAIL PROTECTED]> wrote:
Hi, Are you seeing a sudden jump of the cpu usage ?
After file size is grown more than 2GB or 4GB, we can see constant high cpu rate. Actually, our application is calling fdatasync() periodically to ensure that the data is written to disk. Also, does the application
create lots of dirty pages?
Not lot. Application is writing ~1.5KB size data chunk per millisecond. (i.e. about 700-1000 transactions per second, one transaction is 1.5K) If that's the case, then in most of the o/s the
cpu usage can increase because it has to go through the dirty list to check and lock each of the pages until the data is flushed.
Does VxFS is using Linux's Disk Caching Mechanism or Its own caching mechanism. BTW, what's the veritas-ha stack being used ? VRTSvcs-4.1.00.10-GA_RHEL4 VRTSvxfs-common-4.1.00.10-GA_RHEL4 One thing more, Where can i download trial version of above software?? regards,
-Rebanta From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Tharindu Rukshan Bamunuarachchi Sent: Tuesday, February 27, 2007 9:35 PM To: Veritas-ha@mailman.eng.auburn.edu Cc: veritas-vx@mailman.eng.auburn.edu Subject: [Veritas-ha] fdatasync makes process 100% cpu We are using Veritas SFCFS for Linux. When our program is trying to call fdatasync() to sync file core data with disk, process cpu was increased to 100%. Any idea on behavior of fdatasync() when used with Veritas cfs. I hope Veritas behavior would be differ from typical Linux behavior. Pls help Thankx Tharindu -- Tharindu Rukshan Bamunuarachchi all fabrications are subject to decay Content-Description: ATT535579.txt _______________________________________________ Veritas-ha maillist - Veritas-ha@mailman.eng.auburn.edu http://mailman.eng.auburn.edu/mailman/listinfo/veritas-ha ----- End forwarded message ----- _______________________________________________ Veritas-ha maillist - Veritas-ha@mailman.eng.auburn.edu http://mailman.eng.auburn.edu/mailman/listinfo/veritas-ha
-- Tharindu Rukshan Bamunuarachchi all fabrications are subject to decay
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